Description
The TEWS Technologies TPMC917-10R is a standard single-width, 32-bit PCI Mezzanine Card (PMC) featuring 4 MB of non-volatile battery-backed SRAM (NV-SRAM) and four independent, ESD-protected RS-232 asynchronous serial communication channels. It is typically integrated into VMEbus, CompactPCI, or custom carrier board architectures within industrial, aerospace, and defense automation systems requiring reliable non-volatile data logging alongside legacy serial connectivity.
Procurement & Availability
- Condition: Factory Surplus / Refurbished Tested (Discontinued by OEM)
- Availability: Limited legacy stock; subject to prior sale
- Standard Lead Time: 2 to 4 business days for available stock
- Warranty: 12 months comprehensive replacement warranty
- Commercial Note: Listed price is indicative, not final. Price subject to market conditions; contact us for a firm quote.
Technical Specifications
| Parameter | Value |
| Manufacturer | TEWS Technologies GmbH |
| Product Type | 32-bit PMC Mezzanine Module |
| Form Factor | Single-width PMC (IEEE 1386.1) |
| NV-SRAM Memory Size | 4 MB total (organized in two banks of 512K x 32-bit) |
| Battery Backup | On-board lithium cell or optional external battery via P14 connector (selectable via DIP switch) |
| Battery Monitoring | Automatic 24-hour voltage check with low-voltage interrupt capability |
| Serial Channels | 4 channels, RS-232 asynchronous |
| UART Features | Programmable baud rates up to 115.2 Kbaud; 64-byte transmit and 64-byte receive FIFOs per channel |
| Serial Signal Support | Rx, Tx, RTS, CTS, and GND per channel |
| ESD Protection | Up to +/-15 kV IEC 1000-4-2 on RS-232 interface lines |
| I/O Access | Front panel I/O (via DB25 connector) and Rear I/O (via P14 connector) |
| Operating Temperature | Standard commercial range (verify specific batch datasheets for extended ranges) |
| Certifications / Standards | CE, IEEE 1386.1 |
Engineering & Integration Notes
- Lifecycle Status: Officially discontinued by TEWS Technologies with a Last-Time-Buy date of June 30, 2020. Maintenance teams supporting legacy VME/cPCI carrier systems rely on verified surplus or specialized component repair pathways.
- Battery Maintenance: The on-board lithium backup cell preserves SRAM data during system power-down. Verify battery voltage thresholds during scheduled maintenance intervals. If units have been stored long-term without power, check the cell voltage or switch to an external P14 backup source before commissioning.
- Driver Support: Operating system software support packages historically included drivers for VxWorks, Linux, and Windows environments. Verify your specific OS kernel version compatibility before deployment in legacy host slots.
Frequently Asked Questions
- Q: Can the TPMC917-10R maintain data safely if the host rack loses 5 V backplane power?
A: Yes. The onboard voltage monitor continuously tracks the 5 V rail. If it drops below threshold, the module automatically switches data retention over to the lithium backup battery within 1.5 µs, locking out active SRAM access to prevent corruption.
- Q: What is the physical distinction between variant models like the TPMC917-10R and TPMC917-20R?
A: The
-10Rconfiguration includes both the 4 MB NV-SRAM subsystem and the 4-channel RS-232 serial interface, whereas variants like the-20Rprovide the NV-SRAM memory without the serial UART controller block.
