The document describes the features and characteristics of the Intersil HD-15531, a high-performance CMOS device designed for MIL-STD-1553 and similar Manchester II encoded, time division multiplexed serial data protocols. This chip offers variable frame length, sync identification and lock-in, separate encode and decode functions, and low operating power.
The HD-15531 is a high‑performance CMOS device that provides both Manchester encoding and decoding for MIL‑STD‑1553 and other digital data communications. It offers programmable word lengths from 2 to 28 bits, selectable even/odd parity, and operates at low power (50 mW at 5 V).
The document includes pin‑out diagrams, detailed pin descriptions, encoder and decoder operation timing, frame‑counter tables, test load circuits, ordering information, and contact details for Intersil worldwide.
| Data Rate (15531) | 1.25 Megabit/s |
|---|---|
| Data Rate (15531B) | 2.5 Megabit/s |
| Operating Power | 50 mW at 5 V |
| Temperature Range (PDIP) | -40 °C to 85 °C |
| Temperature Range (CERDIP) | -55 °C to 125 °C |
| Word Length | Programmable 2‑28 bits |
| Parity Selection | Even or odd selectable |
The device consumes 50 mW when powered at 5 V.
Word length is set by programming the COUNT inputs to select 2‑28 data bits.