(China (Mainland))
Product Summary
The PEF24911HV2.1 Echocanceller Digital Front End (DFE-Q) is the digital part of an optimized two-chip solution featuring 4x ISDN basic rate access and IDSL access at 144kbit/s. The EF24911HV2.1 is designed to provide in conjunction with the Quad ISDN Echocanceller Analog Front End (PEF 24902 V2.1) full duplex data transmission at the U-reference point according to ANSI T1.601 (1998), ETSI TS 102 080 (1998) and ITU-T G.961 standards.
Parametrics
PEF24911HV2.1 maximum ratings: (1)Ambient temperature under bias: – 40 to 85 ℃; (2)Storage temperature: – 65 to 125 ℃; (3)Supply voltage: – 0.3 to 4.6 V; (4)Input voltage on Input pins and on high ohmic Output pin with respect to ground: – 0.3 to 5.5 V; (5)Maximum current supplied to any pin for more than 5 msec: ±10 mA; (6)ESD robustness HBM: 1.5 kΩ, 100 pF.
Features
PEF24911HV2.1 features: (1)2B1Q-block code (2 binary, 1 quaternary) at 80-kHz symbol rate; (2)LT mode; (3)Data rate of the system interface programmable ; (4)Activation/ deactivation controller; (5)15 s start-up guard timer (T1) can be disabled for use in repeater applications; (6)Adaptive echo cancellation and equalization; (7)Automatic gain control and polarity adaptation; (8)Clock recovery (frame and bit synchronization) in all applications; (9)Built-in wake-up unit for activation from power-down state.
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