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Digital Clock / MAX Power USB Charger


CHRONOS CH93MAX digital clocks combine time keeping and USB charging power in one essential unit. MAX Power USB charging ports can simultaneously charge two devices, delivering up to 60 watts of USB power per port. The multifunctional CH93MAX offers 8 modes and is an ideal replacement for older, single-function clocks. View all USB Charging Ports Buy Now
CH93MAX Digital Clock/USB Charger thumb
CH93MAX Installation Image thumb


  • Delivers up to 60 watts and 3 amps of USB power per port
  • Output Voltage: 5 – 20 VDC per PD port (variable)
  • Input Voltage: 22 – 32 VDC
  • 8 Modes: Local Time, UTC/Zulu Time, Flight Timer, Countdown Timer, Stopwatch, Volts, OAT, Secondary Air Temp
  • Six-digit, seven-segment LED clock
  • Clock settings include 12- or 24-hour mode and seconds On or Off
  • Manual and automatic lighting control with programmable dimming curves
  • Internal, field-replaceable battery maintains Time and Flight Timer memory, without aircraft power
  • Compact, 2-inch size fits standard panel cutout
  • Compatible with Apple, Android and other USB devices
  • Protects itself and the charging device from short circuit, power surges and over-current potential
  • Designed and built in Wichita, Kansas, USA
  • 2-year limited warranty
  • FAA TSO Certified


Model Number CH93MAX
Part Number 6420093-5
Input Voltage 22 – 32 VDC
Input Current 84 W maximum; 3.0 A at 28 VDC
Output Voltage
USB-C PD 5 – 20 VDC per port (variable)
USB-A 5 ± 0.25 VDC per port
Output Power
USB-C PD 60 W / 3 A per port
USB-A 15 W / 3 A per port
Clock Accuracy ± 0.5 seconds in 24 hours, ± 3 minutes per year
Weight 5.0 oz (0.3 lbs)
Dimensions 2.39" W x 2.39" H x 1.22" D
Temperature -40ºC to 70ºC (-40ºF to 158ºF)
Altitude 55,000 feet
Charging Port Type Dual USB-A / USB-C PD
Mating Connector Kit MCIA P/N 9018178-1
Mounting Rear-panel mounted, (4) #6 screws
Case Anodized aluminum black
Certification FAA TSO certified to C71
EASA ETSO certified to C71
RTCA DO-160G qualified


Fliers and Brochures
CH93MAX Product Flier
Electrical Power Systems Brochure
CHRONOS Brochure

Installation Manual
IM 9018205

Technical Drawing
OL 6420093

Service Bulletins
SB MD93-01

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