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SN74ABT843DW датащи(PDF) 1 Page - Texas Instruments

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номер детали SN74ABT843DW
подробное описание детали  9-BIT BUS-INTERFACE D-TYPE LATCHES WITH 3-STATE OUTPUTS
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производитель  TI1 [Texas Instruments]
домашняя страница  http://www.ti.com
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SN74ABT843DW датащи(HTML) 1 Page - Texas Instruments

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SN54ABT843, SN74ABT843
9-BIT BUS-INTERFACE D-TYPE LATCHES
WITH 3-STATE OUTPUTS
SCBS197D – FEBRUARY 1991 – REVISED MAY 1997
1
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
D State-of-the-Art EPIC-ΙΙB™ BiCMOS Design
Significantly Reduces Power Dissipation
D Latch-Up Performance Exceeds 500 mA Per
JEDEC Standard JESD-17
D Typical VOLP (Output Ground Bounce) < 1 V
at VCC = 5 V, TA = 25°C
D High-Drive Outputs (–32-mA IOH, 64-mA IOL)
D Package Options Include Plastic
Small-Outline (DW) and Shrink
Small-Outline (DB) Packages, Ceramic Chip
Carriers (FK), Ceramic Flat (W) Package,
and Plastic (NT) and Ceramic (JT) DIPs
description
The
’ABT843
9-bit
latches
are
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 nine transparent D-type latches provide true
data at the outputs.
A buffered output-enable (OE) input can be used
to place the nine outputs in either a normal logic
state
(high
or
low
logic
levels)
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 bus lines without
need for interface or pullup components.
OE does not affect the internal operations of the latch. Previously stored data can be retained or new data can
be entered while the outputs are in the high-impedance state.
To ensure the high-impedance state during power up or power down, OE should be tied to VCC through a pullup
resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.
The SN54ABT843 is characterized for operation over the full military temperature range of –55
°C to 125°C. The
SN74ABT843 is characterized for operation from –40
°C to 85°C.
Copyright
© 1997, Texas Instruments Incorporated
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-
ΙΙB is a trademark of Texas Instruments Incorporated.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
SN54ABT843 . . . JT OR W PACKAGE
SN74ABT843 . . . DB, DW, OR NT PACKAGE
(TOP VIEW)
SN54ABT843 . . . FK PACKAGE
(TOP VIEW)
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13
OE
1D
2D
3D
4D
5D
6D
7D
8D
9D
CLR
GND
VCC
1Q
2Q
3Q
4Q
5Q
6Q
7Q
8Q
9Q
PRE
LE
32 1 28 27
12 13
5
6
7
8
9
10
11
25
24
23
22
21
20
19
3Q
4Q
5Q
NC
6Q
7Q
8Q
3D
4D
5D
NC
6D
7D
8D
426
14 15 16 17 18
NC – No internal connection


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