參數(shù)資料
型號： SN54BCT374J
廠商： Texas Instruments, Inc.
英文描述： OCTAL EDGE-TRIGGERED D-TYPE FLIP-FLOPS WITH 3-STATE OUTPUTS
中文描述： 八路邊沿觸發(fā)的D型倒裝3觸發(fā)器態(tài)輸出
文件頁數(shù)： 1/5頁
文件大小： 74K
代理商： SN54BCT374J
SN54BCT374, SN74BCT374
OCTAL EDGE-TRIGGERED D-TYPE FLIP-FLOPS
WITH 3-STATE OUTPUTS
SCBS019B – SEPTEMBER 1988 – REVISED APRIL 1994
Copyright
1994, Texas Instruments Incorporated
2–1
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
State-of-the-Art BiCMOS Design
Significantly Reduces I
CC
Full Parallel Access for Loading
Buffered Control Inputs
3-State True Outputs Drive Bus Lines
or Buffer Memory Address Registers
ESD Protection Exceeds 2000 V
Per MIL-Std-883C, Method 3015
Package Options Include Plastic
Small-Outline (DW) and Shrink
Small-Outline (DB) Packages, Ceramic Chip
Carriers (FK) and Flatpacks (W), and
Standard Plastic and Ceramic 300-mil DIPs
(J, N)
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
′
BCT374 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. 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 SN54BCT374 is characterized for operation over the full military temperature range of –55
°
C to 125
°
C. The
SN74BCT374 is characterized for operation from 0
°
C to 70
°
C.
FUNCTION TABLE
(each flip-flop)
INPUTS
OUTPUT
Q
OE
L
CLK
↑
↑
H or L
D
H
H
L
L
L
L
X
Q0
Z
H
X
X
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
OE
1Q
1D
2D
2Q
3Q
3D
4D
4Q
GND
V
CC
8Q
8D
7D
7Q
6Q
6D
5D
5Q
CLK
SN54BCT374 . . . J OR W PACKAGE
SN74BCT374 . . . DB OR DW OR N PACKAGE
(TOP VIEW)
3
2
1 20 19
9 10 11 12 13
4
5
6
7
8
18
17
16
15
14
2D
2Q
3Q
3D
4D
SN54BCT374 . . . FK PACKAGE
(TOP VIEW)
1
1
O
5
5
8
4
G
C
V
C
8D
7D
7Q
6Q
6D
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.
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