User Guide

NSB-5
System Module PAMS Technical Documentation
Page 10 Nokia Mobile Phones Ltd. Issue 1 03/01
Table 3: System/IBI connector
Pin
IB-
pin
NAME Function Min Typ Max Unit Description
10 Yes XEAR Analog
audio out-
put (from
phone to
accessory)
16
4.7
47
10
10
1.0
100
300
Ω
uF
Ω
kΩ
V
p-p
kΩ
Output AC impedance (ref GND)
resistor tol. is 5%
Series output capacitance
Load AC impedance to GND: Head-
set
Load AC impedance to SGND:
External accessory
Max. output level. No load
Resistance to accessory ground (in
accessory)
Accessory
detection
(from
accessory
to phone)
0
16
0.5
6.8
2.8
47
0.2
1500
V
kΩ
V
Ω
V
kΩ
DC voltage (ref. SNGD). External
accessory
Load DC resistance to SGND. Exter-
nal accessory
DC voltage (ref SGND). Headset
with closed switch
Load DC resistance to SNGD. Head-
set with closed switch
DC voltage (ref SGND). No acces-
sory or headset with open switch
Pull-up resistor to VBB in phone