RP-SM304A

The Parastream RP-SM304A is a replacement part for the Siemens SM304A integrated circuit used in the Korg BX-3 and CX-3 combo organs, circa 1980. The Siemens SM304A is a keyboard encoder that converts 32 parallel keyboard inputs into a serial stream. These original Siemens parts are very difficult to find.

The RP-SM304A is a small printed circuit board that plugs directly into the 40-pin socket of the BX-3/CX-3 KLM-244 board. It utilizes surface-mount CMOS technology to realize its small size and low power consumption.

The Korg CX-3 uses two SM304A parts on one KLM-244 board. The BX-3 uses four SM304A parts on two KLM-244 boards. An adapter socket (23-00040615) is included with each RP-SM304A to facilitate mounting of the RP-SM304A in some circuit boards.

You may view or download the RP-SM304A datasheet and the RP-SM304A installation instructions. There is also a FAQ page for Frequently Asked Questions.

Key Benefits

1. Functional replacement for the original Siemens SM304A part in most applications.
2. Plugs directly into the IC socket on the PC board.
3. SM304As may be replaced one at a time — Some other solutions require both to be replaced at the same time.

Support

Visit the Parastream Support Forums for free community-based technical support. The forums are moderated and your questions will be answered by knowledgeable forum members or a member of the Parastream Technical Support staff.

RoHS Compliance

The Parastream RP-SM304A is categorized as "Spare parts for equipment in service," and is exempt from the RoHS (Lead-free) directive. The Parastream™ RP-SM304A is manufactured using non-RoHS compliant components and solder.

Pricing and Ordering

These parts are currently shipping. Current stock levels are indicated in the In Stock column. If an item cannot be backordered, as indicated in the Can Backorder column, do not place an order for a higher quantity than is indicated in stock. To order, click on the button. If you have problems getting the order form to display after clicking the button, try disabling your popup blocker. The SKU number below is for unit pricing. Quantity discounts are available for resellers and high volume repair shops. Contact us for details.

RP-SM304A is a trademark and Parastream is a registered trademark of Parastream Technologies, Inc.  Korg is a registered trademark of Korg, Inc.