EM78808
8-bit Micro-controller
‧ FSK demodulator for Bell 202 and ITU-T V.23 (formerly as CCITT V.23)
‧ Differential Energy Detector (DED) for line energy detection
ꢁCALL WAITING
‧ Operation Voltage 2.6V∼ 5.5V
‧ Compatible with Bellcore special report SR-TSV-002476
‧ Call-Waiting (2130Hz plus 2750Hz) Alert Signal Detector
‧ Good talkdown and talkoff performance
‧ Sensitivity compensated by adjusting input OP gain
ꢁLCD (8x80, 9x80, 16x80, 24x72)
‧ Maximum common driver pins : 16/24
‧ Maximum segment driver pins : 80(SEG0..SEG79)/72(SEG8..SEG79)
‧ Shared COM16 ~ COM23 pins with SEG0 ~ SEG7 pins
‧ 1/4 bias for 8, 9 and 16 common mode and 1/5 bias for 24 common mode
‧ 1/8, 1/9, 1/16, 1/24 duty
‧ 16 Level LCD contrast control (software)
‧ Internal resistor circuit for LCD bias
‧ Internal voltage follower for better display
ꢁPackage type
‧ 136 pin Chip : EM78808BH
‧ 128 pin QFP : (EM78808AAQ , POVD disable) (EM78808ABQ , POVD enable)
‧ 128 pin QFP : (EM78808BAQ , POVD disable) (EM78808BBQ , POVD enable)
III.Application
1. adjunct units
2. answering machines
3. feature phones
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* This specification is subject to change without notice.
8/1/2004 (V3.1)
5
ELAN [ ELAN MICROELECTRONICS CORP ]
