SN74CBT16811C Status: ACTIVE

24-Bit FET Bus Switch with Precharged Outputs and -2 V Undershoot Protection

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Datasheet

SN74CBT16811C (Rev. C) (PDF 371 KB)
15 Oct 2003

	SN74CBT16811C
Voltage Nodes(V)	5
Vcc range(V)	4.0 to 5.5
No. of Bits	24
Input Level	TTL
ron(max)(ohms)	12
Static Current(Max)	0.01
tpd max(ns)	0.25
Rating	Catalog
Technology Family	CBT-C
	Samples
	Inventory

Product Information

Features

Member of the Texas Instruments Widebus™ Family
Undershoot Protection for Off-Isolation on A and B Ports Up To –2 V
B-Port Outputs Are Precharged by Bias Voltage (BIASV) to Minimize Signal Distortion During Live Insertion and Hot-Plugging
Supports PCI Hot Plug
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: PCI Interface, Memory Interleaving, Bus Isolation, Low-Distortion Signal Gating

Widebus is a trademark of Texas Instruments.

Description

The SN74CBT16811C 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 SN74CBT16811C 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 device also precharges the B port to a user-selectable bias voltage (BIASV) to minimize live-insertion noise.

The SN74CBT16811C is organized as two 12-bit bus switches with separate output-enable (1OE\, 2OE\) inputs. It can be used as two 12-bit bus switches or as one 24-bit bus switch. When OE\ is low, the associated 12-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 12-bit bus switch is OFF, and a high-impedance state exists between the A and B ports. The B port is precharged to BIASV through the equivalent of a 10-k resistor when OE\ is high, or if the device is powered down (V_CC = 0 V).

During insertion (or removal) of a card into (or from) an active bus, the card’s output voltage may be close to GND. When the connector pins make contact, the card’s parasitic capacitance tries to force the bus signal to GND, creating a possible glitch on the active bus. This glitching effect can be reduced by using a bus switch with precharged bias voltage (BIASV) of the bus switch equal to the input threshold voltage level of the receivers on the active bus. This method will ensure that any glitch produced by insertion (or removal) of the card will not cross the input threshold region of the receivers on the active bus, minimizing the effects of live-insertion noise.

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; 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
74CBT16811CDGGRE4	ACTIVE	-40 to 85	1.10 \| 1ku	TSSOP (DGG) \| 56	View	2000 \| LARGE T&R	Contact TI Distributor or Sales Office
74CBT16811CDGGRG4	ACTIVE	-40 to 85	1.10 \| 1ku	TSSOP (DGG) \| 56	View	2000 \| LARGE T&R	Contact TI Distributor or Sales Office
74CBT16811CDGVRE4	ACTIVE	-40 to 85	1.10 \| 1ku	TVSOP (DGV) \| 56		2000 \| LARGE T&R	Contact TI Distributor or Sales Office
74CBT16811CDGVRG4	ACTIVE	-40 to 85	1.10 \| 1ku	TVSOP (DGV) \| 56		2000 \| LARGE T&R	Contact TI Distributor or Sales Office
SN74CBT16811CDGGR	ACTIVE	-40 to 85	1.10 \| 1ku	TSSOP (DGG) \| 56	View	2000 \| LARGE T&R	Contact TI Distributor or Sales Office
SN74CBT16811CDGVR	ACTIVE	-40 to 85	1.10 \| 1ku	TVSOP (DGV) \| 56		2000 \| LARGE T&R	Contact TI Distributor or Sales Office
SN74CBT16811CDL	ACTIVE	-40 to 85	1.10 \| 1ku	SSOP (DL) \| 56	View	20 \| TUBE	Purchase Samples
SN74CBT16811CDLG4	ACTIVE	-40 to 85	1.10 \| 1ku	SSOP (DL) \| 56	View	20 \| TUBE	Purchase Samples
SN74CBT16811CDLR	ACTIVE	-40 to 85	1.10 \| 1ku	SSOP (DL) \| 56	View	1000 \| LARGE T&R	Contact TI Distributor or Sales Office
SN74CBT16811CDLRG4	ACTIVE	-40 to 85	1.10 \| 1ku	SSOP (DL) \| 56	View	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*: 18 Weeks74CBT16811CDGGRE4
Worldwide	DigiKey	Available
TI Lead Time*: 18 Weeks74CBT16811CDGGRG4
Worldwide	DigiKey	Available
TI Lead Time*: 12 Weeks74CBT16811CDGVRE4
Worldwide	DigiKey	Available
TI Lead Time*: 12 Weeks74CBT16811CDGVRG4
Worldwide	DigiKey	Available
TI Lead Time*: 18 WeeksSN74CBT16811CDGGR
Americas	Rochester Electronics	>1k
Worldwide	DigiKey	729
TI Lead Time*: 12 WeeksSN74CBT16811CDGVR
Americas	Rochester Electronics	>1k
Worldwide	DigiKey	>1k
TI Lead Time*: 15 WeeksSN74CBT16811CDL
Americas	Rochester Electronics	>1k
Worldwide	DigiKey	Available
TI Lead Time*: 15 WeeksSN74CBT16811CDLG4
Worldwide	DigiKey	Available
TI Lead Time*: 15 WeeksSN74CBT16811CDLR
Worldwide	DigiKey	1k
TI Lead Time*: 15 WeeksSN74CBT16811CDLRG4
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
74CBT16811CDGGRE4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
74CBT16811CDGGRG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
74CBT16811CDGVRE4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
74CBT16811CDGVRG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
SN74CBT16811CDGGR	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
SN74CBT16811CDGVR	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
SN74CBT16811CDL	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
SN74CBT16811CDLG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
SN74CBT16811CDLR	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
SN74CBT16811CDLRG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	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 SN74CBT16811C

Datasheet

SN74CBT16811C (Rev. C) (PDF, 371 KB)
15 Oct 2003

Application Notes

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User Guides

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Signal Switch Data Book (Rev. A) (PDF, 18396 KB) 9501 views
14 Nov 2003

Selection Guides

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23 Jul 2009

More Literature

Logic Cross-Reference (Rev. A) (PDF, 2938 KB) 15250 views
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10 Nov 2004

Simulation Models

IBIS Model
- SN74CBT16811C IBIS Model (Rev. B) (Multiple File Format) 165 views
  24 Jun 2003 Read Abstract

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SN74CBT16811C Status: ACTIVE

24-Bit FET Bus Switch with Precharged Outputs and -2 V Undershoot Protection

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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