TPIC2801 OCTAL INTELLIGENT-POWER SWITCH WITH SERIAL INPUT

SLIS008 - D3282, AUGUST 1989 - REVISED JUNE 1990

features

8-Bit Serial-In Parallel-Out Driver
1-A Output Current Capability Per Channel or 8-A Total Current
OvercurrentLimitingandOut-of-Saturation Voltage Protection on Driver Outputs
Contains Eight Open-Collector Saturating Sink Outputs With Low On-State Voltage
High-Impedance Inputs With Hysteresis Are Compatible With TTL or CMOS Levels
Very Low Standby Power 20 mW Typical
Status of Output Drivers May Be Monitored at Serial Output
3-State Serial Output Permits Serial CascadingorWire-ANDDevice Connections
25-V Transient Clamping With Inductive Switching on Outputs, 40-mJ Rating Per Driver Output

description

The TPIC2801 octal intelligent-power switch is a monolithic BIDFET

integrated circuit designed to sink currents up to 1 A at 30 V simultaneously at each of eight driver outputs under serial input data control. Status of the individual driver outputs is available in serial data format. The driver outputs have overcurrent limiting and out-of-saturation voltage protection features. Applications include driving solenoids, relays, dc motors, lamps, and other medium-current or high-voltage loads.

The device contains an 8-bit serial-in, parallel-out shift register that feeds an 8-bit parallel latch, which independently controls each of the eight Y-output drivers.

Data is entered into the device serially via the serial input (SI) and goes directly into the lowest bit (0) of the shift register. Using proper timing signals, the input data is passed to the corresponding output latch and output driver. A logic-high bit at SI turns the corresponding output driver (Y_n)off. A logic-low bit at SI turns the corresponding output driver on. Serial data is transferred into SI on the high-to-low transition of serial clock (SCLK) input in 8-bit bytes with data for the Y7 output (most significant bit) first and data for Y0 output (least significant bit) last. Both SI and SCLK are active when serial input-output enable (SIOE\) input is low and are disabled when SIOE\ is high.

Each driver output is monitored by a voltage comparator that compares the Y-output voltage level with an internal out-of-saturation threshold voltage reference level. The logic state of the comparator output is dependent upon whether the Y output is greater or smaller than the reference voltage level. An activated driver output is unlatched and turned off when the output voltage exceeds the out-of-saturation threshold voltage level except when the internal unlatch enable is low and disabled. The high-to-low transition of SIOE\ transfers the logic state of the comparator output to the shift register.

Title: OCTAL INTELLIGENT-POWER SWITCH WITH SERIAL INPUT
Product Family: POWERPLUS ARRAYS
Device Functionality: POWER PLUS ARRAY

View the complete PDF datasheet: slis008.pdf (163 K Bytes) (Requires Acrobat Reader 3.x)

View more information about generic part numbers:TPIC2801

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