TIB82S105BC
16 × 48 × 8 FIELD-PROGRAMMABLE LOGIC SEQUENCER
WITH 3-STATE OUTPUTS OR PRESET
SRPS025A – D2897, SEPTEMBER 1985 – REVISED NOVEMBER 1995
N PACKAGE
(TOP VIEW)
•
•
•
50-MHz Clock Rate
Power-On Preset of All Flip-Flops
CLK
I7
V
CC
I8
I9
I10
I11
I12
I13
I14
I15
PRE/OE
Q0
Q1
Q2
Q3
1
28
27
26
25
24
23
22
21
20
19
18
17
16
15
6-Bit Internal State Register With 8-Bit
Output Register
2
I6
I5
I4
I3
I2
I1
I0
3
•
•
Power Dissipation . . . 600 mW Typical
4
5
Programmable Asynchronous Preset or
Output Control
6
7
•
Functionally Equivalent to, but Faster Than
8
†
82S105A
9
Q7
Q6
Q5
Q4
GND
10
11
12
13
14
description
The TIB82S105BC is a TTL field-programmable
state machine of the Mealy type. This state
machine (logic sequencer) contains 48 product
terms (AND terms) and 14 pairs of sum terms (OR
terms). The product and sum terms are used to
control the 6-bit internal state register and the 8-bit
output register.
FN PACKAGE
(TOP VIEW)
The outputs of the internal state register (P0–P5)
are fed back and combined with the 16 inputs
(I0–I15) to form the AND array. In addition a single
sum term is complemented and fed back to the
AND array, which allows any of the product terms
to be summed, complemented, and used as an
input to the AND array.
4
5
3 2 1 28 27 26
I4
I3
I2
I1
I0
I10
I11
I12
25
24
23
6
7
8
22 I13
21 I14
20 I15
19 PRE/OE
9
10
11
Q7
Q6
The state and output registers are positive-edge-
triggered S/R flip-flops. These registers are
unconditionally preset high during power up.
Pin19 can be used to preset both registers or, by
blowing the proper fuse, be converted to an output
control function.
12 13 14 15 16 17 18
The TIB82S105BC is characterized for operation
from 0°C to 75°C.
† Power-up preset and asynchronous preset functions are not identical to 82S105A. See Recommended Operating Conditions.
PRODUCTION DATA information is current as of publication date.
Copyright 1995, Texas Instruments Incorporated
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
1