SN74CB3T3245 Datasheet, PDF (2/14 Pages) Texas Instruments – 8-BIT FET BUS SWITCH 2.5-V/3.3-V LOW-VOLTAGE BUS SWTCH WITH 5-V-TOLERANK LEVEL SHIFTER

SN74CB3T3245
8-BIT FET BUS SWITCH
2.5-V/3.3-V LOW-VOLTAGE WITH 5-V-TOLERANT LEVEL SHIFTER
SCDS136 – OCTOBER 2003 – REVISED MARCH 2005
DESCRIPTION/ORDERING INFORMATION (CONTINUED)
V_CC
www.ti.com
5.5 V
V_CC
9V_CC − 1 V
IN
OUT
CB3T
9V_CC
9V_CC − 1 V
0V
0V
Input Voltages
Output Voltages
NOTE A: If the input high-voltage (V_IH) level is greater than or equal to (V_CC − 1 V) and less than or equal to 5.5 V,
then the output high-voltage (V_OH) level will be equal to approximately the V_CC voltage level.
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.
T_A
–40°C to 85°C
ORDERING INFORMATION
PACKAGE ⁽¹⁾
ORDERABLE PART NUMBER
SOIC – DW
Tube
Tape and reel
SN74CB3T3245DW
SN74CB3T3245DWR
SSOP (QSOP) – DBQ Tape and reel SN74CB3T3245DBQR
TSSOP – PW
Tube
Tape and reel
SN74CB3T3245PW
SN74CB3T3245PWR
TVSOP – DGV
Tape and reel SN74CB3T3245DGVR
TOP-SIDE MARKING
CB3T3245
CB3T3245
KS245
KS245
(1) Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available at
www.ti.com/sc/package.
INPUT
OE
L
H
FUNCTION TABLE
INPUT/OUTPUT
A
B
Z
FUNCTION
A port = B port
Disconnect
2