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74ACT11825 Datasheet(PDF) 1 Page - Texas Instruments

Part No. 74ACT11825
Description  8-BIT BUS-INTERFACE FLIP-FLOP
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

74ACT11825 Datasheet(HTML) 1 Page - Texas Instruments

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74ACT11825
8BIT BUSINTERFACE FLIPFLOP
WITH 3STATE OUTPUTS
SCAS154A − D3715, NOVEMBER 1990 − REVISED APRIL 1993
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
POST OFFICE BOX 1443
HOUSTON, TEXAS 77001
Copyright
1993, Texas Instruments Incorporated
2−1
Inputs Are TTL-Voltage Compatible
Multiple Output Enables Allow Multiuser
Control of the Interface
Flow-Through Architecture Optimizes
PCB Layout
Center-Pin V
CC and GND Configurations
Minimize High-Speed Switching Noise
EPIC (Enhanced-Performance Implanted
CMOS) 1-
µm Process
500-mA Typical Latch-Up Immunity at 125°C
description
This device contains eight flip-flops that feature
3-state outputs designed specifically for driving
highly-capacitive or relatively low-impedance
loads.
They
are
particularly
suitable
for
implementing multiuser registers, I/O ports,
bidirectional bus drivers, and working registers.
With the clock-enable (CLKEN) input low, the eight edge-triggered D-type flip-flops enter data on the low-to-high
transition of the clock. Taking CLKEN high disables the clock buffer, thus latching the outputs. The 74ACT11825
has noninverting data (D) inputs. Taking the clear (CLR) input low causes the eight Q outputs to go low
independently of the clock.
Multiuser buffered output-enable (OE1, OE2, and OE3) inputs can be used to place the eight outputs in either
a normal logic state (high or low logic level) 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 (OE) does 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 74ACT11825 is characterized for operation from − 40
°C to 85°C.
FUNCTION TABLE
INPUTS
OUTPUT
OE†
CLR
CLKEN
CLK
D
OUTPUT
Q
L
L
X
X
X
L
L
HL
HH
L
HL
LL
L
HH
X
X
Q0
H
X
X
X
X
Z
† OE = H if any of OE1, OE2, or OE3 are high.
OE = L if all of OE1, OE2, or OE3 are low.
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.
EPIC is a trademark of Texas Instruments Incorporated.
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25
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17
16
15
OE1
1Q
2Q
3Q
4Q
GND
GND
GND
GND
5Q
6Q
7Q
8Q
CLR
OE2
OE3
1D
2D
3D
4D
VCC
VCC
5D
6D
7D
8D
CLKEN
CLK
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