Nokia NSE–3 SERIES Service Manual page 19

PAMS
Technical Documentation
Pin Name Min
8 XMIC 2.0
1.47
2.5
100
HMIC 0
9 SGND
10 XEAR
16
4.7
16
HEAR
11 MBUS 0
2.0
12 FBUS_RX 0
2.0
13 FBUS_TX 0
2.0
14 GND 0
Original 11/97
Typ Max Unit
2.2 kΩ
1 Vpp
1.55
2.85
µA
600
58 490 mV
3.2 29.3 mV
47
µF
10
380
47
µF
10
300
10 kΩ
1.0 Vpp
22 626 mV
10 kΩ
1500
2.8
28 626 mV
logic low 0.8
logic high 2.85
logic low 0.8
logic high 2.85
logic low 0.5
logic high 2.85
0.3
Notes
Input AC impedance
Maximum signal level
V Mute (output DC level)
V Unmute (output DC level)
Bias current
Maximum signal level
Microphone signal
Connected to COBBA MIC3P input
Ω
Output AC impedance (ref. GND)
Series output capacitance
Ω
Resistance to phone ground
Ω
Output AC impedance (ref. GND)
Series output capacitance
Ω
Load AC impedance to SGND (Head-
set)
Load AC impedance to SGND (Acces-
sory)
Maximum output level (no load)
Output signal level
Load DC resistance to SGND (Acces-
sory)
Ω
Load DC resistance to SGND (Head-
set)
V DC voltage (47k pull–up to VBB)
Earphone signal (HF– HFCM)
Connected to COBBA HF output
V Serial bidirectional control bus.
Baud rate 9600 Bit/s
Phone has a 4k7 pullup resistor
V Fbus receive. Serial Data
Baud rate 9.6k–230.4kBit/s
Phone has a 220k pulldown resistor
V Fbus transmit. Serial Data
Baud rate 9.6k–230.4kBit/s
Phone has a 47k pullup resistor
V Supply ground
NSE–3
System Module
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