LMT2-458-10 参数 Datasheet PDF下载

Figure 5: LMR2 footpint (top view)

Pin description –

LMR2

Pin

1a

2a

3a

4a

5a

1b

2b

3b

4b

5b

Name

Vcc

0V

RXE

RXD

AF out

P0/PGM

P1

P2

P3

RSSI

Function

3.1 – 15V power supply

Ground

Receiver Enable (active high)

Data out (open collector, no pullup)

700mV p-p audio. DC coupled, approx 0.8v bias.`

Parallel Channel select LSB

Serial frequency programming / configuration

1

Parallel Channel select

Parallel Channel select

Parallel Channel select MSB

DC level between 0.5v and 2.2v. 60dB dynamic range

NOTES:

1. Serial programming is by an inverted, cmos logic level, 2400 baud RS232 datastream applied to

the P0 pin.

2. Channel select inputs have pullups (50kΩ) to 3v internal rail. Do not exceed 3v logic levels on

this port.

3.

Channel select inputs are active low

4.

All pins are on an 0.1" grid

5.

Data recovery circuit used for RXD is not a simple 'average and compare' type. It is a peak

sampling quasi-DC coupled design, allowing a greater than usual flexibility in data format.

6.

Unit will operate (with marginally reduced specifications) from a 3.0v rail. This must be well

regulated and without noise or ripple, as in this state the unit's internal regulator no longer

operates, and provides no supply rejection.

Radiometrix Ltd

LMT2/LMR2 Data Sheet

page 5