SN74CBT3125
QUADRUPLE FET BUS SWITCH
SCDS021I − MAY 1995 − REVISED SEPTEMBER 2002
D
Standard ’125-Type Pinout (D, DB, DGV,
and PW Packages)
D
D
5-Ω Switch Connection Between Two Ports
TTL-Compatible Input Levels
D, DB, DGV, OR PW PACKAGE
(TOP VIEW)
DBQ PACKAGE
(TOP VIEW)
RGY PACKAGE
(TOP VIEW)
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
VCC
4OE
4A
4B
3OE
3A
NC
1OE
1A
1B
2OE
2A
1OE
1A
1B
2OE
2A
2B
VCC
1
2
3
4
5
6
7
14
13 4OE
12 4A
11 4B
1
14
1A
1B
2OE
2A
13 4OE
12 4A
2
3
4
5
6
10
9
3OE
3A
3B
11
10
9
4B
3OE
3A
3B
NC
8
2B
GND
GND
2B
7
8
NC − No internal connection
description/ordering information
The SN74CBT3125 quadruple FET bus switch features independent line switches. Each switch is disabled
when the associated output-enable (OE) input is high.
To ensure the high-impedance state during power up or power down, OE should be tied to V through a pullup
CC
resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.
ORDERING INFORMATION
ORDERABLE
PART NUMBER
TOP-SIDE
MARKING
†
T
A
PACKAGE
QFN − RGY
Tape and reel
SN74CBT3125RGYR
SN74CBT3125D
CU125
Tube
SOIC − D
CBT3125
Tape and reel
Tape and reel
SN74CBT3125DR
SN74CBT3125DBR
SN74CBT3125DBQR
SN74CBT3125PWR
SN74CBT3125DGVR
SSOP − DB
CU125
CU125
CU125
CU125
−40°C to 85°C
SSOP (QSOP) − DBQ Tape and reel
TSSOP − PW
TVSOP − DGV
Tape and reel
Tape and reel
†
Package drawings, standard packing quantities, thermal data, symbolization, and PCB design
guidelines are available at www.ti.com/sc/package.
FUNCTION TABLE
(each bus switch)
INPUT
FUNCTION
OE
L
A port = B port
Disconnect
H
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.
Copyright © 2002, 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.
1
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