NJM2537
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Ver.2003-12-09
■ TERMINAL FUNCTION
PIN NO. SYMBOL PIN VOLTAGE (V) FUNCTION EQUIVALENT CIRCUIT
10 RSSI 0
RSSI output
11 LPF IN 0.18
Input of a low pass filter. It is
biased from AF-OUT (9pin)
through an external RC filter.
12 LPF OUT 0.18
Output of a low pass filrter.
7 FSK REF 0.18
Reference input of a wave
shaping comparator.
An external capacitor is
connected.
13 BS -
Control of a battery saving
circuit.
Hi : active
Lo : suspended
14 CHARGE -
Control of a quick charge /
discharge circuit.
Hi : Its circuit turns ON
Lo : Its circuit turns OFF
15 FSK OUT -
Output of a wave shaping
circuit. The output signal is
inverted against LPF output
signal.
