RTM876-660 PDF – SSOP56, Frequency Generator – Realtek

This post explains for the semiconductor RTM876-660.

The Part Number is RTM876-660.

The function of this semiconductor is 56 pin single-chip frequency generator.

Manufacturer: Realtek Semiconductor Corp ( http://www.realtek.com.tw )

Preview images :RTM876-660 pinout datasheet


A frequency generator is a device or software that is capable of producing electrical signals at various frequencies. It is commonly used in electronics, telecommunications, scientific research, and other fields where precise frequency control is required.

The RTM876-660 is a 56 pin single-chip frequency generator.

Frequency generators can generate signals across a wide range of frequencies, from very low frequencies (in the hertz or millihertz range) to extremely high frequencies (in the gigahertz or terahertz range). They are often used for testing and calibrating electronic equipment, as well as for stimulating and measuring the response of circuits and systems.


RTM876-660 Support Pin Features:
• 2 – Differential pairs push-pull CPU @0.8V or @3.3V
• 6 – Differential pairs push-pull PCI-E @0.8V
• 1 – Differential pairs push-pull SATA @0.8V or PCI-E @0.8V
• 1 – Differential pairs push-pull DOT96/ SATA@0.8V or 2-Link @3.3V
• 7 – PCI @3.3V
• 2 – 48MHz @3.3V
• 3 – REF @3.3V, 14.318MHz

Others Features:
• Programmable frequency with CPU/PCIE/AGP/PCI
• CPU working range support from 100MHz to 400MHz
• Independent clock group Spread spectrum for EMI control
• Power Management function support
• Watchdog programmable time base reset output
• 4-steps programmable drive strength
• 16-steps programmable skew adjustment with 75p resolution
• 4-stages dynamic frequency switch with innovative AFM over-clock profile
• PCIE clock phase jitter < 86ps.  […]

RTM876-660 pdf


There are different types of frequency generators available, including analog generators and digital generators. Analog frequency generators typically use oscillators or voltage-controlled oscillators (VCOs) to generate signals, while digital generators use direct digital synthesis (DDS) techniques to generate precise and stable frequencies.

RTM876-660 PDF Datasheet


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CXA1644P Datasheet PDF – Echo Effect Generator

Part Number: CXA1644P

Function: Echo Effect Generator

Package: DIP 16 Pin



CXA1644P datasheet



The IC is an echo effect generator IC designed for use in a karaoke set.


1. All the functions required for producing echo effects into a single chip.
2. Delay time 100ms (typ.)
3. Few external parts
4. Combined with a 2-channel surround IC(CXA1673), produces full-fledged surround effects.
5. Variable effect volume


CXA1644P pinout

Absolute maximum ratings ( Ta=25°C )

1. Supply Voltage : Vcc = 7 V

2. Operating Temperature: Tj = -20 ~ +75°C

3. Storage Temperature: Tsg = -65 ~ +150°C

4. Allowable power dissipation : Pd = 900 mW



1. Karaoke set, TV (surround), etc.


Other data sheets are available within the file: CXA1644

CXA1644P Datasheet PDF Download

CXA1644P pdf

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