The A300 is a logic-level shifter and voltage converter. It provides two level-shifting channels: the first converting 5 V to 3.3 V, and the second converting 3.3 V to 5 V. Additionally, the A300 provides a regulated 3.3 V power output.
The A300 is commonly used when connecting the pulse-per-second (PPS) output of a GPS16X-HVS to a CR800-series, CR1000, or CR3000 datalogger. In 2014, Garmin changed the PPS output of the GPS16X-HVS from 5 V to 3 V. Units with a serial number 1A4189318 or greater have a PPS output of 0 to 3 V. For those units, an A300 is needed to connect the PPS output to a CR800-series, CR1000, or CR3000 datalogger. Those dataloggers require the PPS line to have a voltage of 3.8 V or greater.
|-NOTE-||For a cable and terminal description, refer to the Installation section of the A300 manual.|
|Cable||30.48 cm (12 in.), 4 conductor, 22 AWG, Santoprene|
|Terminals||4 screw terminals, 12 to 24 AWG, 0.2 in. pitch|
|Mounting||2 mounting holes (1 in. on center), 1.9 mm (0.075 in.) diameter|
|Packaging||Wide temperature polyamide over-mold|
|Temperature||-40° to +70°C|
|Supply Voltage||9 to 16 Vdc (for 12 Vdc nominal systems)|
|Supply Current||100 μA (quiescent)|
|Power Output||3.3 Vdc, ±3%, up to 20 mA guaranteed|
|5 V Signal Input||0 to 6 Vdc, logic low ≤ 1.4 V, logic high ≥ 3.4 V|
|5 V Signal Output||5 Vdc, ±3%, 600 ohm output impedance|
|3 V Signal Input||0 to 6 Vdc, logic low ≤ 0.8 V, logic high ≥ 2 V|
|3 V Signal Output||3 Vdc ±3%, 600 ohm output impedance|
|Maximum Voltage Translation Rate||210 Mbps|
|Dimensions||78 x 46 x 9.3 mm (3.08 x 1.8 x 0.36 in.)|
The A300 is used when connecting the pulse-per-second (PPS) output of a GPS16X-HVS or GPS16X-HVS-PW to a CR800-series, CR1000, or CR3000 datalogger. It is not needed with a CR6 or CR300 datalogger.