TheTTL - Al Kossow's Bitsavers

• Fastest Schottky PROM Family
• High-Speed Access Times
• Allows Storage of Output Data
• Titanium-Tungsten (Ti-W) Fuse Links for
Reliable low-Voltage Programming
• Choice of 16 Programmable Initialize Words
description
The TBP38R16 is a series-3 monolithic TTL
programmable read-only memory (PROM)
featuring high-speed access times and
dependable titanium-tungsten fuse link program
elements, It is organized as 2048 words by 8
bits, providing 16,384 bits.
The output register receives data from the PROM
array on the rising edge of ClK. The TBP38R16'
also contains 16 programmable initialization
words. Initialization words allow the outputs to
quickly be set to a predetermined value for start
up or time-out sequencing. These words are read
by taking the INIT pin low and pulsing the clock
(ClK) input line. When INIT is low, inputs AO-A3
select the desired initialization word
independently of A4-A 10. By programming all
sixteen words the same, initialization can be
achieved by taking INIT low independently of
AO-A3.
These PROMs are offered with a choice of setup
times (dash numbers). These dash numbers are
found in the recommended operating conditions
table, and are included in the part numbers.
TBP38R165, TBP38R16X
16,384-BIT (2048 WORDS BY 8 BITS) REGISTERED
PROGRAMMABLE READ-ONLY MEMORIES
TBP38R165 ... NT OR JT PACKAGE
(TOP VIEW)
A7
VCC
A6
A8
A5
A9
A4
A10
A3
iNiT
A2 G
A1
ClK
AO 07
00 06
01 05
02 04
GND 03
TBP38R16X ... FN OR FK PACKAGE
(TOP VIEW)
U
Ln(Or--UUCOo)
~~~z>~~
02902, OCTOBER 1985
4 3 2 1
A4
A10
A3
INIT
A2
G
A1
elK
AO
NC
NC 07
00 06
12 1314151617 18
.... NOUM'