REG5608 Datasheet, PDF (1/5 Pages) Burr-Brown (TI) – LOW CAPACITANCE 18-Line SCSI ACTIVE TERMINATOR

®
REG5608
REG5608
REG5608
LOW CAPACITANCE 18-Line SCSI
ACTIVE TERMINATOR
FEATURES
q ACTIVE 18-Line TERMINATOR
q 2pF CAPACITANCE PER LINE
IMPORTANT FOR SCSI FAST-20
q ON-CHIP TERMINATION RESISTORS
q ALL TERMINATIONS DISCONNECT WITH
SINGLE LOGIC SIGNAL
q 325mA CURRENT SINKING FOR ACTIVE
NEGATION
q 22.4mA PER LINE DURING ASSERTION
q CURRENT LIMIT AND THERMAL LIMIT
q HOT-SOCKET CAPABLE
q 28-Lead SOIC and SSOP PACKAGES
DESCRIPTION
The REG5608 is a low capacitance 18-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-compen-
sated to assure proper termination characteristics over
a wide operating range. Output current and thermal
limit circuitry protect against damage.
The REG5608 is available in 28-lead SOIC and
fine-pitch SSOP packages and is specified for 0°C to
70°C operation.
TERMPWR
2.9V
Regulator
Disconnect
Thermal
Limit
Current
Limit
Switch
Drive
110Ω
110Ω
110Ω
Reg Out
SCSI
Termination
Lines
(18 lines)
International Airport Industrial Park • Mailing Address: PO Box 11400 • Tucson, AZ 85734 • Street Address: 6730 S. Tucson Blvd. • Tucson, AZ 85706
Tel: [phone] • Twx: 910-952-1111 • Cable: BBRCORP • Telex: 066-6491 • FAX: [phone] • Immediate Product Info: [phone]
© 1995 Burr-Brown Corporation
PDS-1305
Printed in U.S.A. November, 1995