Decoder BCD to 16 (Yaesu band decoder) not only for antenna switch

This is simply but powerful decoder from BCD data input to 16 outputs, compatible with Yaesu BCD (Yaesu BCD decoder). You can use it everywhere you have less wires than you need and also with BCD (TTL) output devices (like Microham). You need only 4 wires and control up to 16 outputs. There is universal output driver. You can drive outputs by switching to GND or + Vcc (EXT) voltage. BCD inputs include RF and high voltage protection. Optional PTT input works as Hot Switch protection.

Main functions:

• BCD to 16 matrix table
• YAESU BCD to 16 outputs
• YAESU BCD BAND DECODER
• Outputs 0 to 15
• LED indications
• Universal OUTPUT: + or gnd
• BCD input HIGH with 2,6 to 15V - UNIVERSAL: TTL and up to 15V
• PTT hot switch protection
• RF and high voltage protections
• Both drivers (ULN and TBD) are included
• PCB size = 140 x 63
• Available as
• Assembled: ready to use

Parameters:

• Output current max. 500mA
• EXTernal voltage for relays with different voltage than 12V by jumper (max. 40V DC)
• Voltage drop for TBD driver typ. 0,2V for +12V input and 0,6V for BCD wires power input
• Voltage drop for ULN driver typ. 0,8V for +12V input and 1,3V for BCD wires power input
• Supply voltage 12 to 14 V DC
• Control voltage for BCD input is TTL compatible and up to 15V (min 2,6V for active HIGH)
• Low loss in switching drivers
• Universal output switching: to GND or + Vcc (driver IO + jumper)
• PTT hot switch protection isolated PTT to GND lock outputs
• Compatible with Microham ACC and YAESU
• Compatible with OM-power amplifier Manual page 51 (ANT/BPF DB15)
• Devices with the open collector needs external pull up resistors picture
• RF-KIT.de PA with the open collector (like B26-PA RF2K-S) connection + enable BAND data output in PA picture
• RF and high voltage input protections

Use:

• Universal decoder BCD to 16
• Compatible with YAESU BCD output
• Antenna band decoder
• When you miss wires to your tower :)
• Remote Control expander

Matrix table for inputs and outputs:

Connection of control cables and power supply:

• Power supply input
• BCD input voltage 2,6 to 15 V DC

PTT hot switch protection:

• You can use this PTT input as Hot Switch protection
• Active when LOW

Output voltage:

• Output voltage for TBD driver
• +12 means supply voltage of BCD board
• EXT is external voltage - for relays with different voltage than 12 V (could be 5 or 24 V DC)

Output driver:

• Universal outputs - switching to GND or + voltage
• Easy to set by Jumper
• Easy to replace driver ULN (- out) / TBD (+ out)

Open collector device:

Devices with the open collector (like B26-PA RF2K-S) needs external pull up resistors picture

Example with 6-to-1:

• Need four (five) wires between controller and BCD-to-16 converter
• GND, (+12V) and three control wires
• Output must be with TBD drivers (+ out)

Example with PA BCD output:

• Compatible with OM-power amplifier Manual page 51 (ANT/BPF DB15)
• Need four (three) wires between controller and BCD-to-16 converter
• GND, (+12V) and three control wires
• Output must be with TBD drivers (+ out)

Example with Microham devices:

• Need four (three) wires between controller and BCD-to-16 converter
• GND, (+12V) and three control wires
• Output must be with TBD driver (+ out)

Do you need TTL version - compatible with Microham and another devices? Continue there:

Do you need BCD to DEC higher voltage version - compatible with +12V? Continue there:

Download

BCD to 16 decoder board
Schematic and board pictures	sch	brd
		71
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