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DS90CR211

更新时间： 2024-11-24 22:50:51

品牌	Logo	应用领域
美国国家半导体 - NSC		/
页数	文件大小	规格书
14页	258K
描述
21-Bit Channel Link

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数据手册

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DS90CR211 数据手册

July 1997

DS90CR211/DS90CR212

21-Bit Channel Link

needed. This provides a 80% reduction in required cable

width, providing a system cost savings, reduces connector

physical size, and reduces shielding requirements due to the

cables smaller form factor.

General Description

The DS90CR211 transmitter converts 21 bits of CMOS/TTL

data into three LVDS (Low Voltage Differential Signaling)

data streams. A phase-locked transmit clock is transmitted in

parallel with the data streams over a fourth LVDS link. Every

cycle of the transmit clock 21 bits of input data are sampled

and transmitted. The DS90CR212 receiver converts the

LVDS data streams back into 21 bits of CMOS/TTL data. At

a transmit clock frequency of 40 MHz, 21 bits of TTL data are

transmitted at a rate of 280 Mbps per LVDS data channel.

The 21 CMOS/TTL inputs can support a variety of signal

combinations. For example, 5 4-bit nibbles plus 1 control, or

2 9-bit (byte + parity) and 3 control.

Features

n Narrow bus reduces cable size and cost

Using

Mbit/s(105 Mbyte/s).

a 40 MHz clock, the data throughput is 840

1V Common mode range (ground shifting)

n 290 mV swing LVDS data transmission

n 840 Mbit/s data throughput

n Low swing differential current mode drivers reduce EMI

n Rising edge data strobe

n Power down mode

n Offered in low profile 48-lead TSSOP package

The multiplexing of the data lines provides a substantial

cable reduction. Long distance parallel single-ended buses

typically require a ground wire per active signal (and have

very limited noise rejection capability). Thus, for a 21-bit wide

data bus and one clock, up to 44 conductors are required.

With the Channel Link chipset as few as 9 conductors (3

data pairs, 1 clock pair and a minimum of one ground) are

Block Diagrams

DS90CR211

DS90CR212

DS012637-27

DS012637-1

Order Number DS90CR211MTD

See NS Package Number MTD48

Order Number DS90CR212MTD

See NS Package Number MTD48

TRI-STATE^®is a registered trademark of National Semiconductor Corporation.

DS012637

www.national.com

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与DS90CR211相关器件

型号	品牌	获取价格	描述	数据表
DS90CR211MDC	NSC	获取价格	IC TRIPLE LINE DRIVER, UUC, DIE, Line Driver or Receiver
DS90CR211MTD	NSC	获取价格	21-Bit Channel Link
DS90CR211MTDX	TI	获取价格	DS90CR211/DS90CR212 21-Bit Channel Link
DS90CR211MWC	NSC	获取价格	暂无描述
DS90CR211MWC	TI	获取价格	TRIPLE LINE DRIVER, UUC, WAFER
DS90CR212	TI	获取价格	DS90CR211/DS90CR212 21-Bit Channel Link
DS90CR212MTD	NSC	获取价格	21-Bit Channel Link
DS90CR212MTDX	TI	获取价格	QUAD LINE RECEIVER, PDSO48, PLASTIC, TSSOP-48
DS90CR212MWC	NSC	获取价格	TRIPLE LINE RECEIVER, UUC, WAFER
DS90CR213	NSC	获取价格	21-Bit Channel LinkΑ66 MHz