TheTTL - Al Kossow's Bitsavers

TIBPALR19L8, TIBPALR19R4, TlBPALR19R6, TIBPALR19R8
HIGH·PERFORMANCE REGISTERED·INPUT PAL CIRCUITS
preload procedure for registered outputs (see Note 6)
Step 1
Step 2
Step 3
Step 4
Step 5
Step 6
Step 7
Pin 13 to VIH, Pin 1 to VIL, and VCC to 5 volts.
Pin 14 to VIHH
At Q outputs, apply VIL to preload a low and VIH to preload a high.
Pin .14 to VIL.
Remove the voltages applied to the outputs.
Pin 13 to VIL
Check the output states to verify preload.
preload waveforms (see Note 6)
vee
PIN 13 (DE)
5V --.-I
ov
VIH
VIL ----.If
OUTPUTS DISABLED
tdis~
~ten
V I ENABLE PRELOAD I
PIN '4 IINCLK, IHH - - - - - - : - - ~ \ :
1"'-----------
VIL I· I '-. --......;:~--------
I
I I ~tw1~ 100 ns -if+! VIH I
v I MIN I I : I VERIFY
Q V:~ XXXXXXXXX) I( ~"'-......;..;~--xm
secruity fuse programming (see Note 6)
Vee ~
J
VIL
Il:ll& 0 v
I ~tw3-.1 . :
~th"~ r---\.---------- -----,----- 16V
PIN 1 I V \ I OV
: I.-tW3..1 :
~th-+l }-----\j.th.J- - - -- 16 V
PIN 13 I 1/ \1 I 0 V
NOTE 6: Pin numbers shown are for JW and NT packages only. If chip carrier socket adapter is not used, pin numbers must be changed
accordingly.
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INSTRUMENTS
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