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MSM7541 Datasheet

  • MSM7541

  • Single Rail CODEC

  • 154.75KB

  • OKI

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E2U0014-28-81
隆 Semiconductor
MSM7541/7542
隆 Semiconductor
Single Rail CODEC
This version: Aug. 1998
MSM7541/7542
Previous version: Nov. 1996
GENERAL DESCRIPTION
The MSM7541 and MSM7542 are single-channel CODEC CMOS ICs for voice signals ranging
from 300 to 3400 Hz. These devices contain filters for A/D and D/A conversion.
Designed especially for a single-power supply and low-power applications, these devices are
optimized for telephone terminals in digital wireless systems.
The MSM7541 and MSM7542 use newly designed operational amplifiers to maintain small
current deviations caused by power voltage fluctuations.
The devices use the same transmission clocks as those used in the MSM7508B and MSM7509B.
The analog output signal, which is of a differential type, directly drives a piezoelectric type
handset receiver.
FEATURES
鈥?Single power supply: +3.0 V to +3.8 V
鈥?Low power consumption
Operating mode:
23 mW Typ.
V
DD
= 3.3 V
Power save mode:
1 mW Typ.
V
DD
= 3.3 V
Power down mode:
0.04 mW Typ.
V
DD
= 3.3 V
鈥?ITU-T Companding law
MSM7541:
m-law
MSM7542:
A-law
鈥?Built-in PLL eliminates a master clock
鈥?Serial data rate: 64/128/256/512/1024/2048 kHz
96/192/384/768/1536/1544/200 kHz
鈥?Adjustable transmit gain
鈥?Adjustable receive gain
鈥?Built-in reference voltage supply
鈥?Built-in analog loop back test mode
鈥?Differential type analog output. Directly drives a piezoelectric type receiver equivalent to 1.2
kW + 55 nF
鈥?Package options:
20-pin plastic skinny DIP (DIP20-P-300-2.54-S1) (Product name : MSM7541RS)
(Product name : MSM7542RS)
24-pin plastic SOP (SOP24-P-430-1.27-K)
(Product name : MSM7541GS-K)
(Product name : MSM7542GS-K)
26-pin plastic TSOP (TSOPII26/20-P-300-1.27-K) (Product name : MSM7541TS-K)
(Product name : MSM7542TS-K)
1/20

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