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5962-9324202QLA Datasheet

  • 5962-9324202QLA

  • OCTAL REGISTERED TRANSCEIVERS WITH 3-STATE OUTPUTS

  • 20頁

  • TI

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SN54ABT652A, SN74ABT652A
OCTAL REGISTERED TRANSCEIVERS
WITH 3-STATE OUTPUTS
SCBS072F 鈥?JANUARY 1991 鈥?REVISED MAY 1997
D
D
D
D
D
D
State-of-the-Art
EPIC-
螜螜
B
鈩?/div>
BiCMOS Design
Significantly Reduces Power Dissipation
ESD Protection Exceeds 2000 V Per
MIL-STD-883, Method 3015; Exceeds 200 V
Using Machine Model (C = 200 pF, R = 0)
Latch-Up Performance Exceeds 500 mA Per
JEDEC Standard JESD-17
Typical V
OLP
(Output Ground Bounce)
< 1 V at V
CC
= 5 V, T
A
= 25擄C
High-Drive Outputs (鈥?2-mA I
OH
, 64-mA I
OL
)
Package Options Include Plastic
Small-Outline (DW), Shrink Small-Outline
(DB), and Thin Shrink Small-Outline (PW)
Packages, Ceramic Chip Carriers (FK),
Ceramic Flat (W) Package, and Plastic (NT)
and Ceramic (JT) DIPs
SN54ABT652A . . . JT OR W PACKAGE
SN74ABT652A . . . DB, DW, NT, OR PW PACKAGE
(TOP VIEW)
CLKAB
SAB
OEAB
A1
A2
A3
A4
A5
A6
A7
A8
GND
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13
V
CC
CLKBA
SBA
OEBA
B1
B2
B3
B4
B5
B6
B7
B8
description
These devices consist of bus-transceiver circuits,
D-type flip-flops, and control circuitry arranged for
multiplexed transmission of data directly from the
data bus or from the internal storage registers.
Output-enable (OEAB and OEBA) inputs are
provided to control the transceiver functions.
Select-control (SAB and SBA) inputs are provided
to select either real-time or stored data for
transfer. The circuitry used for select control
eliminates the typical decoding glitch that occurs
in a multiplexer during the transition between
stored and real-time data. A low input selects
real-time data, and a high input selects stored
data. Figure 1 illustrates the four fundamental
bus-management functions that can be
performed with the 鈥橝BT652A.
SN54ABT652A . . . FK PACKAGE
(TOP VIEW)
OEAB
SAB
CLKAB
NC
V
CC
4
A1
A2
A2
NC
A4
A5
A6
5
6
7
8
9
10
3 2 1 28 27 26
25
24
23
22
21
20
CLKBA
SBA
OEBA
B1
B2
NC
B3
B4
B5
19
11
12 13 14 15 16 17 18
NC 鈥?No internal connection
Data on the A- or B-data bus, or both, can be stored in the internal D-type flip-flops by low-to-high transitions
at the appropriate clock (CLKAB or CLKBA) inputs, regardless of the select- or enable-control inputs. When SAB
and SBA are in the real-time transfer mode, it is possible to store data without using the internal D-type flip-flops
by simultaneously enabling OEAB and OEBA. In this configuration, each output reinforces its input. When all
other data sources to the two sets of bus lines are at high impedance, each set of bus lines remains at its last
state.
To ensure the high-impedance state during power up or power down, OEBA should be tied to V
CC
through a
pullup resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver
(B to A). OEAB should be tied to GND through a pulldown resistor; the minimum value of the resistor is
determined by the current-sourcing capability of the driver (A to B).
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.
EPIC-螜螜B is a trademark of 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.
POST OFFICE BOX 655303
鈥?/div>
DALLAS, TEXAS 75265
A7
A8
GND
NC
B8
B7
B6
Copyright
1997, Texas Instruments Incorporated
1

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