CMCPCI102BT California Micro Devices Corporation, CMCPCI102BT Datasheet

CMCPCI102BT

Manufacturer Part Number

CMCPCI102BT

Description

TSSOP28

Manufacturer

California Micro Devices Corporation

Datasheets

1.CMCPCI102BT.pdf (8 pages)

2.CMCPCI102BT.pdf (8 pages)

Specifications of CMCPCI102BT

Date_code

07+

Current page: 1 of 8
Download datasheet (225Kb)

Features

•

Applications

•

02/28/05

Simplified Electrical Schematic

CompactPCI ® standards compliant

Allows CompactPCI System Cards to be

used in any Slot

Provides termination for up to ten channels

Provides a series switch in each channel

Supports hot-swap capability

Very low capacitance load on each line

Industrial temperature range

28-pin TSSOP package

Lead-free version available

Redundant System CompactPCI ® cards

Hot-swap CompactPCI cards

Industrial PCs

Telecom/Datacom equipment

Instrumentation

Computer Telephony

Real-time machine control

For all Enable signals:

Logic 0 = switch open

Logic 1 = switch closed

430 N. McCarthy Blvd., Milpitas, CA 95035-5112

*One of 10 parallel

channels is shown.

A1-A10*

CompactPCI

Backplane Side

SW_EN

P_EN

●

Backplane Interface

Tel: 408.263.3214

10kΩ

PU1

10Ω

Product Description

The CMCPCI102BT/BR is a 10-channel backplane

interface/termination IC specifically designed for Com-

pactPCI

CMCPCI102BT/BR allows CompactPCI boards to

interface to the backplane and provides the versatility

to use system cards in any slot (system or peripheral).

Per the CompactPCI specification, the CMCPCI102BT/

BR provides a 10Ω termination resistor for each chan-

nel to terminate the transmission line stub on the

board. An integral series switch and associated control

signal (SW_EN) permits connection/disconnection of

the channel, so that the device side of the circuit may

be isolated from the backplane side.

The CompactPCI standard requires system boards to

be hot-swappable. To accommodate this requirement,

the CMCPCI102BT/BR features a switched 10kΩ resis-

tor connected to the 1V Precharge Supply Voltage. If

the precharge enable pin (P_EN) is asserted, then the

10kΩ pull-up resistors are connected to precharge the

circuits.

In addition, a system board requirement mandates

either a 1.0kΩ pull-up resistor or a 2.7kΩ resistor con-

nected to VIO. CompactPCI slot cards must work in

either 3.3V or 5V systems, hence the need for both

2.7kΩ and 1kΩ resistors. If the 3_EN pin is logic high,

the 2.7kΩ resistor is used as the pull-up. If the 5_EN pin

is logic high, the 1kΩ resistor is used.

The CMCPCI102BT/BR integrates all these functions in

a low-profile 28-pin TSSOP package and is available

with optional lead-free finishing.

VIO

●

redundant

Fax: 408.263.7846

CompactPCI Device Side

2.7kΩ

PU2

system-slot

3_EN

1kΩ

●

CMCPCI102B

PU3

www.calmicro.com

cards.

5_EN

B1-B10*

The

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