Texas Instruments SN65HVS883PWP

Overview

SN65HVS883 from Texas Instruments is an eight-channel, 24 V digital-input serializer for industrial PLC and PC-based I/O modules. It accepts field inputs up to 34 V, provides selectable debounce (0–3 ms), adjustable input current limiting (0.2–5.2 mA), and integrates a 5-V linear regulator with 50 mA output. It serves as the front-end interface between 24-V sensors and isolated microcontroller SPI buses in high-density digital input systems.

For engineers reviewing the SN65HVS883 datasheet, SN65HVS883 pinout, SN65HVS883 application, or SN65HVS883 equivalent, key selection considerations include IEC61131-2 Type 1/2/3 compliance, cascading capability for >8-channel modules, field-side ESD protection (15-kV HBM on IPx/V24), serial shift timing (100 MHz max CLK), and integrated CHOK supply monitor output.

Technical Context

The SN65HVS883 implements a parallel-load/serial-shift architecture with two distinct functional modes: Load mode (LD low) latches all eight field inputs (IP0–IP7) into an internal shift register, while Shift mode (LD high, CE low) clocks data out serially via SOP on rising/falling CLK edges. Input conditioning includes analog current-limiting (via external RLIM resistor) and digital debounce filtering controlled by DB0/DB1 logic levels.

Its integrated 5-V linear regulator (5VOP) supplies external digital isolators with ±2% regulation over 18–34 V input and supports up to 50 mA load; the CHOK output asserts low when V24 drops below 15 V (with 1-ms debounce) and returns high after 6 ms when V24 exceeds 18 V. All eight REx outputs deliver constant-current (2.8–3.5 mA) LED drive referenced to FGND.

Key Specifications

Pinout & Package

The SN65HVS883 is housed in a 28-pin HTSSOP (PWP) PowerPAD™ package (9.70 mm × 4.40 mm) with exposed thermal pad for enhanced heat dissipation in high-channel-density modules.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar digital-input serializer applications.

Compared with SN65HVS882 and AD7403, the SN65HVS883 uniquely combines eight-channel serialization, integrated 5-V regulation, supply monitoring (CHOK), and IEC61131-2 compliance in a single HTSSOP package-making it the only drop-in solution for scalable, standards-compliant industrial digital input modules.

Availability

SN65HVS883 is available at Aetrix Electronics and suitable for industrial PLC modules, decentralized I/O nodes, and PC-based data acquisition systems requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for SN65HVS883 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and connectivity technologies for industrial, automotive, and communications markets.

The SN65HVS883 belongs to TI's industrial interface portfolio, designed specifically to simplify high-density, robust digital input acquisition in harsh factory environments-enabling seamless integration with galvanic isolators and microcontrollers.

FAQ

What is the maximum field input voltage supported by the SN65HVS883?

The SN65HVS883 supports field input voltages up to 34 V on all eight IPx pins. This rating is validated per absolute maximum ratings and ensures reliable operation with industrial 24-V sensors, including IEC61131-2 Type 3 switches and EN60947-5-2 proximity devices. Operation above 34 V risks permanent damage, and the device includes ±15-kV HBM ESD protection on these pins to withstand transient overvoltages common in factory settings. The SN65HVS883 maintains correct logic interpretation across its full 0–34 V input range.

How does the debounce function work on the SN65HVS883?

The SN65HVS883 implements configurable digital debounce using two control inputs-DB0 and DB1-to select delay times of 0 ms (filter bypassed), 1 ms, or 3 ms for all eight input channels simultaneously. Any new input state must persist for the full selected duration before being latched into the shift register, eliminating false triggers from mechanical contact bounce or EMI-induced glitches. The debounce logic operates independently of the serial interface timing and is applied prior to parallel loading. The SN65HVS883 datasheet specifies exact timing behavior and truth table for DB0/DB1 combinations.

Can multiple SN65HVS883 devices be connected together?

Yes, the SN65HVS883 supports daisy-chaining via its serial interface: the SOP (serial output) of one device connects directly to the SIP (serial input) of the next. This enables scalable digital input modules-for example, four SN65HVS883 devices provide 32 channels using only three control lines (CLK, LD, CE) and one data line. Each additional device adds eight bits to the serial stream, requiring eight extra clock cycles per device. The SN65HVS883's timing specifications account for cascaded operation, and no PCB layout changes are needed beyond routing SOP→SIP interconnects.

What is the purpose of the CHOK pin on the SN65HVS883?

The CHOK (Chip Okay) pin is an open-drain output that indicates the health of the V24 field supply. It asserts low when V24 drops below 15 V (with 1-ms debounce) and returns high after 6 ms once V24 rises above 18 V. If V24 falls below 10 V, the device ceases operation entirely. CHOK provides early warning of supply degradation before system-level brownout, enabling PLC controllers to initiate safe shutdown or alarm sequences. This feature is integral to the SN65HVS883's design for industrial reliability and is not replicated in lower-tier alternatives like the SN65HVS882.

How is the input current limit set on the SN65HVS883?

The input current limit on the SN65HVS883 is set externally using a single resistor (RLIM) connected between the RLIM pin and FGND. The relationship is defined as I_LIM = 90 V / R_LIM, allowing adjustment from 0.2 mA (R_LIM = 450 kΩ) to 5.2 mA (R_LIM = 17.3 kΩ). A typical value of 25 kΩ yields 3.6 mA, matching IEC61131-2 Type 1/3 trip points. The SN65HVS883's internal current mirror architecture ensures consistent channel-to-channel matching, and the RLIM resistor also sets the reference for input threshold hysteresis.