The HD-4702/883 is a programmable bit rate generator that provides 13 commonly used bit rates, using a 2.4576MHz crystal/input to produce standard frequency output (16 times bit rate), low operating current, and conforms to EIA RS-404 standards.
The HD-4702/883 is a CMOS programmable bit‑rate generator designed for digital data transmission systems such as UARTs. It provides 13 commonly used bit rates and can generate a 16‑times higher output clock from a 2.4576 MHz crystal or external input. The device supports up to eight transmission channels and includes an on‑chip initialization circuit for diagnostic fault detection.
Key specifications include a supply voltage range of +4.5 V to +5.5 V, operating temperature from –55 °C to 125 °C, and a 16‑lead CERDIP package. Detailed electrical performance data cover DC and AC parameters, propagation delays, and output transition times. The document also contains pinout diagrams, truth tables for rate selection, and handling precautions for electrostatic discharge.
| Supply Voltage Range | +4.5 V to +5.5 V |
|---|---|
| Operating Temperature Range | -55 °C to 125 °C |
| Crystal/Input Frequency | 2.4576 MHz |
| Output Frequency (16× Bit Rate) | 2.4576 MHz |
| Package | 16‑lead CERDIP |
It uses a 2.4576 MHz crystal or external input to generate the required clock signals.
The device operates from –55 °C to 125 °C.