SN54BCT534 Datasheet, PDF (1/7 Pages) Texas Instruments – OCTAL EDGE-TRIGGERED D-TYPE FLIP-FLOPS WITH 3-STATE OUTPUTS

• State-of-the-Art BiCMOS Design
Significantly Reduces I_CCZ
• Full Parallel Access for Loading
• Buffered Control Inputs
• 3-State Bus-Driving Inverted Outputs
• ESD Protection Exceeds 2000 V
Per MIL-STD-883C, Method 3015
• Package Options Include Plastic
Small-Outline (DW) Packages, Ceramic
Chip Carriers (FK) and Flatpacks (W), and
Plastic and Ceramic 300-mil DIPs (J, N)
description
SN54BCT534, SN74BCT534
OCTAL EDGE-TRIGGERED D-TYPE FLIP-FLOPS
WITH 3-STATE OUTPUTS
SCBS033B – AUGUST 1989 – REVISED NOVEMBER 1993
SN54BCT534 . . . J OR W PACKAGE
SN74BCT534 . . . DW OR N PACKAGE
(TOP VIEW)
OE ₁
1Q ₂
1D ₃
2D ₄
2Q ₅
3Q 6
3D 7
4D 8
4Q 9
GND 10
20 ^V_CC
19 ^8Q
18 ^8D
17 ^7D
16 ^7Q
15 6Q
14 6D
13 5D
12 5Q
11 CLK
The ′BCT534 is an 8-bit flip-flop with 3-state
outputs designed specifically for driving highly
capacitive or relatively low-impedance loads. It is
particularly suitable for implementing buffer
registers, I/O ports, bidirectional bus drivers, and
working registers.
The eight flip-flops of the ′BCT534 are
edge-triggered D-type flip-flops. On the positive
transition of the clock, the Q outputs will be set to
the complement of the logic levels that were set up
at the data (D) inputs. The ′BCT534 provides
inverted data at its outputs.
SN54BCT534 . . . FK PACKAGE
(TOP VIEW)
2D
3 2 1 20 19
4
18
8D
2Q ₅
17 ^7D
3Q 6
16 7Q
3D 7
15 6Q
4D 8
14 6D
9 10 11 12 13
A buffered output-enable (OE) input can be used
to place the eight outputs in either a normal logic
state (high or low logic levels) or a high-imped-
ance state. In the high-impedance state, the
outputs neither load nor drive the bus lines
significantly. The high-impedance state and the
increased drive provide the capability to drive bus
lines without need for interface or pullup
components.
The output-enable (OE) input does not affect the internal operations of the flip-flop. Previously stored data can
be retained or new data can be entered while the outputs are in the high-impedance state.
The SN54BCT534 is characterized for operation over the full military temperature range of – 55°C to 125°C. The
SN74BCT534 is characterized for operation from 0°C to 70°C.
FUNCTION TABLE
(each flip-flop)
INPUTS
OE CLK D
L
↑
H
L
↑
L
L H or L X
H
X
X
OUTPUT
Q
L
H
Q0
Z
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.
• POST OFFICE BOX 655303 DALLAS, TEXAS 75265
Copyright © 1993, Texas Instruments Incorporated
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