AM79C491AXT-C21R

The AM79C491AXT-C21R is designed as one kind of dual subscriber line audio processing circuit device that has the advanced CMOS technology which makes this an economical device that has both the functionality and the low power consumption needed in linecard designs to maximize linecard density at minimum cost.

Features of the AM79C491AXT-C21R are:(1)2.048 MHz or 4.096 MHz master clock; (2)Direct transformer drive; (3)Built-in test modes; (4)Low power CMOS; (5)Mixed mode (analog and digital) impedance scaling; (6)Performance characteristics guaranteed over 12 dB gain range; (7)Adaptive transhybrid balance filter (A suffix only); (8)A-law or -law coding; (9)Dual PCM ports - Up to 8.192 MHz each (128 channels per port).

The absolute maximum ratings of the AM79C491AXT-C21R can be summarized as:(1)Storage temperature: -60°C TA +125°C;(2)Ambient operating temperature: -40°C TA +85°C;(3)Ambient relative humidity: 5% to 100%;(4)Ambient relative humidity: 15% to 85%;(5)Ambient temperature:  0°C TA +70°C;(6)AGND1, AGND2, or AGND: ±50 mV;(7)PGND, DGND1, DGND2, or DGND: 0 V;(8)Source from VCC: 32 mA. If you want to know more information about the AM79C491AXT-C21R, please download the datasheet in www.seekic.com or www.chinaicmart.com .