Texas Instruments 4Q 2006 manual Vme, Highlights

Page 41

Design Considerations

Backward compatibility — The VMEH22501/A improves the performance up to 8X of the VMEbus™ without making changes to existing hardware.

Standard Specification — The VMEH22501/A are referenced by the 2eSST VITA 1.5 spec as a device that provides excellent signaling at 40-Mbps data rate.

Increased Noise Immunity — The ±50-mV input threshold allows the VMEH22501/A to provide clean signaling under harsh environments.

Full Live Insertion—This device is fully specified for live-insertion applications using IOFF, power-up 3-state and BIAS VCC.

Speed/Signal Integrity—High-speed backplane operation is a direct result of the improved OEC circuitry that has been tested on the standard VME backplane. Furthermore, signal integrity is not compromised with higher speed operation.

VME 41

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Technical Information

•TI’s SN74VMEH22501/A are specifically designed for the VMEbus technology. The device is an 8-bit universal bus transceiver (UBT) with two bus transceivers. It provides incident switching on the 21-slot VMEbus backplane, thus providing data signaling rates of up to 40 Mbps-—an 8X improvement over the VME64 standard.

Highlights

• Ability to transmit data on the VMEbus

up to 2eSST protocol speed is an

improvement over VME64.

• Incident wave switching allows for higher

VME Parametric Table
Parameter Name	SN74VMEH22501	SN74VMEH2501A
Voltage Nodes (V)	3.3	3.3
VCC Range (V)	3.15 to 3.45	3.15 to 3.45
Input Level	LVTTL	LVTTL
Output Level	LVTTL	LVTTL
Output Drive (mA)	–48/64	–48/64
No. of Outputs	10	10
Logic	True	True
Static Current (mA)	30	30
tpd max (ns)	8.9	8.9
TA	0° C to 85° C	–40° C to 85° C

Resources For a complete list of resources (evaluation modules, data sheets and application notes), visit interface.ti.com

Literature Number	Description
Application Notes
SCEA028	VMEH22501 in 2eSST and Conventional VME Backplane Applications
Other Literature
SCYB009	VME Application Clip

performance on the VMEbus compared to

conventional logic that depends on

reflective wave switching.

Texas Instruments 4Q 2006

Interface Selection Guide

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Contents Interface Selection Guide Interface Selection Guide Table of ContentsClock Distribution Circuits p Interface Selection GuideDesign Considerations LVDS, xECL, CMLTechnical Information Lvds Family of ProductsTexas Instruments 4Q Pecl Selection GuideLvds Selection Guide Device Pin/Packages Price Single Family SupplyDual Family Quad FamilyMultipoint-LVDS M-LVDS Lvds FeaturesMultipoint Lvds Lvds Devices from TIPart-to HalfKey Features Mbps Jitter To ensure signal integrityDigital Isolators Digital Isolators Selection GuideRS-485/422 Family of Products RS-485/422No. Dr/Rx FeaturesNodes SoicRS-232 Flexible power-saving options enable longer battery lifeRS232 IEC6100-4-2 Level ESD-Protected Devices Space-saving QFN package options for portable applicationsPin/Packages Price DeviceDrivers Receivers Pin/Package Price RS-232 Selection GuideUARTs Universal Asynchronous Receiver/Transmitters Programmable sleep mode and low-power modeUart Family of Products 64-byte FIFOs available 3-, 2.5- and 1.8-V supplyUart Selection Guide UARTs Universal Asynchronous Receiver/TransmittersAsynchronous Communications Element with Autoflow Control PDAs MP3 players Gaming systems Modems Serial ports TelecomCan Transceiver Selection Guide Can 3.3-V and 5-V High-Speed can TransceiversSelection Guide Standard Compliant ProtocolsFlatLinkTM 3G Display SerDes for Mobile Phones Flatlink 3GFlatLink 3G Selection Guide 1755SerDes Serial Gigabit Transceivers and Lvds SerDes Solutions-Frontplane/BackplaneBuffer PhotoGigabit Ethernet/FibreChannel SerDes Serial Gigabit Transceivers Selection GuideGigabit Xaui Ethernet Lvds SerdesContent protection for video sent over DVI High Bandwidth Digital Content Protection Hdcp22 DVI/PanelBus Hdcp ElementsSet-top boxes Desktop LCD monitors DLP and LCD projectors Digital TVsDigital visual interface DVI compliant Jitter Intra-Pair ps Inter-Pair Clock P-P Data P-PMax ps 40QFNSpeed Universal Serial Bus USBTransfer Type USB-to-Serial BridgePackage USB Hub Controllers and Peripheral DevicesUSB Family of Products Port USB Hub Power Controllers USB Power Managers Family of ProductsUSB Power Managers Selection Guide Universal Serial Bus USB Power ManagersClassifications PCI ExpressDevice Target Markets PCI ExpressKey Benefits ExpressCards PC Add-In Cards PC Motherboards Target MarketRX Block Painful and not robustTX Block Two 32-bit, 33- or 66-MHz buses PCI BridgesCapabilities FunctionalityPower Distribution Devices Family of Products CardBus Power SwitchesIN1 to IN2 Enable PredecessorTransition Time Physical-Layer Selection Issues 36 1394 FireWireLink-Layer Selection Issues OverviewReal-time streaming of audio and video 1394b AdvantagesFaster speeds from 800 Mbps to 3200 Mbps More efficient Boss arbitration Key Features Applications FireWireConn. Conn. Conn. Conn. Conn. Conn Signal Integrity TI vs CompetitionGtlp Selection Guide Gtlp Gunning Transceiver Logic PlusDevice Description Price Other LiteratureHighlights VMEClock Distribution Circuits SN65HVD3082E SN65HVD3085ESN65HVD3088E Cross-Reference GuideSN65LVDT3486B Cross-Reference GuideSN65LVDT9637B PericomTexas Instruments Device IndexProduct Information Centers InternetImportant Notice