SN74CB3Q3257 Status: ACTIVE

4-Bit One-of-2 FET Multiplexer/Demultiplexer 2.5-V/3.3-V Low-Voltage, High-Bandwidth Bus Switch

Alert me about changes<br/>to this product

Alert me about changes
to this product

Datasheet

SN74CB3Q3257 (Rev. A) (PDF 804 KB)
20 Nov 2003

	SN74CB3Q3257
Voltage Nodes(V)	2.5, 3.3
No. of Bits	4
ICC(uA)	1500
ron(max)(ohms)	9
tpd max(ns)	0.2
Vcc min(V)	3.6
Vcc max(V)	2.3
Rating	Catalog
Technology Family	CB3Q
	Samples
	Inventory

Customers Who Evaluated This Product Also Evaluated

SN74CBTLV3257: Low-Voltage 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
SN74CBT3257: 4-Bit 1-Of-2 FET Multiplexer/Demultiplexer
MAX3221: 3-V to 5.5-V Single-Channel RS-232 Line Driver/Receiver
TPD2E001: Low-Capacitance 2-Channel +/-15 kV ESD-Protection Array for High-Speed Data Interfaces
MAX3243: 3-V to 5.5-V Multichannel RS-232 Line Driver/Receiver With +/-15kV ESD (HBM) Protection

Product Information

Features

High-Bandwidth Data Path (Up to 500 MHz)
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 Typical)
Rail-to-Rail Switching on Data I/O Ports
- 0- to 5-V Switching With 3.3-V V_CC
- 0- to 3.3-V Switching With 2.5-V V_CC
Bidirectional Data Flow, With Near-Zero Propagation Delay
Low Input/Output Capacitance Minimizes Loading and Signal Distortion (C_io(OFF) = 3.5 pF Typical)
Fast Switching Frequency (f_OE\ = 20 MHz Max)
Data and Control Inputs Provide Undershoot Clamp Diodes
Low Power Consumption (I_CC = 0.7 mA Typical)
V_CC Operating Range From 2.3 V to 3.6 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 Both Digital and Analog Applications: USB Interface, Differential Signal Interface, Bus Isolation, Low-Distortion Signal Gating

For additional information regarding the performance characteristics of the CB3Q family, refer to the TI application report, CBT-C, CB3T, and CB3Q Signal-Switch Families, literature number SCDA008.

Description

The SN74CB3Q3257 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 SN74CB3Q3257 provides an optimized interface solution ideally suited for broadband communications, networking, and data-intensive computing systems.

The SN74CB3Q3257 is a 4-bit 1-of-2 high-speed FET 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.

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
74CB3Q3257DBQRE4	ACTIVE	-40 to 85	0.62 \| 1ku	SSOP/QSOP (DBQ) \| 16	View	2500 \| LARGE T&R
74CB3Q3257DBQRG4	ACTIVE	-40 to 85	0.62 \| 1ku	SSOP/QSOP (DBQ) \| 16	View	2500 \| LARGE T&R
74CB3Q3257DGVRE4	ACTIVE	-40 to 85	0.68 \| 1ku	TVSOP (DGV) \| 16		2000 \| LARGE T&R
74CB3Q3257DGVRG4	ACTIVE	-40 to 85	0.68 \| 1ku	TVSOP (DGV) \| 16		2000 \| LARGE T&R
74CB3Q3257RGYRG4	ACTIVE	-40 to 85	0.84 \| 1ku	QFN (RGY) \| 16		1000 \| LARGE T&R
SN74CB3Q3257DBQR	ACTIVE	-40 to 85	0.62 \| 1ku	SSOP/QSOP (DBQ) \| 16	View	2500 \| LARGE T&R
SN74CB3Q3257DGVR	ACTIVE	-40 to 85	0.68 \| 1ku	TVSOP (DGV) \| 16		2000 \| LARGE T&R
SN74CB3Q3257PW	ACTIVE	-40 to 85	0.62 \| 1ku	TSSOP (PW) \| 16	View	90 \| TUBE	Purchase Samples
SN74CB3Q3257PWE4	ACTIVE	-40 to 85	0.62 \| 1ku	TSSOP (PW) \| 16	View	90 \| TUBE	Purchase Samples
SN74CB3Q3257PWG4	ACTIVE	-40 to 85	0.62 \| 1ku	TSSOP (PW) \| 16	View	90 \| TUBE	Purchase Samples
SN74CB3Q3257PWR	ACTIVE	-40 to 85	0.62 \| 1ku	TSSOP (PW) \| 16	View	2000 \| LARGE T&R
SN74CB3Q3257PWRE4	ACTIVE	-40 to 85	0.62 \| 1ku	TSSOP (PW) \| 16	View	2000 \| LARGE T&R
SN74CB3Q3257PWRG4	ACTIVE	-40 to 85	0.62 \| 1ku	TSSOP (PW) \| 16	View	2000 \| LARGE T&R
SN74CB3Q3257RGYR	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 Weeks74CB3Q3257DBQRE4
None Reported View Distributors
TI Lead Time*: 15 Weeks74CB3Q3257DBQRG4
None Reported View Distributors
TI Lead Time*: 15 Weeks74CB3Q3257DGVRE4
Worldwide	DigiKey	Available
TI Lead Time*: 15 Weeks74CB3Q3257DGVRG4
Worldwide	DigiKey	Available
TI Lead Time*: 17 Weeks74CB3Q3257RGYRG4
None Reported View Distributors
TI Lead Time*: 15 WeeksSN74CB3Q3257DBQR
Asia	WPI	>1k
TI Lead Time*: 15 WeeksSN74CB3Q3257DGVR
Americas	Arrow	>1k
Americas	Rochester Electronics	>1k
Worldwide	DigiKey	>1k
Worldwide	Mouser Electronics	>1k
TI Lead Time*: 19 WeeksSN74CB3Q3257PW
Americas	Arrow	74
Americas	Avnet	>1k
Asia	Farnell Asia	220
Asia	WPI	50
Europe	Farnell	220
Worldwide	Mouser Electronics	257
TI Lead Time*: 19 WeeksSN74CB3Q3257PWE4
Worldwide	Mouser Electronics	743
TI Lead Time*: 19 WeeksSN74CB3Q3257PWG4
None Reported View Distributors
TI Lead Time*: 19 WeeksSN74CB3Q3257PWR
Americas	Rochester Electronics	>1k
Europe	Avnet-SILICA	>1k
TI Lead Time*: 19 WeeksSN74CB3Q3257PWRE4
None Reported View Distributors
TI Lead Time*: 19 WeeksSN74CB3Q3257PWRG4
None Reported View Distributors
TI Lead Time*: 17 WeeksSN74CB3Q3257RGYR
Americas	Rochester Electronics	>1k
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
74CB3Q3257DBQRE4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	View	View
74CB3Q3257DBQRG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	View	View
74CB3Q3257DGVRE4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
74CB3Q3257DGVRG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
74CB3Q3257RGYRG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	View	View
SN74CB3Q3257DBQR	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	View	View
SN74CB3Q3257DGVR	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
SN74CB3Q3257PW	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
SN74CB3Q3257PWE4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
SN74CB3Q3257PWG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
SN74CB3Q3257PWR	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
SN74CB3Q3257PWRE4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
SN74CB3Q3257PWRG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
SN74CB3Q3257RGYR	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 SN74CB3Q3257

Datasheet

SN74CB3Q3257 (Rev. A) (PDF, 804 KB)
20 Nov 2003

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
- SN74CB3Q3257 IBIS Model (Multiple File Format) 238 views
  14 Jul 2003 Read Abstract
HSpice Model
- HSPICE Model of SN74CB3Q3257 (ZIP, 28 KB) 200 views
  24 Jun 2004

Customers Who Evaluated This Product Also Evaluated...
Part #	Name	Product Family	Comments
SN74CBTLV3257	Low-Voltage 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.
SN74CBT3257	4-Bit 1-Of-2 FET Multiplexer/Demultiplexer	SIGNAL SWITCHES-DIGITAL BUS EXCHANGE/MULTIPLEXING SWITCHES	TI customers also evaluated this product.
MAX3221	3-V to 5.5-V Single-Channel RS-232 Line Driver/Receiver	INTERFACE-RS-232	TI customers also evaluated this product.
TPD2E001	Low-Capacitance 2-Channel +/-15 kV ESD-Protection Array for High-Speed Data Interfaces	ESD/EMI Protection-ESD Solutions	TI customers also evaluated this product.
MAX3243	3-V to 5.5-V Multichannel RS-232 Line Driver/Receiver With +/-15kV ESD (HBM) Protection	INTERFACE-RS-232	TI customers also evaluated this product.
SN74AVC4T245	4-Bit Dual-Supply Bus Transceiver with Configurable Voltage Translation and 3-State Outputs	VOLTAGE LEVEL TRANSLATION-DUAL SUPPLY TRANSLATORS	TI customers also evaluated this product.
SN74LVC1G08	Single 2-Input Positive-AND Gate	LITTLE LOGIC-LL GATE	TI customers also evaluated this product.
TPS65053	5-Channel Power Mgmt IC with two step down converters and 3 low-input voltage LDOs	POWER MANAGEMENT MULTI-CHANNEL IC (PMIC) SOLUTIONS-PMIC SOLUTIONS WITH AND WITHOUT BATTERY CHARGER	TI customers also evaluated this product.
TPS51100	3A Source/Sink DDR terminator Regulator	LINEAR REGULATORS-SINGLE CHANNEL LDO	TI customers also evaluated this product.
TL431B	Adjustable Precision Shunt Regulator	VOLTAGE REFERENCE-SHUNT VOLTAGE REFERENCE	TI customers also evaluated this product.
MAX3232	3-V to 5.5-V Multichannel RS-232 Line Driver/Receiver	INTERFACE-RS-232	TI customers also evaluated this product.
UCC28C43	BiCMOS Low-Power Current Mode PWM Controller	AC/DC AND DC/DC POWER SUPPLIES-PWM POWER SUPPLY CONTROLLERS	TI customers also evaluated this product.

Support and Community

Customer Tags

No Tags are Available for this Part Number

SN74CB3Q3257 Status: ACTIVE

4-Bit One-of-2 FET Multiplexer/Demultiplexer 2.5-V/3.3-V Low-Voltage, High-Bandwidth Bus Switch

Most Popular Links

Datasheet

Customers Who Evaluated This Product Also Evaluated