LM4937RL/NOPB National Semiconductor, LM4937RL/NOPB Datasheet - Page 15
![IC AUDIO SUBSYSTM 1.25W 36USMDXT](/photos/7/0/70002/pkg_rla_sml.jpg)
LM4937RL/NOPB
Manufacturer Part Number
LM4937RL/NOPB
Description
IC AUDIO SUBSYSTM 1.25W 36USMDXT
Manufacturer
National Semiconductor
Series
Boomer®r
Type
Class ABr
Datasheet
1.LM4937TLNOPB.pdf
(42 pages)
Specifications of LM4937RL/NOPB
Output Type
1-Channel (Mono) with Mono and Stereo Headphones
Max Output Power X Channels @ Load
1.25W x 1 @ 8 Ohm; 80mW x 2 @ 32 Ohm
Voltage - Supply
2.7 V ~ 5.5 V
Features
Depop, Differential Inputs, I²C, I²S, Mute, Shutdown, SPI, Volume Control
Mounting Type
Surface Mount
Package / Case
36-MicroSMDxt
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
LM4937RLTR
System Controls
HP_L_VOL_4,
HP_R_VOL_4
EP_VOL_4,
LS_VOL_4,
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
HP_L_VOL_3,
HP_R_VOL_3
EP_VOL_3,
LS_VOL_3,
TABLE 7. Loudspeaker, Earpiece, HP Left or Right Volume Control
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
HP_L_VOL_2,
HP_R_VOL_2
EP_VOL_2,
LS_VOL_2,
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
15
HP_L_VOL_1,
HP_R_VOL_1
EP_VOL_1,
LS_VOL_1,
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
HP_L_VOL_0,
HP_R_VOL_0
EP_VOL_0,
LS_VOL_0,
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
<–90 (MUTE)
Gain (dB)
–56
–52
–48
–45
–42
–39
–36
–33
–30
–28
–26
–24
–22
–20
–18
–16
–14
–12
–10
www.national.com
+1
+2
+3
+4
+5
–8
–6
–4
–3
–2
–1
0