Datasheet > SCANH16602SM

SCANH16602SM

更新时间： 2024-11-21 03:18:51

品牌	Logo	应用领域
美国国家半导体 - NSC		总线收发器
页数	文件大小	规格书
9页	132K
描述
Low Voltage Universal 16-bit IEEE 1149.1 Bus Transceiver with TRI-STATE-R Outputs

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SCANH16602SM 数据手册

July 2003

SCAN16602

Low Voltage Universal 16-bit IEEE 1149.1 Bus

Transceiver with TRI-STATE^®Outputs

General Description

Features

n IEEE 1149.1 (JTAG) Compliant

n 2.7V to 3.6V V_CCOperation

The SCAN16602 is a high speed, low-power universal bus

transceiver featuring data inputs organized into two 8-bit

bytes with separate output enable and latch enable control

signals. The byte-wide output enable controls are compli-

mentary to allow direction control with a single R/W line and

no additional logic. This function is configurable as a D-type

Latch or Flip-Flop, and can operate in transparent, latched,

or clocked mode. This device is compliant with IEEE 1149.1

Standard Test Access Port and Boundary Scan Architecture

with the incorporation of the defined boundary-scan test

logic and test access port consisting of Test Data Input (TDI),

Test Data Out (TDO), Test Mode Select (TMS), Test Clock

(TCK), and Test Reset (TRST).

n TRI-STATE outputs for bus-oriented applications

n Dual byte-wide data for bus applications

n Power down high Impedance inputs and outputs

n Optional Bus Hold on data inputs eliminates the need

for external pullup/pulldown resistors (SCANH16602,

SCANH162602 versions)

n Optional 25Ω series resistors in outputs to minimize

noise and eliminate termination resistors (SCAN162602,

SCANH162602 versions)

n Supports live insertion/withdrawal

n Includes CLAMP and HIGHZ instructions

Block Diagram

20051802

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

DS200518

www.national.com

12 3 4 5 6 7...9

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