SN74CBT3257C Status: ACTIVE

4-Bit 1-Of-2 FET Multiplexer/Demultiplexer with -2 V Undershoot Protection

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Datasheet

SN74CBT3257C (PDF 903 KB)
06 Oct 2003

	SN74CBT3257C
Voltage Nodes(V)	4, 5
Vcc range(V)	4 to 5.5
No. of Bits	4
ron(max)(ohms)	12
tpd max(ns)	0.24
Rating	Catalog
Technology Family	CBT-C
	Samples
	Inventory

Customers Who Evaluated This Product Also Evaluated

SN74CBT3257: 4-Bit 1-Of-2 FET Multiplexer/Demultiplexer
SN74CBTLV3257: Low-Voltage 4-Bit 1-Of-2 FET Multiplexer/Demultiplexer
SN74CBTLV16292: Low-Voltage 12-Bit 1-Of-2 FET Multiplexer/Demultiplexer With Internal Pulldown Resistors
SN74AVC4T245: 4-Bit Dual-Supply Bus Transceiver with Configurable Voltage Translation and 3-State Outputs
TS3A44159: 0.45-Ohm Quad SPDT Analog Switch Quad-Channel 2:1 Multiplexer/Demultiplexer with Two Controls
TS3DV421: 4-Channel Differential 8:24 Multiplexer Switch

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Product Information

Features

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 (r_on) Characteristics (r_on = 3 Typical)
Low Input/Output Capacitance Minimizes Loading and Signal Distortion (C_io(OFF) = 5.5 pF Typical)
Data and Control Inputs Provide Undershoot Clamp Diodes
Low Power Consumption (I_CC = 3 µA Max)
V_CC 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
I_off 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

The SN74CBT3257C is a high-speed TTL-compatible FET multiplexer/demultiplexer with low ON-state resistance (r_on), allowing for minimal propagation delay. Active Undershoot-Protection Circuitry on the A and B ports of the SN74CBT3257C 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 SN74CBT3257C is a 4-bit 1-of-2 multiplexer/demultiplexer with a single output-enable (OE\) input. The select (S) input controls the data path of the multiplexer/demultiplexer. When OE\ is low, the 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 multiplexer/demultiplexer is disabled and a high-impedance state exists between the A and B ports.

View All Description in Datasheet

Pricing / Packaging / CAD Design Tools / Samples

			Price	Packaging			CAD Design Tools	Samples
Device	Status	Temp (^oC)	Price \| Quantity	Package \| Pins	Top Side Marking	Package QTY \| Package Carrier	Footprints	Samples
SN74CBT3257CD	ACTIVE	-40 to 85	0.33 \| 1ku	SOIC (D) \| 16	View	40 \| TUBE	Purchase Samples
SN74CBT3257CDBQR	ACTIVE	-40 to 85	0.31 \| 1ku	SSOP/QSOP (DBQ) \| 16	View	2500 \| LARGE T&R	Contact TI Distributor or Sales Office
SN74CBT3257CDBQRE4	ACTIVE	-40 to 85	0.31 \| 1ku	SSOP/QSOP (DBQ) \| 16	View	2500 \| LARGE T&R	Contact TI Distributor or Sales Office
SN74CBT3257CDBQRG4	ACTIVE	-40 to 85	0.31 \| 1ku	SSOP/QSOP (DBQ) \| 16	View	2500 \| LARGE T&R	Contact TI Distributor or Sales Office
SN74CBT3257CDBR	ACTIVE	-40 to 85	0.31 \| 1ku	SSOP (DB) \| 16	View	2000 \| LARGE T&R	Contact TI Distributor or Sales Office
SN74CBT3257CDBRE4	ACTIVE	-40 to 85	0.31 \| 1ku	SSOP (DB) \| 16	View	2000 \| LARGE T&R	Contact TI Distributor or Sales Office
SN74CBT3257CDBRG4	ACTIVE	-40 to 85	0.31 \| 1ku	SSOP (DB) \| 16	View	2000 \| LARGE T&R	Contact TI Distributor or Sales Office
SN74CBT3257CDE4	ACTIVE	-40 to 85	0.33 \| 1ku	SOIC (D) \| 16	View	40 \| TUBE	Purchase Samples
SN74CBT3257CDG4	ACTIVE	-40 to 85	0.33 \| 1ku	SOIC (D) \| 16	View	40 \| TUBE	Purchase Samples
SN74CBT3257CDR	ACTIVE	-40 to 85	0.31 \| 1ku	SOIC (D) \| 16	View	2500 \| LARGE T&R	Contact TI Distributor or Sales Office
SN74CBT3257CDRE4	ACTIVE	-40 to 85	0.31 \| 1ku	SOIC (D) \| 16	View	2500 \| LARGE T&R	Contact TI Distributor or Sales Office
SN74CBT3257CDRG4	ACTIVE	-40 to 85	0.31 \| 1ku	SOIC (D) \| 16	View	2500 \| LARGE T&R	Contact TI Distributor or Sales Office
SN74CBT3257CPW	ACTIVE	-40 to 85	0.31 \| 1ku	TSSOP (PW) \| 16	View	90 \| TUBE	Purchase Samples
SN74CBT3257CPWE4	ACTIVE	-40 to 85	0.31 \| 1ku	TSSOP (PW) \| 16	View	90 \| TUBE	Purchase Samples
SN74CBT3257CPWG4	ACTIVE	-40 to 85	0.31 \| 1ku	TSSOP (PW) \| 16	View	90 \| TUBE	Purchase Samples
SN74CBT3257CPWR	ACTIVE	-40 to 85	0.31 \| 1ku	TSSOP (PW) \| 16	View	2000 \| LARGE T&R	Contact TI Distributor or Sales Office
SN74CBT3257CPWRE4	ACTIVE	-40 to 85	0.31 \| 1ku	TSSOP (PW) \| 16	View	2000 \| LARGE T&R	Contact TI Distributor or Sales Office
SN74CBT3257CPWRG4	ACTIVE	-40 to 85	0.31 \| 1ku	TSSOP (PW) \| 16	View	2000 \| LARGE T&R	Contact TI Distributor or Sales Office
SN74CBT3257CRGYR	ACTIVE	-40 to 85	0.40 \| 1ku	QFN (RGY) \| 16		1000 \| LARGE T&R		Contact TI Distributor or Sales Office
SN74CBT3257CRGYRG4	ACTIVE	-40 to 85	0.40 \| 1ku	QFN (RGY) \| 16		1000 \| LARGE T&R		Contact TI Distributor or Sales Office

* Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For higher volume price quotes,prices in local currency or delivery quotes, please contact your local Texas Instruments Sales Office or Authorized Distributor.

Inventory

Reported Distributor Inventory as of 11:03 AM GMT, 22 Nov 2009
Region	Company	In Stock	Purchase
TI Lead Time*: 15 WeeksSN74CBT3257CD
Americas	Rochester Electronics	>1k
Asia	WPI	42
Europe	Avnet-SILICA	>1k
Worldwide	DigiKey	Available
Worldwide	Mouser Electronics	>1k
TI Lead Time*: 15 WeeksSN74CBT3257CDBQR
Asia	WPI	699
Asia	Wintech	>1k
Worldwide	Mouser Electronics	>1k
TI Lead Time*: 15 WeeksSN74CBT3257CDBQRE4
None Reported View Distributors
TI Lead Time*: 15 WeeksSN74CBT3257CDBQRG4
None Reported View Distributors
TI Lead Time*: 15 WeeksSN74CBT3257CDBR
Americas	Rochester Electronics	>1k
Asia	WPI	>1k
Worldwide	DigiKey	647
TI Lead Time*: 15 WeeksSN74CBT3257CDBRE4
Worldwide	DigiKey	Available
TI Lead Time*: 15 WeeksSN74CBT3257CDBRG4
Worldwide	DigiKey	Available
TI Lead Time*: 15 WeeksSN74CBT3257CDE4
Worldwide	DigiKey	Available
TI Lead Time*: 15 WeeksSN74CBT3257CDG4
Worldwide	DigiKey	Available
Worldwide	Mouser Electronics	>1k
TI Lead Time*: 15 WeeksSN74CBT3257CDR
Americas	Newark	>1k
Asia	Farnell Asia	>1k
Worldwide	DigiKey	>1k
TI Lead Time*: 15 WeeksSN74CBT3257CDRE4
Worldwide	DigiKey	Available
TI Lead Time*: 15 WeeksSN74CBT3257CDRG4
Worldwide	DigiKey	Available
TI Lead Time*: 18 WeeksSN74CBT3257CPW
Americas	Avnet	>1k
Americas	Rochester Electronics	>1k
Europe	EBV Elektronik	450
Worldwide	Mouser Electronics	169
TI Lead Time*: 18 WeeksSN74CBT3257CPWE4
None Reported View Distributors
TI Lead Time*: 18 WeeksSN74CBT3257CPWG4
None Reported View Distributors
TI Lead Time*: 20 WeeksSN74CBT3257CPWR
Asia	WPI	378
Worldwide	Mouser Electronics	256
TI Lead Time*: 20 WeeksSN74CBT3257CPWRE4
None Reported View Distributors
TI Lead Time*: 20 WeeksSN74CBT3257CPWRG4
None Reported View Distributors
TI Lead Time*: 16 WeeksSN74CBT3257CRGYR
Americas	Rochester Electronics	>1k
Worldwide	DigiKey	331
TI Lead Time*: 16 WeeksSN74CBT3257CRGYRG4
Worldwide	DigiKey	Available
View all Distributors

** Lead time information is not available at this time. However, our information is updated daily so please check back with us soon. Please contact your preferred TI Authorized Distributor for additional information.

Quality & Lead (Pb)-Free Data

	Product Content				DPPM / MTBF / FIT Rate
Device	Eco Plan*	Lead / Ball Finish	MSL Rating / Peak Reflow	Details	Details
SN74CBT3257CD	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
SN74CBT3257CDBQR	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	View	View
SN74CBT3257CDBQRE4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	View	View
SN74CBT3257CDBQRG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	View	View
SN74CBT3257CDBR	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
SN74CBT3257CDBRE4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
SN74CBT3257CDBRG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
SN74CBT3257CDE4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
SN74CBT3257CDG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
SN74CBT3257CDR	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
SN74CBT3257CDRE4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
SN74CBT3257CDRG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
SN74CBT3257CPW	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
SN74CBT3257CPWE4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
SN74CBT3257CPWG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
SN74CBT3257CPWR	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
SN74CBT3257CPWRE4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
SN74CBT3257CPWRG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
SN74CBT3257CRGYR	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	View	View
SN74CBT3257CRGYRG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	View	View

* The planned eco-friendly classification: Pb-Free (RoHS) or Pb-Free (RoHS Exempt) or Green (RoHS & no Sb/Br) - please click on the Product Content Details "View" link in the table above for the latest availability information and additional product content details.

If the information you are requesting is not available online at this time, contact one of our Product Information Centers regarding the availability of this information.

Technical Documents

Most useful technical documents for SN74CBT3257C

Datasheet

SN74CBT3257C (PDF, 903 KB)
06 Oct 2003

Application Notes

Bus FET Switch Solutions for Live Insertion Applications (HTM, 8 KB) 2015 views
07 Feb 2003 Read Abstract
CBT-C, CB3T, and CB3Q Signal-Switch Families (HTM, 8 KB) 2142 views
04 Feb 2003 Read Abstract
Shelf-Life Evaluation of Lead-Free Component Finishes (HTM, 8 KB) 27231 views
24 May 2004 Read Abstract
Understanding and Interpreting Standard-Logic Data Sheets (Rev. B) (HTM, 8 KB) 21673 views
28 May 2003 Read Abstract

View Application Notes for Digital Bus Exchange/Multiplexing Switches

User Guides

LOGIC Pocket Data Book (Rev. B) (PDF, 6001 KB) 47290 views
16 Jan 2007
Signal Switch Data Book (Rev. A) (PDF, 18396 KB) 9634 views
14 Nov 2003

Selection Guides

Logic Guide 2009 (Rev. Z) (PDF, 4263 KB) 90505 views
23 Jul 2009

More Literature

Logic Cross-Reference (Rev. A) (PDF, 2938 KB) 15408 views
07 Oct 2003
Digital Bus Switch Selection Guide (Rev. A) (PDF, 719 KB) 2729 views
10 Nov 2004

Simulation Models

IBIS Model
- SN74CBT3257C IBIS Model (Multiple File Format) 193 views
  26 Jun 2003 Read Abstract

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SN74CBT3257C Status: ACTIVE

4-Bit 1-Of-2 FET Multiplexer/Demultiplexer with -2 V Undershoot Protection

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Datasheet

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