Global Mixed-mode Technology Inc.
G1421
Application Circuits (Continued)
No DC Blocking Capacitors Application
GND/HS
1
GND/HS
VOL
24
23
TJ
2
LOUT+
3
ROUT+
22
21
CIR
RIR
CIL
RIL
RLINEIN
LLINEIN
RFL
20KΩ
RFR
20KΩ
CFR
AUDIO SOURCE
CFL
4
RC
4.7Ω
10KΩ
1µF
10KΩ
1µF
AUDIO SOURCE
LHPIN
5
6
RHPIN
LVDD
20
7
CC
0.1µF
LBYPASS
RVDD
HP-IN
G1421
RBYPASS
CBL
4.7µF
4.7µF
19
8
18
17
SHUTDWON
4.7µF
MUTE OUT
LOUT-
HP/LINE
ROUT-
9
16
15
1
2
10
3
4
MUTE IN
GND/HS
SE/BTL
11
12
14
13
RC
4.7Ω
5
GND/HS
PHONOJACK
CC
0.1µF
Logical Truth Table
INPUTS
OUTPUT
AMPLIFIER STATES
Input L/R Out+ L Out- R Out- Mode
HP-IN Mute In Shutdown Mute Out
SE/BTL HP/LINE
X
Low
High
X
X
X
X
X
X
X
----
High
----
----
X
X
X
X
----
VDD/2
VDD/2
VDD/2
BTL
----
----
VDD/2
----
Mute
Mute
Mute
Mute
High
High
High
High
High
High
VDD/2
----
X
----
High
----
VDD/2
BTL
----
BTL
Low
Low
High
High
X
Low
High
Low
High
Low
High
Low
Low
Low
Low
High
High
Low
Low
Low
Low
Low
Low
Low
Low
Low
Low
Low
Low
Low
Low
Low
Low
Low
Low
L/R Line
L/R HP
L/R Line
L/R HP
L/R Line
L/R HP
BTL
BTL
Output
BTL
Output
BTL
Output
BTL
Output
SE
Output
Output
----
----
----
----
----
----
SE
Output
SE
SE
Output
SE
VDD/2
VDD/2
HP-IN
HP-IN
Output
SE
X
Output
TEL: 886-3-5788833
http://www.gmt.com.tw
Ver: 1.6
Aug 04, 2005
20
GMT [ GLOBAL MIXED-MODE TECHNOLOGY INC ]
