The MD-015 is a Microchip GNSS disciplined atomic clock module. 1 PPS TTL, 10MHz sine wave, and 10 MHz square wave outputs are generated from an on-board low-power SA.65s Chip Scale Atomic Clock, a high-stability SA53, or a high-stability SA55 Miniature Atomic Clock which is disciplined to an embedded 72 channel multi-constellation GNSS receiver (with L1 L2 L5 upgrade options for dual-band multi-GNSS receiver supporting GPS, GLONASS, Galileo, and BeiDou) or an external reference input supporting input frequencies from 1Hz (1PPS) to 120 MHz.

MD-015-0001-L1 (w/embedded SA.65s CSAC)
Upgrade Options for Dual-Band L1/L2 or L1/L5 Multi-GNSS Receiver
Temp Range: -40°C to 80°C
Holdover: 1.5 µs for 24 hrs w/2°C temp change
Steady State Power: 2 Watts @ 25°C
Phase Noise: -70 dBc/Hz at 10 Hz & -128 dBc/Hz at 1 kHz
ADEV: 3.0 E-10 at 1 sec tau & 1.5 E-11 at 1000 sec tau

MD-015-0002-L1 (w/embedded SA53 MAC)
Upgrade Options for Dual-Band L1/L2 or L1/L5 Multi-GNSS Receiver
Temp Range: -40°C to 75°C
Holdover: 310 ns for 24 hrs w/2°C temp change
Steady State Power: 9 Watts @ 25°C
Phase Noise: -85 dBc/Hz at 10 Hz & -130 dBc/Hz at 1 kHz
ADEV: 2.0 E-11 at 1 sec tau & 8.0 E-13 at 1000 sec tau

MD-015-0003-L1 (w/embedded SA55 MAC)
Upgrade Options for Dual-Band L1/L2 or L1/L5 Multi-GNSS Receiver
Temp Range: -40°C to 75°C
Holdover: 200 ns for 24 hrs w/2°C temp change
Steady State Power: 9 Watts @ 25°C
Phase Noise: -87 dBc/Hz at 10 Hz & -130 dBc/Hz at 1 kHz
ADEV: 3.0 E-11 at 1 sec tau & 2.0 E-12 at 1000 sec tau

Datasheet