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SN74CBT3253C Datasheet Preview

SN74CBT3253C Datasheet

DUAL 1-OF-4 FET MULTIPLEXER/DEMULTIPLEXER

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www.ti.com
SN74CBT3253C
DUAL 1-OF-4 FET MULTIPLEXER/DEMULTIPLEXER
5-V BUS SWITCH WITH –2-V UNDERSHOOT PROTECTION
SCDS123B – JULY 2003 – REVISED JANUARY 2007
FEATURES
SN74CBT3253C Functionally Identical to
Industry-Standard ’3253 Function
Undershoot Protection for Off-Isolation on A
and B Ports up to –2 V
Bidirectional Data Flow, With Near-Zero
Propagation Delay
Low ON-State Resistance (ron) Characteristics
(ron = 3 Typical)
Low Input/Output Capacitance Minimizes
Loading and Signal Distortion
(Cio(OFF) = 5.5 pF Typical)
Data and Control Inputs Provide Undershoot
Clamp Diodes
Low Power Consumption (ICC = 3 µA Max)
VCC Operating Range From 4 V to 5.5 V
Data I/Os Support 0 to 5-V Signaling Levels
(0.8 V, 1.2 V, 1.5 V, 1.8 V, 2.5 V, 3.3 V, 5 V)
Control Inputs Can Be Driven by TTL or
5-V/3.3-V CMOS Outputs
Ioff Supports Partial-Power-Down Mode
Operation
Latch-Up Performance Exceeds 100 mA Per
JESD 78, Class II
ESD Performance Tested Per JESD 22
– 2000-V Human-Body Model
(A114-B, Class II)
– 1000-V Charged-Device Model (C101)
Supports I2C Bus Expansion
Supports Both Digital and Analog
Applications: USB Interface, Bus Isolation,
Low-Distortion Signal Gating
DESCRIPTION/ORDERING INFORMATION
The SN74CBT3253C is a high-speed TTL-compatible FET multiplexer/demultiplexer with low ON-state
resistance (ron), allowing for minimal propagation delay. Active Undershoot-Protection Circuitry on the A and B
ports of the SN74CBT3253C provides protection for undershoot up to –2 V by sensing an undershoot event and
ensuring that the switch remains in the proper OFF state.
The SN74CBT3253C is organized as two 1-of-4 multiplexer/demultiplexers with separate output-enable (1OE,
2OE) inputs. The select (S0, S1) inputs control the data path of each multiplexer/demultiplexer. When OE is low,
the associated multiplexer/demultiplexer is enabled, and the A port is connected to the B port, allowing
bidirectional data flow between ports. When OE is high, the associated multiplexer/demultiplexer is disabled, and
a high-impedance state exists between the A and B ports.
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.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2003–2007, Texas Instruments Incorporated




etcTI

SN74CBT3253C Datasheet Preview

SN74CBT3253C Datasheet

DUAL 1-OF-4 FET MULTIPLEXER/DEMULTIPLEXER

No Preview Available !

SN74CBT3253C
DUAL 1-OF-4 FET MULTIPLEXER/DEMULTIPLEXER
5-V BUS SWITCH WITH –2-V UNDERSHOOT PROTECTION
SCDS123B – JULY 2003 – REVISED JANUARY 2007
www.ti.com
DESCRIPTION/ORDERING INFORMATION (CONTINUED)
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.
TA
–40°C to 85°C
ORDERING INFORMATION
PACKAGE (1)
ORDERABLE PART NUMBER
TOP-SIDE MARKING
QFN – RGY
Reel of 1000
SN74CBT3253CRGYR
CU253C
SOIC – D
Tube of 40
Reel of 2500
SN74CBT3253CD
SN74CBT3253CDR
CBT3253C
SSOP – DB
Tube of 80
Reel of 2000
SN74CBT3253CDB
SN74CBT3253CDBR
CU253C
SSOP (QSOP) – DBQ Reel of 2500
SN74CBT3253CDBQR
CU253C
TSSOP – PW
Tube of 90
Reel of 2000
SN74CBT3253CPW
SN74CBT3253CPWR
CU253C
(1) Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available at
www.ti.com/sc/package.
FUNCTION TABLE
(each multiplexer/demultiplexer)
INPUTS
OE
S1
S0
L
L
L
L
L
H
L
H
L
L
H
H
H
X
X
INPUT/OUTPUT
A
B1
B2
B3
B4
X
FUNCTION
A port = B1 port
A port = B2 port
A port = B3 port
A port = B4 port
Disconnect
2
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Part Number SN74CBT3253C
Description DUAL 1-OF-4 FET MULTIPLEXER/DEMULTIPLEXER
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