SN74CB3Q3251 Status: ACTIVE

1-of-8 FET Multiplexer/Demultiplexer 2.5-V/3.3-V Low-Voltage High-Bandwidth Bus Switch

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Datasheet

SN74CB3Q3251 (Rev. A) (PDF 783 KB)
23 Mar 2005

	SN74CB3Q3251
Voltage Nodes(V)	2.5, 3.3
No. of Bits	8
ron(max)(ohms)	11
tpd max(ns)	0.12
Vcc min(V)	2.3
Vcc max(V)	3.6
Rating	Catalog
Technology Family	CB3Q
	Samples
	Inventory

Customers Who Evaluated This Product Also Evaluated

SN74CBT3257: 4-Bit 1-Of-2 FET Multiplexer/Demultiplexer
SN74CB3Q3253: Dual 1-of-4 FET Multiplexer/Demultiplexer 2.5-V/3.3-V Low-Voltage High-Bandwidth Bus Switch
SN74CBT3253: Dual 1-Of-4 FET Multiplexer/Demultiplexer

More Related Products

Product Information

Features

High-Bandwidth Data Path (up to 500 MHz ⁽¹⁾)
Equivalent to IDTQS3VH251 Device
5-V Tolerant I/Os With Device Powered Up or Powered Down
Low and Flat ON-State Resistance (r_on) Characteristics Over Operating Range (r_on = 4 Description

The SN74CB3Q3251 is a high-bandwidth FET bus switch utilizing a charge pump to elevate the gate voltage of the pass transistor, providing a low and flat ON-state resistance (r_on). The low and flat ON-state resistance allows for minimal propagation delay and supports rail-to-rail switching on the data input/output (I/O) ports. The device also features low data I/O capacitance to minimize capacitive loading and signal distortion on the data bus. Specifically designed to support high-bandwidth applications, the SN74CB3Q3251 provides an optimized interface solution ideally suited for broadband communications, networking, and data-intensive computing systems.

The SN74CB3Q3251 is a 1-of-8 multiplexer/demultiplexer with a single output-enable (OE\) input. The select (S0, S1, S2) inputs control 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.

This device is fully specified for partial-power-down applications using I_off. The I_off circuitry prevents damaging current 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 V_CC through a pullup resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.

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
74CB3Q3251DBQRE4	ACTIVE	-40 to 85	0.62 \| 1ku	SSOP/QSOP (DBQ) \| 16	View	2500 \| LARGE T&R
74CB3Q3251DGVRE4	ACTIVE	-40 to 85	0.62 \| 1ku	TVSOP (DGV) \| 16		2000 \| LARGE T&R
74CB3Q3251DGVRG4	ACTIVE	-40 to 85	0.62 \| 1ku	TVSOP (DGV) \| 16		2000 \| LARGE T&R
SN74CB3Q3251DBQR	ACTIVE	-40 to 85	0.62 \| 1ku	SSOP/QSOP (DBQ) \| 16	View	2500 \| LARGE T&R
SN74CB3Q3251DBQRG4	ACTIVE	-40 to 85	0.62 \| 1ku	SSOP/QSOP (DBQ) \| 16	View	2500 \| LARGE T&R
SN74CB3Q3251DGVR	ACTIVE	-40 to 85	0.62 \| 1ku	TVSOP (DGV) \| 16		2000 \| LARGE T&R
SN74CB3Q3251PW	ACTIVE	-40 to 85	0.68 \| 1ku	TSSOP (PW) \| 16	View	90 \| TUBE	Purchase Samples
SN74CB3Q3251PWE4	ACTIVE	-40 to 85	0.68 \| 1ku	TSSOP (PW) \| 16	View	90 \| TUBE	Purchase Samples
SN74CB3Q3251PWG4	ACTIVE	-40 to 85	0.68 \| 1ku	TSSOP (PW) \| 16	View	90 \| TUBE	Purchase Samples
SN74CB3Q3251PWR	ACTIVE	-40 to 85	0.62 \| 1ku	TSSOP (PW) \| 16	View	2000 \| LARGE T&R
SN74CB3Q3251PWRE4	ACTIVE	-40 to 85	0.62 \| 1ku	TSSOP (PW) \| 16	View	2000 \| LARGE T&R
SN74CB3Q3251PWRG4	ACTIVE	-40 to 85	0.62 \| 1ku	TSSOP (PW) \| 16	View	2000 \| LARGE T&R
SN74CB3Q3251RGYR	ACTIVE	-40 to 85	0.84 \| 1ku	QFN (RGY) \| 16		1000 \| LARGE T&R

* 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 10:59 AM GMT, 08 Nov 2009
Region	Company	In Stock	Purchase
TI Lead Time*: 15 Weeks74CB3Q3251DBQRE4
Worldwide	DigiKey	Available
TI Lead Time*: 12 Weeks74CB3Q3251DGVRE4
Worldwide	DigiKey	Available
TI Lead Time*: 12 Weeks74CB3Q3251DGVRG4
Worldwide	DigiKey	Available
TI Lead Time*: 15 WeeksSN74CB3Q3251DBQR
Americas	Arrow	>1k
Americas	Rochester Electronics	>1k
Worldwide	DigiKey	>1k
Worldwide	Mouser Electronics	>1k
TI Lead Time*: 15 WeeksSN74CB3Q3251DBQRG4
Worldwide	DigiKey	Available
TI Lead Time*: 12 WeeksSN74CB3Q3251DGVR
Americas	Arrow	>1k
Americas	Rochester Electronics	>1k
Worldwide	DigiKey	>1k
TI Lead Time*: 20 WeeksSN74CB3Q3251PW
Americas	Arrow	725
Americas	Rochester Electronics	850
Worldwide	DigiKey	Available
TI Lead Time*: 20 WeeksSN74CB3Q3251PWE4
Worldwide	DigiKey	Available
TI Lead Time*: 20 WeeksSN74CB3Q3251PWG4
Worldwide	DigiKey	Available
TI Lead Time*: 19 WeeksSN74CB3Q3251PWR
Americas	Arrow	>1k
Worldwide	DigiKey	>1k
TI Lead Time*: 19 WeeksSN74CB3Q3251PWRE4
Worldwide	DigiKey	Available
TI Lead Time*: 19 WeeksSN74CB3Q3251PWRG4
Worldwide	DigiKey	Available
TI Lead Time*: 14 WeeksSN74CB3Q3251RGYR
Asia	WPI	914
Worldwide	DigiKey	740
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
74CB3Q3251DBQRE4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	View	View
74CB3Q3251DGVRE4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
74CB3Q3251DGVRG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
SN74CB3Q3251DBQR	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	View	View
SN74CB3Q3251DBQRG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	View	View
SN74CB3Q3251DGVR	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
SN74CB3Q3251PW	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
SN74CB3Q3251PWE4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
SN74CB3Q3251PWG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
SN74CB3Q3251PWR	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
SN74CB3Q3251PWRE4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
SN74CB3Q3251PWRG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
SN74CB3Q3251RGYR	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 SN74CB3Q3251

Datasheet

SN74CB3Q3251 (Rev. A) (PDF, 783 KB)
23 Mar 2005

Application Notes

Bus FET Switch Solutions for Live Insertion Applications (HTM, 8 KB) 1982 views
07 Feb 2003 Read Abstract
CBT-C, CB3T, and CB3Q Signal-Switch Families (HTM, 8 KB) 2112 views
04 Feb 2003 Read Abstract
Shelf-Life Evaluation of Lead-Free Component Finishes (HTM, 8 KB) 26969 views
24 May 2004 Read Abstract
Understanding and Interpreting Standard-Logic Data Sheets (Rev. B) (HTM, 8 KB) 21380 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) 46833 views
16 Jan 2007
Signal Switch Data Book (Rev. A) (PDF, 18396 KB) 9501 views
14 Nov 2003

Selection Guides

Logic Guide 2009 (Rev. Z) (PDF, 4263 KB) 88618 views
23 Jul 2009

More Literature

Logic Cross-Reference (Rev. A) (PDF, 2938 KB) 15250 views
07 Oct 2003
Digital Bus Switch Selection Guide (Rev. A) (PDF, 719 KB) 2696 views
10 Nov 2004

Simulation Models

IBIS Model
- SN74CB3Q3251 IBIS Model (Multiple File Format) 190 views
  03 Jun 2004 Read Abstract

Customers Who Evaluated This Product Also Evaluated...
Part #	Name	Product Family	Comments
SN74CBT3257	4-Bit 1-Of-2 FET Multiplexer/Demultiplexer	SIGNAL SWITCHES-DIGITAL BUS EXCHANGE/MULTIPLEXING SWITCHES	TI customers also evaluated this product.
SN74CB3Q3253	Dual 1-of-4 FET Multiplexer/Demultiplexer 2.5-V/3.3-V Low-Voltage High-Bandwidth Bus Switch	SIGNAL SWITCHES-DIGITAL BUS EXCHANGE/MULTIPLEXING SWITCHES	TI customers also evaluated this product.
SN74CBT3253	Dual 1-Of-4 FET Multiplexer/Demultiplexer	SIGNAL SWITCHES-DIGITAL BUS EXCHANGE/MULTIPLEXING SWITCHES	TI customers also evaluated this product.
SN74CB3Q3257	4-Bit One-of-2 FET Multiplexer/Demultiplexer 2.5-V/3.3-V Low-Voltage, High-Bandwidth Bus Switch	SIGNAL SWITCHES-DIGITAL BUS EXCHANGE/MULTIPLEXING SWITCHES	TI customers also evaluated this product.
SN74CBTLV3251	Low-Voltage 1-Of-8 FET Multiplexer/Demultiplexer	SIGNAL SWITCHES-DIGITAL BUS EXCHANGE/MULTIPLEXING SWITCHES	TI customers also evaluated this product.
SN74CBTLV3257	Low-Voltage 4-Bit 1-Of-2 FET Multiplexer/Demultiplexer	SIGNAL SWITCHES-DIGITAL BUS EXCHANGE/MULTIPLEXING SWITCHES	TI customers also evaluated this product.
SN74CBT3251	1-Of-8 FET Multiplexer/Demultiplexer	SIGNAL SWITCHES-DIGITAL BUS EXCHANGE/MULTIPLEXING SWITCHES	TI customers also evaluated this product.
SN74CBT16390	16-Bit To 32-Bit FET Multiplexer/Demultiplexer Bus Switch	SIGNAL SWITCHES-DIGITAL BUS EXCHANGE/MULTIPLEXING SWITCHES	TI customers also evaluated this product.
SN74CBTLV3253	Low-Voltage Dual 1-of-4 FET Multiplexer/Demultiplexer	SIGNAL SWITCHES-DIGITAL BUS EXCHANGE/MULTIPLEXING SWITCHES	TI customers also evaluated this product.

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SN74CB3Q3251 Status: ACTIVE

1-of-8 FET Multiplexer/Demultiplexer 2.5-V/3.3-V Low-Voltage High-Bandwidth Bus Switch

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Datasheet

Customers Who Evaluated This Product Also Evaluated

Product Information

Features

Pricing / Packaging / CAD Design Tools / Samples

Inventory

Quality & Lead (Pb)-Free Data

Technical Documents

Datasheet

Application Notes

User Guides

Selection Guides

More Literature

Simulation Models

Support and Community

Customer Tags

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