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NEW 2-Inch Digital Instruments
FLEX® Digital GPS Clock
The new MD23-190 multi-function clock features UTC Time, Local Time and multiple Timers. This digital clock displays smooth, high-resolution graphics and receives ARINC 429 input to sync with a GPS source. The MD23-190 maintains accuracy, even if GPS input is unavailable. It can output time to external equipment and provide Estimated Time (ET) to your next waypoint.
Night Vision Imaging System (NVIS) compatible versions are available.

9 Functions
Specifications
- Local Time
- UTC/Zulu Time
- Flight Timer
- Countdown Timer
- Stopwatch
- Date
- Time to Waypoint
- Hobbs
- Run Timer
Features
- Receives ARINC 429 input to sync with a GPS source
- Maintains accuracy, even if GPS input is unavailable
- Outputs time to external equipment and provides Estimated Time (ET) to your next waypoint
- Clock settings include 12- or 24-hour mode and seconds ON or OFF
- Standard 2-inch size
- Lightweight — 0.4 lbs
- Simple user interface — Single, push-and-turn control knob
- Daylight readable LCD and smooth, high-resolution graphics
- Manual external lighting control or built-in photocell for automatic dimming
- Night Vision Imaging System (NVIS) compatible (available)
- Field-upgradeable software via standard USB-A port
- TSO-certified (Design Assurance Level A)
- Designed and built in Wichita, Kansas, USA
- Two-year limited warranty
Power Input
10–32 VDC
0.14A @ 28 VDC; 4 watts nominal
0.14A @ 28 VDC; 4 watts nominal
Data Input
ARINC 429: Low or high speed; Labels 150, 252
Data Output
ARINC 429: Low or high speed; Label 150
Lighting
5, 14, or 28 VDC external control or internal photocell for automatic dimming
Battery
Rechargeable coin cell (memory only)
Weight
0.4 lbs (0.17 kg)
Mounting
Rear panel mounted, (4) #6–32 screws, 2.25-inch round bezel
Dimensions
2.43 x 2.43 x 1.0 inches (61.7 x 61.7 x 25.4 millimeters)
Mating Connector
P/N 9019162-1: 26-pin, D-Sub electrical connector (Quick Disconnect)
Certification
FAA/EASA TSO certified to C113b
RTCA DO-160G qualified
RTCA DO-178C qualified, Design Assurance Level (DAL) A
RTCA DO-160G qualified
RTCA DO-178C qualified, Design Assurance Level (DAL) A
Rights
U.S. Patent 11,048,389