AK8172A

Overview

The AK8172A is a single clock generator IC manufactured by Asahi Kasei Microdevices (AKM). It integrates a Phase-Locked Loop (PLL) to generate a precise 72.36 MHz output clock from a 27.000 MHz input frequency without requiring an external crystal oscillator. The device operates within a supply voltage range of 1.7 V to 1.9 V and consumes approximately 3.6 mA of current. It features low jitter performance, specified at 15 ps typical period jitter (1σ), and supports an operating temperature range from -20°C to +85°C. The component is housed in a compact 4-pin USON package with dimensions of 1.3 mm x 1.1 mm.

Feature Summary

• Integrated PLL generates 72.36 MHz output from 27 MHz input without external crystal
• Low jitter performance: 15 ps typical period jitter (1σ)
• Low current consumption: 3.6 mA typical
• Compact 4-pin USON package (1.3 mm x 1.1 mm)

Applications

• Digital still cameras

Procurement Notes

Verify the specific ordering suffix for packaging requirements. The datasheet lists the AK8172AU variant shipped in tape and reel format. Confirm that the application environment stays within the recommended operating temperature range of -20°C to +85°C and supply voltage limits of 1.7 V to 1.9 V to ensure functional reliability.

Selection Notes

Select this component when a fixed 72.36 MHz clock is required from a 27 MHz source in space-constrained designs. Ensure the input clock duty cycle remains between 30% and 70% at VDDI/2. The load capacitance on the CLKOUT pin must not exceed 15 pF. Verify compatibility with the 1.7-1.9 V supply voltage range against system power rails.

Part Context

The AK8172A belongs to AKM's series of single clock generators designed for mixed-signal applications. It eliminates the need for external resonators by utilizing an internal PLL architecture. This integration reduces board space and simplifies design compared to discrete clock generation solutions, targeting portable consumer electronics where size and power efficiency are critical constraints.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Consult AKM sales offices for current status or alternative recommendations.