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JM38510/34105B2A Datasheet

  • JM38510/34105B2A

  • Texas Instruments [OCTAL EDGE-TRIGGERED D-TYPE FLIP-FLOPS W...

  • 689.50KB

  • TI

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SN54F374, SN74F374
OCTAL EDGE TRIGGERED D TYPE FLIP FLOPS
WITH 3 STATE OUTPUTS
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
Eight D-Type Flip-Flops in a Single Package
3-State Bus-Driving True Outputs
Full Parallel Access for Loading
Buffered Control Inputs
Package Options Include Plastic
Small-Outline (SOIC) and Shrink
Small-Outline (SSOP) Packages, Ceramic
Chip Carriers, and Plastic and Ceramic
DIPs
SN54F374 . . . J PACKAGE
SN74F374 . . . DB, DW, OR N PACKAGE
(TOP VIEW)
SDFS077A 鈭?D2932, MARCH 1987 鈭?REVISED OCTOBER 1993
description
These 8-bit flip-flops feature 3-state outputs
designed specifically for driving highly capacitive
or relatively low-impedance loads. They are
particularly suitable for implementing buffer
registers, I/O ports, bidirectional bus drivers, and
working registers.
The eight flip-flops of the
鈥睩374
are edge-triggered
D-type flip-flops. On the positive transition of the
clock (CLK) input, the Q outputs are set to the logic
levels that were set up at the data (D) inputs.
A buffered output enable (OE) input 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 the increased drive
provide the capability to drive bus lines without
need for interface or pullup components.
2D
2Q
3Q
3D
4D
OE
1Q
1D
2D
2Q
3Q
3D
4D
4Q
GND
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
V
CC
8Q
8D
7D
7Q
6Q
6D
5D
5Q
CLK
SN54F374 . . . FK PACKAGE
(TOP VIEW)
1D
1Q
OE
V
CC
4
5
6
7
8
3 2 1 20 19
18
17
16
15
14
9 10 11 12 13
8Q
8D
7D
7Q
6Q
6D
The output enable (OE) input does not affect internal operations of the flip-flop. Old data can be retained or new
data can be entered while the outputs are in the high-impedance state.
The SN74F374 is available in TI鈥檚 shrink small-outline package (DB), which provides the same I/O pin count
and functionality of standard small-outline packages in less than half the printed-circuit-board area.
The SN54F374 is characterized for operation over the full military temperature range of 鈭?5擄C to 125擄C. The
SN74F374 is characterized for operation from 0擄C to 70擄C.
FUNCTION TABLE
(each flip-flop)
INPUTS
OE
L
L
L
H
CLK
鈫?/div>
鈫?/div>
H or L
X
D
H
L
X
X
OUTPUT
Q
H
L
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
鈥?/div>
DALLAS, TEXAS 75265
4Q
GND
CLK
5Q
5D
Copyright
錚?/div>
1993, Texas Instruments Incorporated
2鈭?

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