SN65HVS880 Datasheet, PDF (1/24 Pages) Texas Instruments – 24 V, EIGHT-CHANNEL DIGITAL-INPUT SERIALIZER

Typical Size
6.4 mm X 9.7 mm
SN65HVS880
www.ti.com .......................................................................................................................................................... SLAS592B – MARCH 2008 – REVISED JUNE 2008
24 V, EIGHT-CHANNEL DIGITAL-INPUT SERIALIZER
FEATURES
1
•2 Eight Sensor Inputs
– High Input Voltage up to 30 V
– Selectable Debounce Filters From 0 ms to
3 ms
– Adjustable Current Limits From 0.2 mA to
5.2 mA
– Field Inputs and Supply Lines Protected to
15-kV HBM
• Output Drivers for External Status LEDs
• Cascadable for More Inputs in Multiples of
Eight
• SPI-Compatible Interface
• Regulated 5-V Output for External Digital
Isolator
• Over-Temperature and Low-Supply Voltage
Indicator
APPLICATIONS
• Sensor Inputs for Industrial Automation and
Process Control
– IEC61131-2 Type 1, 2, or 3 Switches
– EN60947-5-2 Proximity Switches
• High Channel Count Digital Input Modules for
PC and PLC Systems
• Decentralized I/O Modules
DESCRIPTION
The SN65HVS880 is a 24-V, eight-channel, digital-input serializer for high-channel density digital input modules
of PC and PLC based systems in industrial automation. In combination with galvanic isolators the device
completes the interface between the 24-V sensor outputs of the field-side and the low-voltage controller inputs at
the control-side. Input signals provided by EN60947-5-2 compliant 2- and 3-wire proximity switches are
current-limited and then validated by internal debounce filters. The input switching characteristic is in accordance
with IEC61131-2 for Type 1, 2, and 3 sensor switches.
Upon the application of load and clock signals, input data is latched in parallel into the shift register and
afterwards clocked out serially via a subsequent isolator into a serial PLC input.
Cascading of multiple SN65HVS880 is possible by connecting the serial output of the leading device with the
serial input of the following device, enabling the design of high-channel count input modules. Input status is
indicated via 3-mA constant current LED outputs. An external precision resistor is required to set the internal
reference current. The integrated voltage regulator provides a 5-V output to supply low-power isolators. An
on-chip temperature sensor together with an internal supply voltage monitor provides a chip-okay (CHOK)
indication.
The SN65HVS880 comes in a 28-pin PWP PowerPAD™ package allowing for efficient heat dissipation. The
device is specified for operation at temperatures from –40°C to 85°C.
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PowerPAD is a trademark of Texas Instruments.
2
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2008, Texas Instruments Incorporated