PBL 402 15
Pin Descriptions (cont.):
Pin number
8
9
10
V
CC
VCO
Name
Function
Not connected
Not connected
Voltage supply to the VCO
Schematic in/output of the pin
N/C
Clamp to GndVCO
V
CC
VCO
11
VTUNE
Tuning voltage input for the VCO
VTUNE
GndVCO
12
13
GndVCO
GndFM
Ground connection to the VCO
Ground connection to the FM discriminator section.
A diode to GndCP and GndFM
V
CC
FM
14
DTX
Tx data input for either analog or logic signal.
DTX
GndFM
V
CC
FM
15
MOD
Apply modulation. The PLL is set into open loop
condition and modulation is applied to the VCO.
MOD
Bias
GndFM
V
CC
FM
16
SHOLD
Slice level hold logic input. (In Tx mode this input
may also act as the MOD pin).
SHOLD
Bias
GndFM
V
CC
FM
17
DRX
Rx data output of FM discriminator for either analog
or logic signal.(In standby mode outputs lock detect)
DRX
GndFM
V
CC
FM
18
DSL
Data slice level output.
DSL
GndFM
19
V
CC
FM
Voltage supply to the FM discriminator section.
Clamp to GndFM
V
CC
RSSI
20
RSSI
RSSI output of limiting strip detector chain.
RSSI
GndRSSI
21
V
CC
RSSI
Voltage supply to the RSSI section.
Clamp to GndRSSI
V
CC
RSSI
22
23
CAP+
CAP-
External stabilising capacitors for limiting strip
DC input offset correction loop.
CAP+/CAP-
Both inputs alike
GndRSSI
4
ERICSSON [ ERICSSON ]
