TheTTL - Al Kossow's Bitsavers

TBP38L165, TBP38L166, TBP38L16X
16,384-BI1 (2048 WORDS BY 8 BITS) LOW-POWER
PROGRAMMABLE READ-ONLY MEMORY WITH 3-STATE OUTPUTS
AOTOA10J VALID ADDRESS
:
Vee
G
I ~tw1 ~tw2 ~tw3
I I I I I
I
I
~ j4- t h(en)
I
I
I
01
n 1
I :
02 I
I
I
I
07
I
I
I
I
I
I
~
I
>C
j4-tt-tw1
I I ------ 12.5V
PROGRAM 02
~ } ~ ~I
PROGRAM 07
I
-----5V
OV
L VOH
VOL
- VOH
VOL
VOH
L VOL
Illustrated above is the following sequence:
"::xl
o
S
en
1) It is desired to program the selected address with 0110000 1 (00-Q7). Only outputs Q 1 . Q2 and Q7 need programming.
2) Q 1 is verified to be at a low logic level and then the programming sequence is executed. The output is then verified to be at a high
logic level.
3) Q2 is an example of an output requiring three attempts to be programmed successfully.
4) Q7 is programmed to a high logic level.
FIGURE 1. SERIES 3 PROGRAMMING SEQUENCE
4-82 TEXAS -I.!}
INSTRUMENTS
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