TheTTL - Al Kossow's Bitsavers

PAL20L8A, PAL20R4A, PAL20R6A, PAL20R8A
STANDARD HIGH SPEED PAL CIRCUITS
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Supply voltage, Vee (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 7 V
Input voltage (see Note 1) ................................................. " 5.5 V
Voltage applied to a disabled output (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 5.5 V
Operating free-air temperature range: M suffix. . . . . . . . . . . . . . . . . . . . . . . . . .. - 55 DC to 125 DC
e suffix .............................. 0 DC to 70 DC
Storage temperature range ......................................... - 65 DC to 150 DC
NOTE 1: These ratings apply except for programming pins during a programming cycle.
recommended operating conditions
PARAMETER
M SUFFIX
C SUFFIX
MIN NOM MAX MIN NOM MAX
Vee Supply voltage 4.5 5 5.5 4.75 5 5.25 V
VIH High-level input voltage 2 5.5 2 5.5 V
Vil low-level input voltage 0.8 0.8 V
10H High-level output current -2 -3.2 mA
10l low-level output current 12 24 mA
TA Operating free-air temperature -55 125 0 70 °e
programming parameters, T A
UNIT
MIN NOM MAX UNIT
Vee Verify-level supply voltage 4.5 5.0 5.5 V
VIH High-level input voltage 2 5.5 V
Vil low-level input voltage 0.8 v
VIHH Program-pulse input voltage 10.25 10.5 10.75 V
PO 20 50
PGM ENABLE, L/R 10 25
IiHH Program-pulse input current mA
PI, PA 1.5 5
Vee 250 400
tw1 Program-pulse duration at PO pins 10 50 /LS
tw2 Pulse duration at PGM VERIFY 100 ns
Program-pulse duty cycle at PO pins 25 %
tsu Setup time 100 ns
th Hold time 100 ns
td1 Delay time from Vee to 5 V to PGM VERIFYt 100 /Ls
td2 Delay time from PGM VERIFYt to valid output 200 ns
Input voltage at pins 1 and 11 to open verify-protect (security) fuse 20 21 22 V
Input current to open verify-protect (security) fuse 400 mA
tw3 Pulse duration to open verify-protect (security) fuse 20 50 /LS
Vee value during security fuse programming 0 0.4 V
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INSTRUMENTS
POST OFFICE BOX 225012 • DALLAS. TEXAS 75265
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