~ National ~ Semiconductor - Al Kossow's Bitsavers

Timing Characteristics (Continued)
Vee = 5V ± 5%, T A = O'C to 70'C, Oscillator Frequency = 28 MHz (Notes 2 and 3)
Symbol Parameter Conditions Min Typ Max Units
Data Rate Frequency
(Clock Input must be 8 x this Frequency)
DC
3.5 Mbits/s
Input Capacitance-Any Input (Note 4) 5 15 pF
Note 1: "Absolute Maximum Ratings" are those values beyond which the safety 01 the device cannot be guaranteed. They are not meant to imply that the device
should be operated at these limits. The table of "Electrical Characteristics" provides conditions for actual device operation.
Note 2: Unless otherwise specified, minimax limits apply across the aoc to + 70"e temperature range and the 4.75V to 5.25V power supply range. All typical
values are for T A ~ 25'C and Vee ~ 5.0V.
Note 3: All currents into device pins are shown as positive; aU currents out of device pins are shown as negative; all voltages are referenced to ground, unless
otherwise specified. All values shown as max or min are so classified on absolute basis.
Note 4: Input capacitance is guaranteed by periodic testing. fTEST = 10 kHz at 300 mY, TA = 25°C.
Note 5: Only one output should be shorted at a time.
Note 6: T ~ I/(Oscillator Frequency). Unit for T should be in ns. B ~ ST.
Note 7: Oscillator Frequency Dependent.
C
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co
W
N
...... ""
Z
rn
w
N
N
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-:\'---4 Timing Waveforms (Continued)
-r-t-Pdt---::---:'~-_-;'
_______ -:-_-J.
--l
VOL
~tPd2 *tPd3~ VOH
REG FULL --= 5011
BYTE CLOCK ---------------' -~- 114= ;
~I 12 :~V
REG LOAD Y
" l t ..· -=c:, /I
REG FULL
_____ J
n
rl~
-;;-..
__ ~I' -\ _ tpd17 "\ 5011 VDL
_ _ tpd2 tPd3-11=
'-____
-SOIlVOH
.1 _ tpw3 VOL
- _tpw2 tpdl8- -- --j l~~l-
BYTECLK ______________ ..,/'{' ~ ~::
-- -tpw5
FIGURE 6. Single Byte Transfer
TLlF/5236-7
FIGURE 7. Two-Byte Transfer
TL/F/5236-B
REG FULL
~I\MI
~!1==' 1t~
WINDOW
~ TO LOAD MULTI·BYTE DATA ......
15"'xl
3V
VOH
VOL
FIGURE 8. Maximum Window to Load Multi-Byte Data
TL/F/5236-9
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