Philips Semiconductors
UHF/VHF remote control receiver
PIN SYMBOL
12 LFB
13 LIN
EQUIVALENT CIRCUIT
VP
50
kΩ
12
13
14 MXIN
15
VEM
MHB687
14
Product specification
UAA3201T
16 FA
15
MHB688
VP
1.4 kΩ
16
MHB689
TEST INFORMATION
Tuning procedure for AC tests
1. Turn on the signal generator: fi(RF) = 433.92 MHz, no modulation and RF input level = 1 mV.
2. Tune capacitor C6 (RF stage input) to obtain a maximum voltage on pin LIN.
3. Check that data is appearing on pin DATA and proceed with the AC tests.
AC test conditions
The reference signal level Pref for the following tests is defined as the minimum input level in dBm to give a
BER ≤ 3 × 10−2 (e.g. 7.5 bit errors per second for 250 bits/s).
2000 Apr 18
8