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Texas Instruments (TI) Electronic Components Datasheet

SN54BCT29826 Datasheet

8-Bit Bus-Interface Flip-Flops

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State-of-the-Art BiCMOS Design
Significantly Reduces ICCZ
ESD Protection Exceeds 2000 V Per
MIL-STD-883C, Method 3015; Exceeds
200 V Using Machine Model (C = 200 pF,
R = 0)
3-State Inverting Buffer-Type Outputs Drive
Bus Lines Directly
Package Options Include Plastic
Small-Outline (DW) Packages, Ceramic Chip
Carriers (FK) and Flatpacks (W), and
Standard Plastic and Ceramic 300-mil DIPs
(JT, NT)
description
These 8-bit bus-interface flip-flops feature 3-state
outputs designed specifically for driving highly
capacitive or relatively low-impedance loads.
They are particularly suitable for implementing
wider buffer registers, I/O ports, bidirectional bus
drivers with parity, and working registers.
The eight flip-flops are edge-triggered D-type
flip-flops. With the clock-enable (CLKEN) input
low, the device enters data on the low-to-high
transition of the clock. Taking CLKEN high
disables the clock buffer, thus latching the outputs.
Taking the clear (CLR) input low causes the eight
Q outputs to go low independently of the clock.
Buffered output-enable (OE1, OE2, or OE3)
inputs can be used to place the eight outputs in
either a normal logic state (high or low) or a
high-impedance state. In the high-impedance
state, the outputs neither load nor drive the bus
lines significantly. The high-impedance state and
increased drive provide the capability to drive bus
lines without need for interface or pullup
components.
The output-enable inputs do not affect the internal
operation of the flip-flops. Old data can be retained
or new data can be entered while the outputs are
in the high-impedance state.
The SN54BCT29826 is characterized for opera-
tion over the full military temperature range of
−55°C to 125°C. The SN74BCT29826 is
characterized for operation from 0°C to 70°C.
SN54BCT29826, SN74BCT29826
8ĆBIT BUSĆINTERFACE FLIPĆFLOPS
WITH 3ĆSTATE OUTPUTS
SCBS076A − NOVEMBER 1991 − REVISED NOVEMBER 1993
SN54BCT29826 . . . JT OR W PACKAGE
SN74BCT29826 . . . DW OR NT PACKAGE
(TOP VIEW)
OE1
OE2
1D
2D
3D
4D
5D
6D
7D
8D
CLR
GND
1
2
3
4
5
6
7
8
9
10
11
12
24 VCC
23 OE3
22 1Q
21 2Q
20 3Q
19 4Q
18 5Q
17 6Q
16 7Q
15 8Q
14 CLKEN
13 CLK
SN54BCT29826 . . . FK PACKAGE
(TOP VIEW)
4 3 2 1 28 27 26
2D 5
25 2Q
3D 6
24 3Q
4D 7
23 4Q
NC 8
22 NC
5D 9
21 5Q
6D 10
20 6Q
7D 11
19 7Q
12 13 14 15 16 17 18
NC − No internal connection
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
Copyright 1993, Texas Instruments Incorporated
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
POST OFFICE BOX 1443 HOUSTON, TEXAS 77251−1443
2−1


Texas Instruments (TI) Electronic Components Datasheet

SN54BCT29826 Datasheet

8-Bit Bus-Interface Flip-Flops

No Preview Available !

SN54BCT29826, SN74BCT29826
8ĆBIT BUSĆINTERFACE FLIPĆFLOPS
WITH 3ĆSTATE OUTPUTS
SCBS076A − NOVEMBER 1991 − REVISED NOVEMBER 1993
FUNCTION TABLE
INPUTS
OUTPUT
OE† CLR CLKEN CLK D
Q
L L X XX
L
LH L H
L
LH L L
H
LH
H H or L X
Q0
HX X XX
Z
OE = H if any of the output-enable inputs is high.
OE = L if all of the output-enable inputs are low.
logic symbol
OE1
OE2
OE3
CLR
CLKEN
CLK
1D
2D
3D
4D
5D
6D
7D
8D
1
2
23
11
14
13
3
4
5
6
7
8
9
10
&
EN
R
G1
1C2
2D
This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12.
Pin numbers shown are for the DW, JT, NT, and W packages.
22
1Q
21
2Q
20
3Q
19
4Q
18
5Q
17
6Q
16
7Q
15
8Q
2−2
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
POST OFFICE BOX 1443 HOUSTON, TEXAS 77251−1443


Part Number SN54BCT29826
Description 8-Bit Bus-Interface Flip-Flops
Maker Texas
Total Page 7 Pages
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