SN74CBT3345C Status: ACTIVE

8-Bit FET Bus Switch with -2 V Undershoot Protection

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Datasheet

SN74CBT3345C (Rev. A) (PDF 915 KB)
15 Oct 2003

	SN74CBT3345C
Voltage Nodes(V)	5
Vcc range(V)	4.0 to 5.5
No. of Bits	8
Input Level	TTL
ron(max)(ohms)	12
Static Current	0.003
tpd max(ns)	0.15
Rating	Catalog
Technology Family	CBT-C
	Samples
	Inventory

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 Both Digital and Analog Applications: USB Interface, Memory Interleaving, Bus Isolation, Low-Distortion Signal Gating

Description

The SN74CBT3345C is a high-speed TTL-compatible FET bus switch with low ON-state resistance (r_on), allowing for minimal propagation delay. Active Undershoot-Protection Circuitry on the A and B ports of the SN74CBT3345C 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 SN74CBT3345C is organized as an 8-bit bus switch with two output-enable (OE, OE\) inputs. When OE is high or OE\ is low, the bus switch is ON, and the A port is connected to the B port, allowing bidirectional data flow between ports. When OE is low and OE\ is high, the 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 I_off. The I_off feature 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 V_CC through a pullup resistor and OE should be tied to GND through a pulldown resistor; the minimum value of the resistor is determined by the current-sinking/current-sourcing 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
SN74CBT3345CDBQR	ACTIVE	-40 to 85	0.31 \| 1ku	SSOP/QSOP (DBQ) \| 20	View	2500 \| LARGE T&R	Contact TI Distributor or Sales Office
SN74CBT3345CDBQRE4	ACTIVE	-40 to 85	0.31 \| 1ku	SSOP/QSOP (DBQ) \| 20	View	2500 \| LARGE T&R	Contact TI Distributor or Sales Office
SN74CBT3345CDBQRG4	ACTIVE	-40 to 85	0.31 \| 1ku	SSOP/QSOP (DBQ) \| 20	View	2500 \| LARGE T&R	Contact TI Distributor or Sales Office
SN74CBT3345CDBR	ACTIVE	-40 to 85	0.31 \| 1ku	SSOP (DB) \| 20	View	2000 \| LARGE T&R	Contact TI Distributor or Sales Office
SN74CBT3345CDBRE4	ACTIVE	-40 to 85	0.31 \| 1ku	SSOP (DB) \| 20	View	2000 \| LARGE T&R	Contact TI Distributor or Sales Office
SN74CBT3345CDBRG4	ACTIVE	-40 to 85	0.31 \| 1ku	SSOP (DB) \| 20	View	2000 \| LARGE T&R	Contact TI Distributor or Sales Office
SN74CBT3345CDGVR	ACTIVE	-40 to 85	0.34 \| 1ku	TVSOP (DGV) \| 20		2000 \| LARGE T&R	Contact TI Distributor or Sales Office
SN74CBT3345CDGVRE4	ACTIVE	-40 to 85	0.34 \| 1ku	TVSOP (DGV) \| 20		2000 \| LARGE T&R	Contact TI Distributor or Sales Office
SN74CBT3345CDGVRG4	ACTIVE	-40 to 85	0.34 \| 1ku	TVSOP (DGV) \| 20		2000 \| LARGE T&R	Contact TI Distributor or Sales Office
SN74CBT3345CDW	ACTIVE	-40 to 85	0.31 \| 1ku	SOIC (DW) \| 20	View	25 \| TUBE	Purchase Samples
SN74CBT3345CDWE4	ACTIVE	-40 to 85	0.31 \| 1ku	SOIC (DW) \| 20	View	25 \| TUBE	Purchase Samples
SN74CBT3345CDWG4	ACTIVE	-40 to 85	0.31 \| 1ku	SOIC (DW) \| 20	View	25 \| TUBE	Purchase Samples
SN74CBT3345CDWR	ACTIVE	-40 to 85	0.31 \| 1ku	SOIC (DW) \| 20	View	2000 \| LARGE T&R	Contact TI Distributor or Sales Office
SN74CBT3345CDWRE4	ACTIVE	-40 to 85	0.31 \| 1ku	SOIC (DW) \| 20	View	2000 \| LARGE T&R	Contact TI Distributor or Sales Office
SN74CBT3345CDWRG4	ACTIVE	-40 to 85	0.31 \| 1ku	SOIC (DW) \| 20	View	2000 \| LARGE T&R	Contact TI Distributor or Sales Office
SN74CBT3345CPW	ACTIVE	-40 to 85	0.31 \| 1ku	TSSOP (PW) \| 20	View	70 \| TUBE	Purchase Samples
SN74CBT3345CPWE4	ACTIVE	-40 to 85	0.31 \| 1ku	TSSOP (PW) \| 20	View	70 \| TUBE	Purchase Samples
SN74CBT3345CPWG4	ACTIVE	-40 to 85	0.31 \| 1ku	TSSOP (PW) \| 20	View	70 \| TUBE	Purchase Samples
SN74CBT3345CPWR	ACTIVE	-40 to 85	0.31 \| 1ku	TSSOP (PW) \| 20	View	2000 \| LARGE T&R	Contact TI Distributor or Sales Office
SN74CBT3345CPWRE4	ACTIVE	-40 to 85	0.31 \| 1ku	TSSOP (PW) \| 20	View	2000 \| LARGE T&R	Contact TI Distributor or Sales Office
SN74CBT3345CPWRG4	ACTIVE	-40 to 85	0.31 \| 1ku	TSSOP (PW) \| 20	View	2000 \| LARGE T&R	Contact TI Distributor or Sales Office
SN74CBT3345CRGYR	ACTIVE	-40 to 85	0.44 \| 1ku	QFN (RGY) \| 20		1000 \| LARGE T&R		Contact TI Distributor or Sales Office
SN74CBT3345CRGYRG4	ACTIVE	-40 to 85	0.44 \| 1ku	QFN (RGY) \| 20		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 10:58 AM GMT, 08 Nov 2009
Region	Company	In Stock	Purchase
TI Lead Time*: 15 WeeksSN74CBT3345CDBQR
Americas	Rochester Electronics	>1k
Worldwide	DigiKey	>1k
Worldwide	Mouser Electronics	>1k
TI Lead Time*: 15 WeeksSN74CBT3345CDBQRE4
Worldwide	DigiKey	Available
TI Lead Time*: 15 WeeksSN74CBT3345CDBQRG4
Worldwide	DigiKey	Available
TI Lead Time*: 15 WeeksSN74CBT3345CDBR
Americas	Rochester Electronics	>1k
Worldwide	DigiKey	>1k
TI Lead Time*: 15 WeeksSN74CBT3345CDBRE4
Worldwide	DigiKey	Available
TI Lead Time*: 15 WeeksSN74CBT3345CDBRG4
Worldwide	DigiKey	Available
TI Lead Time*: 12 WeeksSN74CBT3345CDGVR
Americas	Rochester Electronics	>1k
Worldwide	DigiKey	>1k
TI Lead Time*: 12 WeeksSN74CBT3345CDGVRE4
Worldwide	DigiKey	Available
TI Lead Time*: 12 WeeksSN74CBT3345CDGVRG4
Worldwide	DigiKey	Available
TI Lead Time*: 15 WeeksSN74CBT3345CDW
Americas	Rochester Electronics	>1k
Worldwide	DigiKey	Available
TI Lead Time*: 15 WeeksSN74CBT3345CDWE4
Worldwide	DigiKey	Available
TI Lead Time*: 15 WeeksSN74CBT3345CDWG4
Worldwide	DigiKey	Available
TI Lead Time*: 15 WeeksSN74CBT3345CDWR
Americas	Newark	>1k
Asia	Farnell Asia	>1k
Worldwide	DigiKey	>1k
Worldwide	Mouser Electronics	>1k
TI Lead Time*: 15 WeeksSN74CBT3345CDWRE4
Worldwide	DigiKey	Available
TI Lead Time*: 15 WeeksSN74CBT3345CDWRG4
Worldwide	DigiKey	Available
TI Lead Time*: 18 WeeksSN74CBT3345CPW
Americas	Rochester Electronics	>1k
Worldwide	DigiKey	Available
TI Lead Time*: 18 WeeksSN74CBT3345CPWE4
Worldwide	DigiKey	Available
TI Lead Time*: 18 WeeksSN74CBT3345CPWG4
Worldwide	DigiKey	Available
TI Lead Time*: 14 WeeksSN74CBT3345CPWR
Americas	Rochester Electronics	>1k
Worldwide	DigiKey	>1k
Worldwide	Mouser Electronics	>1k
TI Lead Time*: 14 WeeksSN74CBT3345CPWRE4
Worldwide	DigiKey	Available
TI Lead Time*: 14 WeeksSN74CBT3345CPWRG4
Worldwide	DigiKey	Available
TI Lead Time*: 14 WeeksSN74CBT3345CRGYR
Americas	Rochester Electronics	>1k
Worldwide	DigiKey	990
TI Lead Time*: 14 WeeksSN74CBT3345CRGYRG4
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
SN74CBT3345CDBQR	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	View	View
SN74CBT3345CDBQRE4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	View	View
SN74CBT3345CDBQRG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	View	View
SN74CBT3345CDBR	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
SN74CBT3345CDBRE4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
SN74CBT3345CDBRG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
SN74CBT3345CDGVR	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
SN74CBT3345CDGVRE4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
SN74CBT3345CDGVRG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
SN74CBT3345CDW	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
SN74CBT3345CDWE4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
SN74CBT3345CDWG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
SN74CBT3345CDWR	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
SN74CBT3345CDWRE4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
SN74CBT3345CDWRG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
SN74CBT3345CPW	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
SN74CBT3345CPWE4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
SN74CBT3345CPWG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
SN74CBT3345CPWR	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
SN74CBT3345CPWRE4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
SN74CBT3345CPWRG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
SN74CBT3345CRGYR	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	View	View
SN74CBT3345CRGYRG4	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 SN74CBT3345C

Datasheet

SN74CBT3345C (Rev. A) (PDF, 915 KB)
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Selection Guides

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More Literature

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Simulation Models

IBIS Model
- SN74CBT3345C IBIS Model (Multiple File Format) 159 views
  16 Jul 2003 Read Abstract

Support and Community

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SN74CBT3345C Status: ACTIVE

8-Bit FET Bus Switch with -2 V Undershoot Protection

Most Popular Links

Datasheet

Product Information

Features

Description

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

Other Support