MC100H680中文资料MC100H680: 4-Bit Differential ECL Bus/TTL Bus Transceiver数据手册ONSEMI规格书

描述 Description

The MC10H/100H680 is a dual supply 4-bit differential ECL bus to TTL bus transceiver. It is designed to allow the system designer to no longer be limited in bus speed associated with standard TTL busses. Using a differential ECL Bus will increase the frequency of operation and increase noise immunity. Both the TTL and the ECL ports are capable of driving a bus. The ECL outputs have the ability to drive 25 ?, allowing both ends of the bus line to be terminated in the characteristic impedance of 50 ?. The TTL outputs are specified to source 15mA and sink 48 mA, allowing the ability to drive highly capacitive loads. The ECL output levels are VOH approximately equal to -1.0V and VOL cutoff equal to -2.0 V (VTT). When the ECL ports are disabled both EIOx and EIOxB go to the VOL cutoff level. The ECL input receivers have special circuitry which detects this disabled condition, prevents oscillation, and forces the TTL output to the low state. The noise margin in this disabled state is greater than 600 mV. Multiple ECL VCCO pins are utilized to minimize switching noise. The TTL ports have standard levels. The TTL input receivers have PNP input devices to significantly reduce loading. Multiple TTL power and ground pins are utilized to minimize switching noise. The control pins (EDIR and ECEB) of the 10H version is compatible with MECL 10H ECL logic levels. The control pins of the 100H version are compatible with 100K levels.

特性 Features

Differential ECL Bus (25 W) I/O Ports PIN DESCRIPTIONS
High Drive TTL Bus I/O Ports Pin Symbol
Extra TTL and ECL Power/Ground Pins to Minimize 1 GT1 Switching Noise 2 TIO0
Dual Supply 3 TDIR
Direction and Chip Enable Control Pins 4 EDIR 5 EIO0 6 VCCO1
Pb-Free Packages are Available

简介

MC100H680属于集成电路（IC）的转换器电平移位器。由制造生产的MC100H680转换器，电平移位器逻辑转换器或电平移位器 IC 可用于在数字逻辑设备之间传递信息，这些设备可在不同/不兼容的供电电压下工作，或可实现不同的信令方式。例如，可以将需要 5 V 电源的数字输出传感器连接到具有 3.3 V I/O 电源的 FPGA，或者在 CMOS 或 TTL 等单端信令方式与 PECL 或 LVDS 等差分技术之间进行转换。