SN74CBT16244C Series

5V, 1:1 (SPST), 16-channel FET bus switch with –2V undershoot protection and four control inputs

Catalog

5V, 1:1 (SPST), 16-channel FET bus switch with –2V undershoot protection and four control inputs

Part	Package / Case	Package / Case	Mounting Type	Operating Temperature [Max]	Operating Temperature [Min]	Type	Voltage Supply Source	Independent Circuits	Voltage - Supply [Min]	Voltage - Supply [Max]	Circuit	Package / Case [custom]	Supplier Device Package	Package / Case [y]	Package / Case [y]
Texas Instruments SN74CBT16244CDGVR	0.173 in 4.4 mm	48-TFSOP	Surface Mount	85 °C	-40 °C	Bus Switch	Single Supply	4	4.5 V	5.5 V	4 x 1:1
Texas Instruments SN74CBT16244CDGGR	0.24 in	48-TFSOP	Surface Mount	85 °C	-40 °C	Bus Switch	Single Supply	4	4.5 V	5.5 V	4 x 1:1	6.1 mm	48-TSSOP
Texas Instruments SN74CBT16244DL		48-BSSOP	Surface Mount	85 °C	-40 °C	Bus Switch	Single Supply	4	4.5 V	5.5 V	4 x 1:1		48-SSOP	0.295 in	7.5 mm
Texas Instruments SN74CBT16244CDL		48-BSSOP	Surface Mount	85 °C	-40 °C	Bus Switch	Single Supply	4	4.5 V	5.5 V	4 x 1:1		48-SSOP	0.295 in	7.5 mm

Catalog

5V, 1:1 (SPST), 16-channel FET bus switch with –2V undershoot protection and four control inputs

Key Features

• Member of the Texas Instruments Widebus™ FamilyUndershoot 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 Both Digital and Analog Applications: PCI Interface, USB Interface, Memory Interleaving, Bus Isolation, Low-Distortion Signal GatingWidebus is a trademark of Texas Instruments.Member of the Texas Instruments Widebus™ FamilyUndershoot 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 Both Digital and Analog Applications: PCI Interface, USB Interface, Memory Interleaving, Bus Isolation, Low-Distortion Signal GatingWidebus is a trademark of Texas Instruments.

Description

The SN74CBT16244C is a high-speed TTL-compatible FET bus switch with low ON-state resistance (ron), allowing for minimal propagation delay. Active Undershoot-Protection Circuitry on the A and B ports of the SN74CBT16244C 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 SN74CBT16244C is organized as four 4-bit bus switches with separate output-enable (1OE\, 2OE\, 3OE\, 4OE\) inputs. It can be used as four 4-bit bus switches, two 8-bit bus switches, or as one 16-bit bus switch. When OE\ is low, the associated 4-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 associated 4-bit bus switch is OFF, and the 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. To ensure the high-impedance state during power up or power down, OE\ should be tied to VCCthrough a pullup resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver. The SN74CBT16244C is a high-speed TTL-compatible FET bus switch with low ON-state resistance (ron), allowing for minimal propagation delay. Active Undershoot-Protection Circuitry on the A and B ports of the SN74CBT16244C 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 SN74CBT16244C is organized as four 4-bit bus switches with separate output-enable (1OE\, 2OE\, 3OE\, 4OE\) inputs. It can be used as four 4-bit bus switches, two 8-bit bus switches, or as one 16-bit bus switch. When OE\ is low, the associated 4-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 associated 4-bit bus switch is OFF, and the 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. To ensure the high-impedance state during power up or power down, OE\ should be tied to VCCthrough a pullup resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.