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LMT1-144-5 Datasheet(PDF) 5 Page - Radiometrix Ltd |
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LMT1-144-5 Datasheet(HTML) 5 Page - Radiometrix Ltd |
5 / 10 page Radiometrix Ltd LMT1/LMR1 Data Sheet page 5 Figure 5: LMR1 footprint (top view) Pin description – LMR1 Pin Name Function 1a Vcc 3.1 – 15V power supply 2a 0V Ground 3a RXE Receiver Enable (active high) 4a RXD Data out (open collector, no pull-up) 5a AF out 700mV p-p audio. DC coupled, approx 0.8v bias. 1b P0/PGM Parallel Channel select LSB Serial frequency programming / configuration 1 2b P1 Parallel Channel select 3b P2 Parallel Channel select 4b P3 Parallel Channel select MSB 5b RSSI DC level between 0.5v and 2.2v. 60dB dynamic range NOTES: 1. Serial programming is by an inverted, cmos logic level, 2400 baud UART data stream applied to the P0 pin. 2. Channel select inputs have pull-ups (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. |
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Similar Description - LMT1-144-5 |
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