MSM7578HRS

The MSM7578HRS belongs to MSM7578 and MSM7579 family which are single-channel CODEC CMOS ICs for voice signals ranging from 300 to 3400 Hz and these devices contain filters for A/D and D/A conversion. The devices use the same transmission clocks as those used in the MSM7508B and MSM7509B. The analog output signal can directly drive a piezoelectric type handset receiver. Designed especially for a single-power supply and low-power applications, these devices are particularly optimized for telephone terminals in digital wireless systems and ISDN systems.

The features of MSM7578HRS can be summarized as (1)single power supply: +5.0 V ±5%; (2)low power consumption operating mode: 25 mW Typ. 47 mW Max. VDD = 5V, power down mode: 0.05 mW Typ. 0.3 mW Max. VDD = 5V; (3)ITU-T companding law: MSM7578H: -law, MSM7579: A-law, MSM7578V: /A-law pin-selectable; (4)built-in PLL eliminates a master clock; (5)serial data rate: 64/128/256/512/1024/2048 kHz, 96/192/384/768/1536/1544/200 kHz; (6)adjustable transmit gain; (7)built-in reference voltage supply; (8)directly drive a line transformer of 600; (9)the 16-pin DIP and 24-pin SOP package products provide pin compatibility with the MSM7508B/7509B; (10)the 20-pin SSOP package products have 1/3 the foot print of conventional products.

The absolute maximum ratings of MSM7578HRS are (1)power supply voltage VDD: 0 to 7V; (2)analog input voltage VAIN: -0.3 to VDD + 0.3V; (3)digital input voltage VDIN: -0.3 to VDD + 0.3V; (4)storage temperature TSTG: -55 to +150°C.