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PCC Connection Diagram 39.0. 39.0. .::c. 0.01 p.F COLLISION PAIR o "'U 01) W (Q ..... ....... l> Z (f) W N .,.. (Q ..... l> U (/) 0 ...J + I + X 0::: >< 0 Q 0 X 0:: C,) 0:: (,) (,) (,) a:: RECEIVE PAIR c:~SE::L_-I5 GND 7 8 4321282726 • DP8391A SNI c:--=L;:::BK':""'-Il0 20 19 CAP 25~R~X~--4 ______
c( .,... ~ C\I C') en z ...... c( .,... G) C') f c 5.0 Pin Descriptions (DIP) Pin No. (PCC) Name 1 1 COL 2 2 RXD 3 3 CRS 4 4 RXC 5 5 SEL 6 6-9 GND 7 10 LBK S 11 X1 9 12 X2 10 13 TXD 11 14 TXC 12 15 TXE 13 16 TX- 14 17 TX+ 15 18 NC 16 17 19 CAP 18 20-23 VCC 19 20 24 NC 21 25 RX- 22 26 RX+ 23 27 CO- 24 28 CD+ I/O Description 0 Collision Detect Output. A TTL/MOS level active high output. A 10 MHz (+25%-15%) signal at the collision input will produce a logic high at COL output. When no signal is present at the collision input, COL output will go low. 0 Receive Data Output. A TTL/MOS level signal. This is the NRZ data output from the digital phase·locked loop. This signal should be sampled by the controller at the rising edge of receive clock. 0 Carrier Sense. A TTL/MOS level active high signal. It is asserted when valid data from the transceiver is present at the receive input. It is de-asserted one and a half bit times after the last bit at receive input. 0 Receive Clock. A TTL/MOS level recovered clock. When the phase-locked loop locks to a valid incoming signal a 10 MHz clock signal is activated on this output. This output remains low during idle (5 bit times after activity ceases at receive input). I Mode Select. A TTL level input. When high, transmit + and transmit - outputs are at the same voltage in idle state providing a "zero" differential. When low, transmit + is positive with respect to transmit - in idle state. Negative Supply Pins. I Loopback. A TTL level active high on this input enables the loopback mode. I Crystal or External Frequency Source Input (TTL). 0 Crystal Feedback Output. This output is used in the crystal connection only. It must be left open when driving X1 with an external frequency source. I Transmit Data. A TTL level input. This signal is sampled by the SNI at the rising edge of transmit clock when transmit enable input is high. The SNI combines transmit data and transmit clock signals into a Manchester encoded bit stream and sends it differentially to the transceiver. 0 Transmit Clock. A TTL/MOS level 10 MHz clock signal derived from the 20 MHz oscillator. This clock signal is always active. I Transmit Enable. A TTL level active high data encoder enable input. This signal is also sampled by the SNI at the rising edge of transmit clock. 0 Transmit Output. Differential line driver which sends the encoded data to the transceiver. These outputs are source followers and require 2700 pulldown resistors to G NO. No Connection. 0 Bypass Capacitor. A ceramic capacitor (greater than 0.001 ",F) must be connected from this pin to GND. Positive Supply Pins. A 0.1 ",F ceramic decoupling capacitor must be connected across VCC and GND as close to the device as possible. I I No Connection. Receive Input. Differential receive input pair from the transceiver. Collision Input. Differential collision input pair from the transceiver. 1-108
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~ National ~ Semiconductor 400014 R
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TRADEMARKS Following is the most cu
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II) c ~ ~National ~ ~ Semiconductor
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Table of Contents (Continued) Secti
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Alpha-Numeric Index(continUed) DS36
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Section 1 Local Area Networks IEEE
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~National ~ Semiconductor DP8390C/N
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3.0 Functional Description (Continu
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5.0 Pin Descriptions (Continued) BU
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6.0 Direct Memory Access Control (D
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7.0 Packet Reception (Continued) Re
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8.0 Packet Transmission (Continued)
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10.0 Internal Registers (Continued)
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12.0 Loopback Diagnostics (Continue
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13.0 Bus Arbitration and Timing The
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13.0 Bus Arbitration and Timing (Co
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13.0 Bus Arbitration and Timing (Co
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15.0 Switching Characteristics AC S
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15.0 Switching Characteristics (Con
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AC Timing Test Conditions Input Pul
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2.0 Block Diagram COL CRS PROTOCOL
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Page 114 and 115: AC Timing Test Conditions Input Pul
Page 116 and 117: 2.0 Block Diagram TRANSCEIVER CABLE
Page 120 and 121: 6.0 Absolute Maximum Ratings Recomm
Page 122 and 123: 9.0 Timing and Load Diagrams (Conti
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Page 138 and 139: I: • • • • • • Interrup
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Page 148 and 149: Truth Table for Various Collision D
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Page 160 and 161: StarLAN With The DP839EB Evaluation
Page 162 and 163: SUPPORTING DOCUMENTS The following
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Page 166: ELECTROSTATIC DISCHARGE TEST (ESD)
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Section 2 Contents DP8340INS32440 I
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.. 0 C'I C") en .... z 0 C") GO Go
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~ 'OIl' N CO) (J) Z .... o 'OIl' CO
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Timing Characteristics Oscillator F
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Timing Waveforms (Continued) TA REG
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.. ... ~ ~National ~ ~ Semiconduc
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Detailed Functional Pin Description
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Message Format (Continued) DATA REC
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Timing Characteristics (Notes 2, 6,
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Timing Waveforms (Continued) 4T±(T
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Typical Applications (Continued) +5
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Timing Characteristics (Continued)
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Functional Timing Waveforms (Contin
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Typical Applications (Continued) DA
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Absolute Maximum Ratings (Note 1) I
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MUX~ __________________ The BIPLAN
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An EPROM implementation was selecte
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MASTER MUL TIPLEXING/DE-MUL TIPLEXI
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AN·496 '" 0, '" (U17/ (U23/6) TO 5
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AN-496 t W19 ~ J2-43 I' [; 0 J2-42
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AN·496
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DP8342/DP8343 HIGH SPEED INTERFACE
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2.0 Connection Diagram A13- 12 A12-
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3.0 Pin Descriptions (Continued) Si
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~ ~ 4.0 Electrical Specifications (
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4.0 Electrical Specifications (Cont
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~ ~ 4.0 Electrical Specifications (
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~L ______________ ___ ~ ~ 4.0 Elect
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5.0 Instruction Set Overview (Conti
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6.0 Instruction Set Reference (Cont
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~ C') 6.0 Instruction Set Reference
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! 6.0 Instruction Set Reference (Co
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~ ~ 6.0 Instruction Set Reference (
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== ~ 6.0 Instruction Set Reference
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7.0 CPU Registers (Continued) BIT I
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7.0 CPU Registers (Continued) BIRO
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7.0 CPU Registers (Continued) 76543
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7.0 CPU Registers (Continued) BIT D
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7.0 CPU Registers (Continued) BIT D
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8.0 Remote Interface and Arbitratio
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~ ~ HASM state TCU state eLK-OUT RE
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10.0 Transceiver (Continued) (a) 32
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10.0 Transceiver (Continued) TABLE
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10.0 Transceiver (Continued) dotted
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10.0 Transceiver (Continued) TABLE
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10.0 Transceiver (Continued) {also
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Decoding Bit Fields with the JRMK I
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Receiver Interrupts/Flags for the D
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****************DA ISR*************
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"Interrupts"-A Powerful Tool of the
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TABLE II. (lCR) Interrupt Mask Bits
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Running the DP8344 with wait states
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» z I U'I Q 01:00 INSTRUCTION ADDR
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WHY EPROM SOFT-LOAD? In a stand-alo
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RESET ~. Timing at Beginning of Ins
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.. I CRYSTAL ~~~.~ I UP TO 64K OP83
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The roll-off frequency, Fro, should
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ceives messages whose first frame a
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RECEIVER INTERRUPT The receiver int
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JMP n LJMP n JMPR Rs JMPI Ptr JRMK
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00044 F90a :J- 226 Z • 227 MOVE A
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l> Z 00074 80BD 2'18 en • 00075 0
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Section 3 ISDN Components
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Introduction To National Semiconduc
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NSC Solutions for Layers 2 and 3 Na
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NSC Solutions: Systems Level Basic
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~National ~ Semiconductor PRELIMINA
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ISDN DEFINITIONS "B" Channel, or DS
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~ '" TE2 UP TO 8 TERMINALS -
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Section 4 Contents INS8250/INS8250-
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3.0 AC Electrical Characteristics T
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. ID
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5.0 Block Diagram INTERNAL DATA IUS
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6.0 Pin Descriptions (Continued) In
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8.0 Registers (Continued) and 1, on
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8.0 Registers (Continued) 8.5 INTER
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4.0 Timing Waveforms (Continued) Re
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6.0 Pin Descriptions (Continued) Re
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8.0 Registers The system programmer
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8.0 Registers (Continued) 8.3 PROGR
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8.0 Registers (Continued) Table II
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9.0 Typical Applications (Continued
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Table of Contents 1.0 ABSOLUTE MAXI
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3.0 AC Electrical Characteristics T
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4.0 Timing Waveforms (Continued) Wr
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5.0 Block Diagram AO A, A2 CSD CSI
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6.0 Pin Descriptions (Continued) tr
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... .I>. '" Bit No. TABLE II. Summa
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8.0 Registers (Continued) 8.3 PROGR
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8.0 Registers (Continued) When the
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'" .j>. 01 PHil This shows the basi
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3. The Rx FIFO will hold 16 bytes r
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NS16550A E-J r-o ..... IRQ4 ICU CPU
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TITLE 550APP.ASM - NS16550A INITIAL
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3.0 Board to Board Communications w
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DIAPPS.ASM Flow Chart l> z • ~ CO
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» z I "" CD RDAI: DISABLE IRTS, SE
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COMPARE: SET UP COMPARE BUffER POIN
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.set iCu imsk,lO *aO • set icu -c
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holdloop: nop # br hold loop # # #*
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# msint: save [rO,rl,r2,r3] # movd
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#3/30/B7••••• D2APPS.ASM
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# #*************************** 1655
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A Comparison of the I NS8250, NS 16
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cessed (see Figure 4), The output o
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AC Electrical Characteristics T A =
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~National ~ Semiconductor \ J micro
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1.0 Absolute Maximum Ratings 2.0 Op
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4.0 AC Electrical Characteristics (
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5.0 Timing Waveforms (Continued) ii
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6.0 Connection Diagrams Dual-In-Lln
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8.0 Block Diagram CPU INTERFACE INT
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9.0 Registers (Continued) Bit three
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Section 5 Contents MM74HC942 300 Ba
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Absolute Maximum Ratings (Notes 1 &
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fj ::z:: ~ :::IE :::IE ~ ,---------
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Applications Information (Continued
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Absolute Maximum Ratings (Notes 1 &
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Description of Pin Functions Pin No
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Electrical Characteristics Unless o
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C'I 5 Pin Descriptions (Continued)
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IlAV22 RXIN LOCAL OSCILLATOR (L.O.)
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Functional Description (Continued)
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Functional Description (Continued)
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Absolute Maximum Ratings* If Milita
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Electrical Characteristics unless o
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Functional Description* (Continued)
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,...A212AT RECEIVE FILTER p--------
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TABLE III. Remote Digital Loopback
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Section 6 Transmission Line Drivers
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~National ~ Semiconductor Transmiss
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~National ~ Semiconductor OS 1488 Q
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J?'A National ~ Semiconductor OS 14
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~National ~ Semiconductor DS26C31 C
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~National ~ Semiconductor DS26C32C
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~National ~ Semiconductor DS34C86 Q
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~National ~ Semiconductor PRELIMINA
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~National ~ Semiconductor DS1692/DS
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~National ~ Semiconductor DS75150 D
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~National ~ Semiconductor DS75176A/
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~National ~ Semiconductor DS8922/22
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~National ~ Semiconductor DS96172/~
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~National ~ Semiconductor DS961771
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~National ~ Semiconductor DS9637 AI
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• I .----------------------------
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Section 7 Physical Dimensions
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~National ~ Semiconductor All dimen
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NS Package N16A N16A(REV E) 0.092 X
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t-------------I:..':::~"':I'-------
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0.11M-0.118 (2.642-2.9971 .. ••
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NOTES
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~National ~ Semiconductor Bookshelf
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RELIABILITY HANDBOOK-1986 Reliabili
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NATIONAL SEMICONDUCTOR CORPORATION
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NATIONAL SEMICONDUCTOR CORPORATION
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