DS36954

Features:

Pinout for SCSI interface
Compact 20-pin PLCC or SOIC package
Meets EIA-485 standard for multipoint bus transmission
Greater than 60 mA source/sink currents
Thermal shutdown protection
Glitch-free driver outputs on power up and down




Pinout






Specifications

If Military/Aerospace specified devices are required,pleasecontacttheNationalSemiconductorSalesOffice/Distributors for availability and specifications.
Supply Voltage 7V
Control Input Voltage V_CC + 0.5V
Driver Input VoltageV_CC+ 0.5V
Driver Output Voltage/Receiver Input Voltage-10V to +15V
Receiver Output Voltage 5.5V
Continuous Power Dissipation @ +25
V Package1.73W
M Package 1.73W
Derate V Package13.9 mW/ above +25
Derate M Package 13.7 mW/ above +25
Storage Temperature Range -65 to +150
Lead Temperature
(Soldering 4 Sec.) 260




Description

The DS36954 is a low power, quad EIA-485 differential bus transceiver especially suited for high speed, parallel, multi-point, I/O bus applications. A compact 20-pin surface mount PLCC or SOIC package provides high transceiver integra-tion and a very small PC board footprint.

Propagation delay skew between devices is specified to aid in parallel interface designs-limits on maximum and mini-mum delay times are guaranteed.

Five devices DS36954 can implement a complete SCSI initiator or tar-getinterface.Threetransceiversinapackagearepinnedout for data bus connections. The fourth transceiver, with the flexibility provided by its individual enables, can serve as a control bus transceiver.