UPD4702 Overview
Description
The µPD4702 is 8-bit up/down counters for an incremental encoder. Two-phase (A, B) incremental input signals are phase-differentiated, and on each signal edge, an up-count is executed if the A phase is leading, or a down-count if the B phase is leading.
Key Features
- Incremental inputs (A, B)
- On-chip phase discrimination circuit (up-count mode when the phase order is A → B, down-count mode when B → A) 4-multiplication count method
- On-chip edge detection circuit
- 8-bit up/down counter latch output o Carry output, borrow output
- Count data output controllable (3-state output)
- CMOS, single +5 V power supply
