參數(shù)資料
型號: SN54ALS29825
廠商: Texas Instruments, Inc.
英文描述: 8-Bit Bus-Interface Flip-Flops With 3-State Outputs(8位總線接口觸發(fā)器(三態(tài)輸出))
中文描述: 8位總線接口觸發(fā)器以3正反器態(tài)輸出(8位總線接口觸發(fā)器(三態(tài)輸出))
文件頁數(shù): 1/9頁
文件大?。?/td> 77K
代理商: SN54ALS29825
SN54ALS29825, SN74ALS29825, SN74ALS29826
8-BIT BUS INTERFACE FLIP-FLOPS WITH 3-STATE OUTPUTS
SDAS147B — JANUARY 1986 — REVISED MARCH 1990
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
1
Copyright
1991, Texas Instruments Incorporated
PRODUCTION DATA information is current as of
publication date. Products conform to specifications
per the terms of Texaprocessing
Production
necessarily include testing of all parameters.
does
not
Functionally Equivalent to AMD AM29825
and AM29826
Improved I
OH
Specifications
Multiple Output Enables Allow Multiuser
Control of the Interface
Outputs Have Undershoot Protection
Circuitry
Power-Up High-Impedance State
Package Options Include Plastic
“Small-Outline” Packages and Standard
Plastic and Ceramic 300-mil DIPs
Buffered Control Inputs to Reduce DC
Loading Effect
description
These 8-bit flip-flops feature three-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) low, the eight
D-type edge-triggered flip-flops enter data on the
low-to- high transitions of the clock. Taking
CLKEN high will disable the clock buffer, thus
latching the outputs. The
ALS29825 has
noninverting D inputs and the
ALS29826 has
inverting D inputs. Taking the CLR input low
causes the eight Q outputs to go low independent-
ly of the clock.
Multiuser buffered output-control inputs (OC1, OC2, and OC3) can be used to place the eight outputs in either
a normal logic state (high or low level) or a high-impedance state. The outputs are also in the high-impedance
state during power-up and power-down conditions. The outputs remain in the high-impedance state while the
device is powered-down. 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 the bus lines in a
bus-organized system without need for interface or pullup components. The output controls 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 SN54ALS29825 is characterized over the full military range of – 55
°
C to 125
°
C. The SN74ALS29825 and
SN74ALS29826 are characterized for operation from 0
°
C to 70
°
C.
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OC1
OC2
1D
2D
3D
4D
5D
6D
7D
8D
CLR
GND
VCC
OC3
1Q
2Q
3Q
4Q
5Q
6Q
7Q
8Q
CLKEN
CLK
(TOP VIEW)
SN54ALS29825 . . . JT PACKAGE
SN74ALS29825 . . . DW OR NT PACKAGE
SN74ALS29826 . . . DW OR NT PACKAGE
(TOP VIEW)
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OC1
OC2
1D
2D
3D
4D
5D
6D
7D
8D
CLR
GND
VCC
OC3
1Q
2Q
3Q
4Q
5Q
6Q
7Q
8Q
CLKEN
CLK
相關(guān)PDF資料
PDF描述
SN54ALS29843 9-Bit Bus-Interface Flip-Flops With 3-State Outputs(9位總線接口D鎖存器(三態(tài)輸出))
SN54ALS299FK 8-BIT UNIVERSAL SHIFT/STORAGE REGISTERS WITH 3-STATE OUTPUTS
SN54ALS323FK 8-BIT UNIVERSAL SHIFT/STORAGE REGISTERS WITH SYNCHRONOUS CLEAR AND 3-STATE OUTPUTS
SN74ALS323DW 8-BIT UNIVERSAL SHIFT/STORAGE REGISTERS WITH SYNCHRONOUS CLEAR AND 3-STATE OUTPUTS
SN54ALS323J 8-BIT UNIVERSAL SHIFT/STORAGE REGISTERS WITH SYNCHRONOUS CLEAR AND 3-STATE OUTPUTS
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