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TI882S1678
14 x 48 x 6 FIELD·PROGRAMMA8LE LOGIC SEOUENCER
WITH 3·STATE OUTPUTS OR PRESET
D2896, JANUARY 1985-REVISED JUNE 1986
• Programmable Asynchronous Preset or
Output Control
• Power·On Preset of All Flip·Flops
• 8·Bit Internal State Register with 4·Bit
Output Register
• Power Dissipation . . . 600 mW Typical
• Functionally Equivalent to, t but Faster than
82S167A
description
The TI882S1678 is a TTL field·programmable
state machine of the Mealy type. This state
machine (logic sequencer) contains 48 product
terms (AND terms) and 12 pairs of sum terms
(OR terms). The product and sum terms are used
to control the 8-bit internal state register and the
4-bit output register.
The outputs of the internal state register (PO-P7)
are fed back and combined with the 14 inputs
(10-113) toform the AND array. In addition the
first two bits of the internal state register (PO-P1)
are brought off-chip to allow the output register
to be extended to 6 bits if desired. 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 inputs
to the AND array.
The state and output registers are positive-edgetriggered
SIR flip-flops. These registers are
unconditionally preset high on power-up. PRE/OE
can be used as PRE to preset both registers or,
by blowing the proper fuse, be converted to an
output control function, OE.
The TI882S1678M is characterized for operation
over the full military temperature range of
- 55°C to 125°C. The TI882S1678C is
characterized for operation from 0 °C to 75°C.
M SUFFIX ... JT PACKAGE
C SUFFIX ... JT OR NT PACKAGE
(TOP VIEW)
VCC
)7
)8
19
110
111
11 112
113
PRE/DE
01 P1
02 PO
GND 03
M SUFFIX ... FK PACKAGE
C SUFFIX ... FK OR FN PACKAGE
ITOP VIEW)
4 3 2 1 28 2726
25 19
24 110
12 7 23 111
NC 8 22 NC
11 9 21 112
10 10 20 113
00 11 19 PRE/DE
12 1314 151617 18
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NC-No internal connection
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t Power up preset and asynchronous preset functions
are not identical to 828167 A.
PRODUCTION DATA documents contain information
current as of publication date. Products conform to
specifications per the terms of Texas Instruments
~~~~~~~~i~a{::ru1e ~~~:i~~ti~: fI~o::~:~:t:~s~s not
TEXAS •
INSTRUMENTS
POST OFFICE BOX 225012 • DALLAS. TEXAS 75265
Copyright © 1985, Texas Instruments Incorporated
3-135