Radiometrix Ltd

TLC2/RLC2 Data Sheet

page 5

Pin description – RLC2

Pin

Name

Function

1

Vcc

DC supply (3.7V to 15V, at 18mA).

2

RSSI

0.5V-2.5V DC level. 60dB dynamic range. 40k

Ω output impedance

3

0V

Ground

4

RXD

Open collector digital data output with internal 47k

Ω pull-up to Vcc

5

AF

P0/PGM Parallel channel

select, bit 0

True logic (0V = low). Weak pullup to 3.5V

P1

Parallel channel

select, bit 1

True logic (0V = low). Weak pullup to 3.5V

P2

Parallel channel

select, bit 2

True logic (0V = low). Weak pullup to 3.5V

P3

Parallel channel

select, bit 3

True logic (0V = low). Weak pullup to 3.5V

Jumper

P4

Parallel channel

select, bit 4

Jumper soldered, P4=0 (Channel 00 – Channel 15 at 50kHz step)

Jumper clear, P4=1 (Channel 16 – Channel 31 at 50kHz step)

NOTES:

1. Serial programming is by a 2400 baud inverted 'RS232' (3V CMOS levels) datastream applied

to the P0 pin. If connection to a true RS232 port is desired, then a suitable inverting level

shifter / buffer (MAX232 or NPN switch transistor) is needed.

2. Parallel channel select is by a 4 pin parallel input (MSB selected by jumper). 3V CMOS levels

should be used.

3. As supplied the frequency table is thus:

ch 0-15

433.875 – 434.625 MHz (50KHz steps)

ch 16-31 433.9 - 434.65 MHz (50KHz steps)

Figure 5: RLC2 footpint (top view)