Specifications

DTT 7685x
SBU Technology – Tuners ATSC half NIM with Ch 3 / 4 modulator
20 Apr 2007
Preliminary Specification Page 7 / 29
4. Pin Definitions
Pins No Pins Name Pins Description :
1 -- --
2 Vcc1 Supply for Tuner +5V
3 Path Sel *Select modulator carrier On /Off
(Optional)
4 Ch3/4 Select RF frequency CH3 / CH4
5 RF AGC External RF AGC input
6 Audio in Base band sound input
7
Video in Base band video input
8 Vcc2 Modulator supply +5V
9 -- --
10 -- --
11 -- --
12 GND Ground
13 -- --
14 SCL I²C clock
15 SDA I²C data
16 As Tuner address select
17 IF out IF output
18 IF AGC IF amplifier AGC control 0…3.3 V
19 GND Ground
20 D-IF out Digital IF output balanced
21 D-IF out Digital IF output balanced
Note: 1. both “—“no connection & “int” in the application should leave it open
*2. Path sel (Mode On/Off select) is also controlled by I
2
C. Please refer to 3
rd
table on page 13 for details.