Twinleaf TTL Serial Communication Module (COMM-TTL)
COMM-TTL is a compact communication module that connects one Twinleaf sensor to a microcontroller or embedded host using 3.3V logic-level serial. It has a high precision oscillator that is distributed to the connected sensor, and the oscillator can be disciplined to an external timebase using a pulse-per-second signal input.
This item is intended only for use by system integrators and applications where minimum system size and weight are critical. Permanent damage to sensors can occur if the cables are connected or disconnected while powered.
Features
- 3.3V TTL serial interface to the host
- One sensor port via the native TTS link
- ±200 ppb master oscillator stability over temperature range
- Discipline master oscillator with PPS input (from GPS)
- MEMS gyroscope and accelerometer
- Barometric pressure sensor
- Temperature sensor
- Operating temperature: −20 °C – +70 °C
- Volume: 12×57×6 mm³
- Power consumption: 500 mW
- Mass: 100 g
Interface
The host connects to an 8-pin connector:
JST SM08B-SHL
| Pin | Signal |
|---|---|
| 1 | +13–58V |
| 2 | +13–58V |
| 3 | Ground |
| 4 | Ground |
| 5 | Serial input |
| 6 | Serial output |
| 7 | PPS input |
| 8 | Ground |
All digital signals are 3.3V TTL signaling and run directly to a microcontroller without additional protection.
Only one power and ground pair (pins 1 and 3) need be connected; however, note that there is a limit of 0.5 A power per contact.
Two M2 mounting holes are spaced 50 mm apart.
Ordering
COMM-TTL is specified as the communication module of a sensor at the time of order, for example VMR-TTL. Please email for a quote.