DS31256 datasheet(1/183 Pages) MAXIM

部件名	DS31256

功能描述	256-Channel, High-Throughput HDLC Controller

PDF	183 Pages

Scroll/Zoom	100%

制造商	MAXIM [Maxim Integrated Products]

网页	https://www.maximintegrated.com/en.html

标志

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REV: 031405

Note: Some revisions of this device may incorporate deviations from published specifications known as errata. Multiple revisions of any device

may be simultaneously available through various sales channels. For information about device errata, click here: www.maxim-ic.com/errata.

GENERAL DESCRIPTION

The DS31256 Envoy is a 256-channel HDLC

controller that can handle up to 60 T1 or 64 E1

data streams or two T3 data streams. Each of the

16 physical ports can handle one, two, or four

T1 or E1 data streams. The DS31256 is

composed of the following blocks: Layer 1,

HDLC processing, FIFO, DMA, PCI bus, and

local bus.

There are 16 HDLC engines (one for each port)

that are each capable of operating at speeds up

to 8.192Mbps in channelized mode and up to

10Mbps in unchannelized mode. The DS31256

Envoy also has three fast HDLC engines that

only reside on Ports 0, 1, and 2. They are

capable of operating at speeds up to 52Mbps.

APPLICATIONS

Channelized and Clear-Channel

(Unchannelized) T1/E1 and T3/E3

Routers with Multilink PPP Support

High-Density Frame-Relay Access

xDSL Access Multiplexers (DSLAMs)

Triple HSSI

High-Density V.35

SONET/SDH EOC/ECC Termination

ORDERING INFORMATION

PART

TEMP RANGE

PIN-PACKAGE

DS31256

0°C to +70°C

256 PBGA

FEATURES

§ 256 Independent, Bidirectional HDLC

Channels

§ Up to 132Mbps Full-Duplex Throughput

§ Supports Up to 60 T1 or 64 E1 Data Streams

§ 16 Physical Ports (16 Tx and 16 Rx) That

Can Be Independently Configured for

Channelized or Unchannelized Operation

§ Three Fast (52Mbps) Ports; Other Ports

Capable of Speeds Up to 10Mbps

(Unchannelized)

§ Channelized Ports Can Each Handle One,

Two, or Four T1 or E1 Lines

§ Per-Channel DS0 Loopbacks in Both

Directions

§ Over-Subscription at the Port Level

§ Transparent Mode Supported

§ On-Board Bit Error-Rate Tester (BERT)

with Automatic Error Insertion Capability

§ BERT Function Can Be Assigned to Any

HDLC Channel or Any Port

§ Large 16kB FIFO in Both Receive and

Transmit Directions

§ Efficient Scatter/Gather DMA Maximizes

Memory Efficiency

§ Receive Data Packets are Time-Stamped

§ Transmit Packet Priority Setting

§ V.54 Loopback Code Detector

§ Local Bus Allows for PCI Bridging or Local

Access

§ Intel or Motorola Bus Signals Supported

§ Backward Compatibility with DS3134

§ 33MHz 32-Bit PCI (V2.1) Interface

§ 3.3V Low-Power CMOS with 5V Tolerant

I/O

§ JTAG Support IEEE 1149.1

§ 256-Pin Plastic BGA (27mm x 27mm)

Features continued on page 6.

DS31256

256-Channel, High-Throughput

HDLC Controller

www.maxim-ic.com

DEMO KIT AVAILABLE

类似零件编号 - DS31256

制造商	部件名	数据表	功能描述
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	DS31256	1Mb / 183P	256-Channel, High-Throughput HDLC Controller REV: 012506

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