The DS1087L is a clock generator from Maxim company. It can produce a square wave output of frequencies from 130kHz to 66.6MHz. The clock generator uses 2% or 4% of dither output and can be programmed through a 2-wire serial interface. There is an internal frequency divider and it can be programmed. The clock generator can operate in power-down and output-enable mode, which is perfect for power-sensitive applications.
The DS1087L is a clock generator that produces a spread‑spectrum (dithered) square‑wave output covering frequencies from 130 kHz to 66.6 MHz. It is factory‑programmed but allows user adjustment of the frequency divider, dither percentage (2 % or 4 %), and output power‑down/disable mode via a 2‑wire serial interface. All settings are stored in non‑volatile EEPROM, making the device suitable for stand‑alone applications.
The device operates from a 2.7 V to 3.6 V supply and includes dedicated pins for output enable (OE), power‑down (PDN), and dither control (SPRD). Electrical characteristics, pin assignments, register maps and 2‑wire bus timing are detailed in the datasheet, providing all information needed for hardware designers and firmware engineers.
| Supply voltage (VCC) | 2.7 V – 3.6 V |
|---|---|
| High‑level output voltage (OUT) | ≥ 2.4 V (at I_OH = –4 mA) |
| Standby (power‑down) current | 5 µA |
| Dither selectable | 2 % or 4 % of carrier frequency |
The OE pin gates the output buffer, while the PDN pin powers the master oscillator down; setting OE high enables the output and setting PDN low disables it.
It operates from a 2.7 V to 3.6 V supply.