Datasheet

SN74CB3T3245
SCDS136A –OCTOBER 2003–REVISED AUGUST 2012 www.ti.com
DESCRIPTION/ORDERING INFORMATION (CONTINUED)
Figure 1. Typical DC Voltage Translation Characteristics
The SN74CB3T3245 is an 8-bit bus switch with a single ouput-enable (OE) input and a standard '245 pinout.
When OE is low, the 8-bit 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 8-bit 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
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 V
CC
through a pullup
resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.
ORDERING INFORMATION
T
A
PACKAGE
(1)
ORDERABLE PART NUMBER TOP-SIDE MARKING
Tube SN74CB3T3245DW
SOIC – DW CB3T3245
Tape and reel SN74CB3T3245DWR
SSOP (QSOP) – DBQ Tape and reel SN74CB3T3245DBQR CB3T3245
–40°C to 85°C
Tube SN74CB3T3245PW
TSSOP – PW KS245
Tape and reel SN74CB3T3245PWR
TVSOP – DGV Tape and reel SN74CB3T3245DGVR KS245
(1) Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available at
www.ti.com/sc/package.
Table 1. FUNCTION TABLE
INPUT INPUT/OUTPUT
FUNCTION
OE A
L B A port = B port
H Z Disconnect
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