Specification	SN74CBT3244DBR

Circuit	4 x 1:1
Independent Circuits	2
Mounting Type	Surface Mount
Operating Temperature [Max]	85 °C
Operating Temperature [Min]	-40 °C
Package / Case	20-SSOP
Supplier Device Package	20-SSOP
Type	Bus Switch
Voltage - Supply [Max]	5.5 V
Voltage - Supply [Min]	4.5 V
Voltage Supply Source	Single Supply

SN74CBT3244C Series

5-V, 1:1 (SPST), 8-channel FET bus switch with –2-V undershoot protection and 2 control inputs

Part	Supplier Device Package	Voltage Supply Source	Operating Temperature [Max]	Operating Temperature [Min]	Voltage - Supply [Max]	Voltage - Supply [Min]	Type	Independent Circuits	Package / Case	Mounting Type	Circuit	Package / Case [y]	Package / Case [x]	Package / Case [y]	Package / Case [custom]	Package / Case [custom]
Texas Instruments SN74CBT3244CDBR	20-SSOP	Single Supply	85 °C	-40 °C	5.5 V	4 V	Bus Switch	2	20-SSOP	Surface Mount	4 x 1:1
Texas Instruments SN74CBT3244PW	20-TSSOP	Single Supply	85 °C	-40 °C	5.5 V	4.5 V	Bus Switch	2	20-TSSOP	Surface Mount	4 x 1:1	4.4 mm	0.173 in
Texas Instruments SN74CBT3244CDW	20-SOIC	Single Supply	85 °C	-40 °C	5.5 V	4 V	Bus Switch	2	20-SOIC	Surface Mount	4 x 1:1	0.295 in		7.5 mm
Texas Instruments SN74CBT3244CPWR	20-TSSOP	Single Supply	85 °C	-40 °C	5.5 V	4 V	Bus Switch	2	20-TSSOP	Surface Mount	4 x 1:1	4.4 mm	0.173 in
Texas Instruments SN74CBT3244DBQR	20-SSOP	Single Supply	85 °C	-40 °C	5.5 V	4.5 V	Bus Switch	2	20-SSOP	Surface Mount	4 x 1:1				0.154 in	3.9 mm
Texas Instruments SN74CBT3244DBR	20-SSOP	Single Supply	85 °C	-40 °C	5.5 V	4.5 V	Bus Switch	2	20-SSOP	Surface Mount	4 x 1:1
Texas Instruments SN74CBT3244PWRE4	20-TSSOP	Single Supply	85 °C	-40 °C	5.5 V	4.5 V	Bus Switch	2	20-TSSOP	Surface Mount	4 x 1:1	4.4 mm	0.173 in
Texas Instruments SN74CBT3244PWR	20-TSSOP	Single Supply	85 °C	-40 °C	5.5 V	4.5 V	Bus Switch	2	20-TSSOP	Surface Mount	4 x 1:1	4.4 mm	0.173 in
Texas Instruments SN74CBT3244CPW	20-TSSOP	Single Supply	85 °C	-40 °C	5.5 V	4 V	Bus Switch	2	20-TSSOP	Surface Mount	4 x 1:1	4.4 mm	0.173 in
Texas Instruments SN74CBT3244PWRG4	20-TSSOP	Single Supply	85 °C	-40 °C	5.5 V	4.5 V	Bus Switch	2	20-TSSOP	Surface Mount	4 x 1:1	4.4 mm	0.173 in

Pricing

Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly

Distributor	Package	Quantity	$

Digikey	Cut Tape (CT)	1	$ 0.75
		10	$ 0.66
		25	$ 0.62
		100	$ 0.51
		250	$ 0.47
		500	$ 0.40
		1000	$ 0.32
	Digi-Reel®	1	$ 0.75
		10	$ 0.66
		25	$ 0.62
		100	$ 0.51
		250	$ 0.47
		500	$ 0.40
		1000	$ 0.32
	Tape & Reel (TR)	2000	$ 0.29
		4000	$ 0.27
		6000	$ 0.26
		10000	$ 0.25
		14000	$ 0.24
		20000	$ 0.24
Texas Instruments	LARGE T&R	1	$ 0.54
		100	$ 0.42
		250	$ 0.31
		1000	$ 0.22

Description

General part information

SN74CBT3244C Series

The SN74CBT3244C 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 SN74CBT3244C 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 SN74CBT3244C is organized as two 4-bit bus switches with separate output-enable (1OE\, 2OE\) inputs. It can be used as two 4-bit bus switches or as one 8-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.

Documents

Technical documentation and resources

SN74CBT3244 Octal FET Bus Switch datasheet (Rev. O)

Data sheet