µPD17P709A is a replacement for the µPD17704A, 17705A, 17707A, 17708A, and 17709A, and has a 32KB one-time PROM for low-volume production.
The uPD17P709A is a 4‑bit single‑chip microcontroller from NEC that integrates a one‑time PROM of 32 KB, a range of timers, A/D and D/A converters, and multiple serial interfaces. It is compatible with the uPD17704A‑17709A family and is intended for low‑volume production or pre‑production use.
The document provides functional outlines, pin configurations, electrical specifications, package drawing, and recommended soldering conditions. It also includes programming procedures for the one‑time PROM and details on interrupt sources, timers, and peripheral pins.
| Supply voltage (Vop) | 5 V ±10 % |
|---|---|
| On‑chip one‑time PROM size | 32 KB (16384 × 16 bits) |
| Package type | 80‑pin plastic QFP (14 × 14 mm) |
| General‑purpose I/O ports | 46 total (12 input, 4 output) |
| Instruction execution time | 1.78 µs (with 4.5 MHz crystal) |
| General‑purpose RAM | 672 × 4 bits |
The device operates with a Vop of 5 V ±10 %.
It provides 46 I/O ports, of which 12 are inputs and 4 are outputs.
The on‑chip one‑time PROM is 32 KB (16384 × 16 bits).
It is supplied in an 80‑pin plastic QFP package measuring 14 mm × 14 mm.