SN74CB3Q3245_10 Datasheet, PDF (2/21 Pages) Texas Instruments – 8-BIT FET BUS SWITCH 2.5-V/3.3-V LOW-VOLTAGE HIGH-BANDWIDTH BUS SWITCH

SN74CB3Q3245
8-BIT FET BUS SWITCH
2.5-V/3.3-V LOW-VOLTAGE HIGH-BANDWIDTH BUS SWITCH
SCDS124B – JULY 2003 – REVISED MARCH 2005
www.ti.com
DESCRIPTION/ORDERING INFORMATION (CONTINUED)
The SN74CB3Q3245 is organized as an 8-bit bus switch with a single output-enable (OE) input. When OE is low,
the bus switch is ON and the A port is connected to the B port, allowing bidirectional data flow between ports.
When OE is high, the bus switch is OFF and a high-impedance state exists between the A and B ports.
This device is fully specified for partial-power-down applications using I_off. The I_off circuitry prevents damaging
current 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 V_CC through a pullup
resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.
T_A
–40°C to 85°C
ORDERING INFORMATION
PACKAGE ⁽¹⁾
ORDERABLE PART NUMBER
QFN – RGY
Tape and reel
SN74CB3Q3245RGYR
SSOP (QSOP) – DBQ
Tape and reel
SN74CB3Q3245DBQR
TSSOP – PW
Tube
Tape and reel
SN74CB3Q3245PW
SN74CB3Q3245PWR
TVSOP – DGV
Tape and reel
SN74CB3Q3245DGVR
VFBGA – GQN
Tape and reel
SN74CB3Q3245GQNR
TOP-SIDE MARKING
BU245
CB3Q3245
BU245
BU245
BU245
(1) Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available at
www.ti.com/sc/package.
GQN PACKAGE
(TOP VIEW)
1234
A
B
C
D
E
TERMINAL ASSIGNMENTS⁽¹⁾
1
2
3
4
A
A1
NC
V_CC
OE
B
A3
B2
A2
B1
C
A5
A4
B4
B3
D
A7
B6
A6
B5
E
GND
A8
B8
B7
(1) NC - No internal connection
INPUT
OE
L
H
FUNCTION TABLE
INPUT/OUTPUT
A
B
Z
FUNCTION
A port = B port
Disconnect
2