Datasheet > DS99144

DS99144

更新时间： 2024-01-16 07:42:38

品牌	Logo	应用领域
杰尔 - AGERE		驱动器
页数	文件大小	规格书
16页	245K
描述
QUAD DIFFERENTIAL DRIVERS

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DS99144 数据手册

Data Sheet

January 1999

Quad Differential Drivers

BDG1A, BDP1A, BDGLA, BPNGA, BPNPA, and BPPGA

26LS31, but offer increased speed, decreased power

consumption, and significantly lower levels of electro-

magnetic interference (EMI). They replace the Agere

41 Series drivers.

Features

■ Pin-equivalent to the general-trade 26LS31 device,

with improved speed, reduced power consumption,

and significantly lower levels of EMI

The BDG1A device is the generic driver in this family

and requires the user to supply external resistors on

the circuit board for impedance matching.

■ Four line drivers per package

■ Meets ESDI standards

The BDGLA is a low-power version of the BDG1A,

reducing the power requirement by more than one

half. The BDGLA features a 3-state output with a typ-

ical third-state level of 0.2 V.

■ 2.0 ns maximum propagation delay

■ Single 5.0 V ± 10% supply

■ Operating temperature range: −40 °C to +125 °C

The BDP1A is equivalent to the BDG1A but has

220 Ω termination resistors to ground on each driver

output. This eliminates the need for external pull-

down resistors when driving a 100 Ω impedance line.

(wider than the 41 Series)

■ 400 Mbits/s maximum data rate

■ Logic to convert TTL input logic levels to differen-

tial, pseudo-ECL output logic levels

The BPNGA and BPNPA are equivalent to the

BDG1A and BDP1A, respectively, except that a light-

ning protection circuit has been added to the driver

outputs. This circuit will absorb large transitions on

the transmission lines without destroying the device.

■ No line loading when VCC = 0 (BDG1A, BDP1A

only)

■ High output driver for 50 Ω loads

■ <0.2 ns output skew (typical)

■ On-chip 220 Ω loads available

■ Third-state outputs available

The BPPGA combines the features of the BPNGA

and BPNPA. Two of the gates have their outputs ter-

minated to ground through 220 Ω resistors while the

two remaining gates require external termination

resistors.

■ Surge-protection to ±60 V for 10 ms available

(BPNGA, BPNPA, BPPGA)

When the BDG1A and the BDP1A devices are pow-

ered down, the output circuit appears as an open cir-

cuit relative to the power supplies; hence, they will

not load the transmission line. For those circuits with

termination resistors, the line will remain impedance

matched when the circuit is powered down. The

BPNGA, BPNPA, BPPGA, and BDGLA will load the

transmission line, because of the protection circuit,

when the circuit is powered down.

■ Available in four package types

■ ESD performance better than the 41 Series

■ Lower power requirement than the 41 Series

Description

These quad differential drivers are TTL input-to-

pseudo-ECL-differential-output used for digital data

transmission over balanced transmission lines. All

devices in this family have four drivers with a single

enable control in a common package. These drivers

are compatible with many receivers, including the

Agere Systems Inc. 41 Series receivers and trans-

ceivers. They are pin equivalent to the general-trade

The packaging options that are available for these

quad differential line drivers include a 16-pin DIP; a

16-pin, J-lead SOJ; a 16-pin, gull-wing SOIC; and a

16-pin, narrow-body, gull-wing SOIC.

12 3 4 5 6 7...16

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