Integrated Circuits

FEATURES

l ACTIVE **-Line TERMINATOR

l 2pF CAPACITANCE PER LINE

IMPORTANT FOR SCSI FAST**0

l ON-CHIP TERMINATION RESISTORS

l ALL TERMINATIONS DISCONNECT WITH

SINGLE LOGIC SIGNAL

l **5mA CURRENT SINKING FOR ACTIVE

NEGATION

l *2.4mA PER LINE DURING ASSERTION

l CURRENT LIMIT AND THERMAL LIMIT

l HOT-SOCKET CAPABLE

l **-Lead SOIC and SSOP PACKAGES 

DESCRIPTION

The REG***8 is a low capacitance **-line active

terminator for SCSI (Small Computer Systems

Interface) parallel bus systems. On-chip resistors and

voltage regulator provide the prescribed SCSI bus

termination. Low line capacitance (2pF) meets

requirements for high data rate systems.

All terminations can be disconnected from the bus

with a single logic control line. In the disconnect

mode, output lines remain high impedance with or

without power applied. This allows “hot socket”

equipment plugging as required for “plug and play”

applications.

The internal voltage regulator is temperature-compensated

to assure proper termination characteristics over

a wide operating range. Output current and thermal

limit circuitry protect against damage.

The REG***8 is available in **-lead SOIC and

fine-pitch SSOP packages and is specified for 0°C to

*0°C