SN74CBTLV3245A
LOW-VOLTAGE OCTAL FET BUS SWITCH
www.ti.com
SCDS034L–JULY 1997–REVISED MARCH 2005
FEATURES
•
•
Latch-Up Performance Exceeds 250 mA Per
JESD 17
•
•
•
•
Standard '245-Type Pinout
ESD Protection Exceeds JESD 22
– 2000-V Human-Body Model (A114-A)
– 200-V Machine Model (A115-A)
5-Ω Switch Connection Between Two Ports
Rail-to-Rail Switching on Data I/O Ports
Ioff Supports Partial-Power-Down Mode
Operation
DBQ, DGV, DW, OR PW PACKAGE
(TOP VIEW)
RGY PACKAGE
(TOP VIEW)
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
NC
A1
A2
V
CC
OE
B1
B2
B3
B4
B5
B6
B7
B8
1
20
19
18
17
16
15
14
13
12
2
3
4
5
6
7
8
9
A1
A2
A3
A4
A5
A6
A7
A8
OE
B1
B2
B3
B4
B5
B6
B7
A3
A4
A5
A6
A7
A8
GND
10
11
NC - No internal connection
NC - No internal connection
DESCRIPTION/ORDERING INFORMATION
The SN74CBTLV3245A provides eight bits of high-speed bus switching in a standard '245 device pinout. The low
on-state resistance of the switch allows connections to be made with minimal propagation delay.
The device is organized as one 8-bit switch. When output enable (OE) is low, the 8-bit bus switch is on, and port
A is connected to port B. When OE is high, the switch is open, and the high-impedance state exists between the
two ports.
This device is fully specified for partial-power-down applications using Ioff. The Ioff feature ensures that damaging
current will not backflow through the device when it is powered down. The device has isolation during power off.
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.
ORDERING INFORMATION
TA
PACKAGE(1)
ORDERABLE PART NUMBER
SN74CBTLV3245ARGYR
SN74CBTLV3245ADW
TOP-SIDE MARKING
QFN – RGY
SOIC – DW
Tape and reel
CL245A
Tube
CBTLV3245A
Tape and reel
Tape and reel
Tape and reel
Tape and reel
SN74CBTLV3245ADWR
SN74CBTLV3245ADBQR
SN74CBTLV3245APWR
SN74CBTLV3245ADGVR
–40°C to 85°C
SSOP (QSOP) – DBQ
TSSOP – PW
CBTLV3245A
CL245A
TVSOP – DGV
CL245A
(1) Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available at
www.ti.com/sc/package.
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.
PRODUCTION DATA information is current as of publication date.
Copyright © 1997–2005, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.