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DS1088EN-133T

Fixed-Frequency EconOscillator™

Maxim Integrated 

DS1088L

Fixed-Frequency EconOscillator™

Detailed Description

The DS1088L is a low-cost clock generator that pro-

duces a square-wave output without external timing

components. The fixed-frequency oscillator is available in

factory-calibrated frequencies from 312kHz to 133MHz.

The device has a power-down pin for power-sensitive

applications. A block diagram is shown in Figure 1.

Output Frequency

The internal oscillator frequency is divided by the factory-

programmed prescaler to produce an output frequency

of 312kHz to 133MHz. Contact the factory for custom

frequencies.

Power-Down Mode

The PDN pin disables the internal oscillator and the oscil-

lator output for power-sensitive applications. The power-

down pin must remain low for at least two output frequency

cycles plus 10μs for deglitching purposes. On power-up,

the output is disabled until power is stable and the voltage-

controlled oscillator has generated 512 clock cycles.

Applications Information

Power-Supply Decoupling

To achieve the best results when using the DS1088L, the

power supply must be decoupled with 0.01μF and 0.1μF

high-quality, ceramic, surface-mount capacitors. Surface-

mount components minimize lead inductance, which

improves performance, and tend to have adequate high-

frequency response for decoupling applications. These

capacitors should be placed as close as possible to the

VCC and GND pins.

Chip Information

SUBSTRATE CONNECTED TO GROUND

VCC

VCC

VOLTAGE-

EEPROM CONTROLLED

CONTROL OSCILLATOR

PDN

80MHz TO 160MHz

PRESCALER

÷ BY 1, 2, 4...256

GND

DS1088L

OUT

(312kHz

TO 133MHz)

Figure 1. Block Diagram

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