SN74CBT3253C Series

5-V, 4:1, 2-channel FET bus switch with –2-V undershoot protection

Catalog

5-V, 4:1, 2-channel FET bus switch with –2-V undershoot protection

Part	Mounting Type	Circuit [custom]	Circuit [custom]	Type	Package / Case [x]	Package / Case	Package / Case [y]	Voltage Supply Source	Operating Temperature [Max]	Operating Temperature [Min]	Independent Circuits	Supplier Device Package	Voltage - Supply [Min]	Voltage - Supply [Max]	Package / Case	Package / Case
Texas Instruments SN74CBT3253CPWR	Surface Mount	2	4:1	Multiplexer/Demultiplexer	0.173 in	16-TSSOP	4.4 mm	Single Supply	85 °C	-40 °C	1	16-TSSOP	4.5 V	5.5 V
Texas Instruments SN74CBT3253DBQRG4	Surface Mount	2	4:1	Multiplexer/Demultiplexer		16-SSOP		Single Supply	85 °C	-40 °C	1	16-SSOP	4.5 V	5.5 V	0.154 in	3.9 mm
Texas Instruments SN74CBT3253PWR	Surface Mount	2	4:1	Multiplexer/Demultiplexer	0.173 in	16-TSSOP	4.4 mm	Single Supply	85 °C	-40 °C	1	16-TSSOP	4.5 V	5.5 V
Texas Instruments SN74CBT3253DBQR	Surface Mount	2	4:1	Multiplexer/Demultiplexer		16-SSOP		Single Supply	85 °C	-40 °C	1	16-SSOP	4.5 V	5.5 V	0.154 in	3.9 mm
Texas Instruments SN74CBT3253DR	Surface Mount	2	4:1	Multiplexer/Demultiplexer	0.154 in	16-SOIC	3.9 mm	Single Supply	85 °C	-40 °C	1	16-SOIC	4.5 V	5.5 V
Texas Instruments SN74CBT3253PWRG4	Surface Mount	2	4:1	Multiplexer/Demultiplexer	0.173 in	16-TSSOP	4.4 mm	Single Supply	85 °C	-40 °C	1	16-TSSOP	4.5 V	5.5 V
Texas Instruments SN74CBT3253CRGYR	Surface Mount	2	4:1	Multiplexer/Demultiplexer		16-VFQFN Exposed Pad		Single Supply	85 °C	-40 °C	1	16-VQFN (4x3.5)	4.5 V	5.5 V
Texas Instruments SN74CBT3253CDRE4	Surface Mount	2	4:1	Multiplexer/Demultiplexer	0.154 in	16-SOIC	3.9 mm	Single Supply	85 °C	-40 °C	1	16-SOIC	4.5 V	5.5 V
Texas Instruments SN74CBT3253CDRG4	Surface Mount	2	4:1	Multiplexer/Demultiplexer	0.154 in	16-SOIC	3.9 mm	Single Supply	85 °C	-40 °C	1	16-SOIC	4.5 V	5.5 V
Texas Instruments SN74CBT3253CPW	Surface Mount	2	4:1	Multiplexer/Demultiplexer	0.173 in	16-TSSOP	4.4 mm	Single Supply	85 °C	-40 °C	1	16-TSSOP	4.5 V	5.5 V

Catalog

5-V, 4:1, 2-channel FET bus switch with –2-V undershoot protection

Key Features

• SN74CBT3253C Functionally Identical to Industry-Standard ’3253 FunctionUndershoot Protection for Off-Isolation on A and B Ports up to -2 VBidirectional Data Flow, With Near-Zero Propagation DelayLow ON-State Resistance (ron) Characteristics (ron= 3Typical)Low Input/Output Capacitance Minimizes Loading and Signal Distortion (Cio(OFF)= 5.5 pF Typical)Data and Control Inputs Provide Undershoot Clamp DiodesLow Power Consumption (ICC= 3 µA Max)VCCOperating Range From 4 V to 5.5 VData 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 OutputsIoffSupports Partial-Power-Down Mode OperationLatch-Up Performance Exceeds 100 mA Per JESD 78, Class IIESD Performance Tested Per JESD 222000-V Human-Body Model (A114-B, Class II)1000-V Charged-Device Model (C101)Supports I2C Bus ExpansionSupports Both Digital and Analog Applications: USB Interface, Bus Isolation, Low-Distortion Signal GatingSN74CBT3253C Functionally Identical to Industry-Standard ’3253 FunctionUndershoot Protection for Off-Isolation on A and B Ports up to -2 VBidirectional Data Flow, With Near-Zero Propagation DelayLow ON-State Resistance (ron) Characteristics (ron= 3Typical)Low Input/Output Capacitance Minimizes Loading and Signal Distortion (Cio(OFF)= 5.5 pF Typical)Data and Control Inputs Provide Undershoot Clamp DiodesLow Power Consumption (ICC= 3 µA Max)VCCOperating Range From 4 V to 5.5 VData 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 OutputsIoffSupports Partial-Power-Down Mode OperationLatch-Up Performance Exceeds 100 mA Per JESD 78, Class IIESD Performance Tested Per JESD 222000-V Human-Body Model (A114-B, Class II)1000-V Charged-Device Model (C101)Supports I2C Bus ExpansionSupports Both Digital and Analog Applications: USB Interface, Bus Isolation, Low-Distortion Signal Gating

Description

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. WhenOEis low, the associated multiplexer/demultiplexer is enabled, and the A port is connected to the B port, allowing bidirectional data flow between ports. WhenOEis high, the associated multiplexer/demultiplexer is disabled, and a high-impedance state exists between the A and B ports. This device is fully specified for partial-power-down applications using Ioff. The Iofffeature 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,OEshould be tied to VCCthrough a pullup resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver. 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. WhenOEis low, the associated multiplexer/demultiplexer is enabled, and the A port is connected to the B port, allowing bidirectional data flow between ports. WhenOEis high, the associated multiplexer/demultiplexer is disabled, and a high-impedance state exists between the A and B ports. This device is fully specified for partial-power-down applications using Ioff. The Iofffeature 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,OEshould be tied to VCCthrough a pullup resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.