Motorola MTR2000 Manual page 34

RECEIVER MODULE
MODEL TRD6431C/TRD6411C
U2500 (ABACUS) PINOUT TABLE
Pin
Pin #
Name
1 ODC
2 VDDH
3 DGND
4 VDD
5 VSSR
6 OVCC
7 OGND
8 OB
9 OTBY
10 OT
11 SSL
12 SUB
13 REFI
14 VCC
15 GND
16 DAF2
17 NLS
18 DAF
19 DAFG
20 IFI
21 BYP2
22 BYP1
23 VCCP2
24 IFIN2
25 GNDI
26 IFIN
27 VCCP
28 LOx
29 LO
30 GNDO
31 MOx
32 MO
33 T1C2
34 T1C
35 T1x
36 T1
37 T2C
38 T2x
39 T2
40 CAPx
41 CAP
42 VPP
43 COL
44 EMIT
68P81094E11-D
Schematics (Sheet 10 of 27)
12/26/01
U2500 (ABACUS) PINOUT TABLE (continued)
Signal Pin
Pin Description Pin #
Type Name
Output Output data clock 45 BASE
Power Digital supply 46 IOUT
Power Digital ground 47 LGND
Output Int. reg. digital 3V 48 LVCC
Power Substrate ring 49 DOUTx
Power Oscillator supply 50 DOUT
Power Oscillator ground 51 SBI
Output Oscillator bias 52 FLAG
Input Oscillator tank bypass
Input Oscillator tank
Output Oscillator steering line
Power Substrate
Input Reference input
Power Analog supply
Power Analog ground
Output DAC filter cap 2
Input Nominal DAC level set
Output AC filter cap
Output DAC filter cap
Power IF isolation
Output Mobile IF preamp bypass
Output Mobile IF preamp bypass
Power Mobile IF amp supply
Input Mobile IF input
Power IF input ground
Input Portable IF input
Power Portable IF amp supply
Input LO input bypass
Input LO input
Power IF output ground
Output Mixer output
Output Mixer output
Power 1st tank supply
Power 1st tank supply
Output 1st tank input
Output 1st tank input
Power 2nd tank supply
Output 2nd tank input
Output 2nd tank input
Output DC feedback cap
Output DC feedback cap
Power Supply for charge pump
Input Internal osc device
Output Internal osc device
Signal
Pin Description
Type
Input Internal osc device
Output 2nd LO steering line
Power 2nd LO ground
Power 2nd LO supply
Output Differential output data
Output Differential output data
Input Serial bus input
Power Cavity ground
Abacus Service Notes
Signal
Description/Nominal Signal Levels
Path
Custom Receiver IC provides 2nd conversion amplification and
A
analog to digital conversion of the 2nd IF - Signal resulting in a
differential data output from pins 49 and 50.
Serial Bus Interface (SBI). It is used to program the functions of
B
U2500, to set 2nd LO Frequency and alter internal gain.
Output Data Clock (ODC) is used to clock the output data. For 20
C
and 33 1/3 ksamples/sec the ODC rate is 2.4 MHz and for 60
ksamples/sec the ODC rate is 4.8 MHz. (2.4 MHz and 20k samples/
sec are used).
The ODC is also used to clock the SBI word.