MPC9819EN

Overview

The MPC9819EN is a PLL-based clock generator designed for PowerQUICC and PowerPC microprocessors. It generates processor input clocks and system bus frequencies, including 66 MHz and 133 MHz PCI/X standards. The device features five LVCMOS outputs for processor circuitry and three buffered 25 MHz reference outputs. It accepts a 25 MHz crystal or external reference input. The unit operates on a 3.3 V supply within an extended temperature range of -40°C to +85°C.

Feature Summary

• Generates selectable output frequencies of 66, 100, 125, or 133 MHz via FSEL pins
• Includes five low-skew LVCMOS outputs and three buffered 25 MHz reference outputs
• Supports both external 25 MHz reference sources and integrated Pierce oscillator with a 25 MHz crystal
• Extended operating temperature range from -40°C to +85°C

Applications

• PowerQUICC microprocessor systems
• PowerPC microcontroller applications
• Telecommunications networking equipment

Procurement Notes

This component carries the NRND (Not Recommended for New Designs) designation in official documentation. Verify current availability status through authorized distributors before procurement planning. Existing inventory may be subject to end-of-life constraints.

Selection Notes

Select this part for legacy PowerQUICC or PowerPC designs requiring specific 66 MHz or 133 MHz bus clocks. Ensure the design accommodates the 20-lead SSOP package dimensions. Confirm that the 3.3 V supply voltage aligns with the target system architecture requirements.

Part Context

Originally manufactured by Integrated Device Technology (IDT), this product line was acquired by Renesas Electronics Corporation. The MPC9819 series serves as a specialized timing solution for Freescale/NXP microprocessor families, bridging legacy IDT technology into the Renesas portfolio.

Replacement Considerations

Due to the NRND status, evaluate alternative clock generators compatible with PowerQUICC/PowerPC architectures. Consult manufacturer cross-reference guides for modern replacements offering similar frequency configurations and pinouts.