G1420
Global Mixed-mode Technology Inc.
Pin Description
PIN
1,12,13,24
2
NAME
GND/HS
TJ
I/O
FUNCTION
Ground connection for circuitry, directly connected to thermal pad.
O
Source a current inversely to the junction temperature. This pin should be left uncon-
nected during normal operation. For more information, see the junction temperature
measurement section of this document.
3
4
5
LOUT+
LLINE IN
LHP IN
O
I
Left channel + output in BTL mode, + output in SE mode.
Left channel line input, selected when HP/ pin is held low.
I
Left channel headphone input, selected when HP/pin is held high.
6
7
8
LBYPASS
LVDD
Connect to voltage divider for left channel internal mid-supply bias.
Supply voltage input for left channel and for primary bias circuits.
Shutdown mode control signal input, places entire IC in shutdown mode when held
high, IDD = 5µA.
I
I
SHUTDOWN
9
MUTE OUT
LOUT-
O
O
I
Follows MUTE IN pin, provides buffered output.
10
11
14
15
16
Left channel - output in BTL mode, high impedance state in SE mode.
Mute control signal input, hold low for normal operation, hold high to mute.
Mode control signal input, hold low for BTL mode, hold high for SE mode.
MUTE IN
SE/BTL
ROUT-
I
O
I
Right channel - output in BTL mode, high impedance state in SE mode.
MUX control input, hold high to select headphone inputs (5,20), hold low to select line
inputs (4,21).
HP/LINE
17,23
NC
18
RVDD
I
Supply voltage input for right channel.
19
RBYPASS
RHP IN
RLINE IN
ROUT+
Connect to voltage divider for right channel internal mid-supply bias.
Right channel headphone input, selected when HP/pin is held high.
Right channel line input, selected when HP/pin is held low.
Right channel + output in BTL mode, + output in SE mode.
Recommend connecting the Thermal Pad to the GND for excellent power dissipation.
20
I
I
21
22
O
Thermal Pad
TEL: 886-3-5788833
Ver: 1.5
http://www.gmt.com.tw
Aug 04, 2005
14
GMT [ GLOBAL MIXED-MODE TECHNOLOGY INC ]
