!
303DL F
EATURES
Complete DAA includes:
鈥?3.3 V to 5 V digital/analog power supplies
鈥?JATE filter option
鈥?86 dB dynamic range TX/RX paths
鈥?Daisy-chaining for up to eight devices
鈥?Integrated ring detector
鈥?2000 V isolation
鈥?Support for Caller ID
鈥?Low-profile SOIC packages
鈥?Direct interface to DSPs
鈥?Integrated modem CODEC
鈥?Compliant with FCC Part 68
鈥?Low-power standby mode
鈥?Proprietary ISOcap鈩?technology
鈥?Optional IIR digital filter
PRELIMINARY
PCT1789N DATA SHEET
303DL F
UNCTIONAL
D
ESCRIPTION
The 303DL chip set is an integrated direct digital access
arrangement (DAA) chip set that provides a digital, low-
cost, solid-state interface to a telephone line. Available in
two 16-pin small outline packages, it eliminates the need
for an analog front end (AFE), an isolation transformer,
relays, opto-isolators, and a 2- to 4-wire hybrid. The
303DL dramatically reduces the number of discrete
components and cost required to achieve compliance
with FCC Part 68. The 303DL interfaces directly to
standard modem DSPs and supports all U.S. FCC and
JATE out-of-band noise requirements.
303DL A
PPLICATIONS
鈥?Modems
鈥?Phone line interface systems
303DL Chip Set
303DL F
UNCTIONAL
B
LOCK
D
IAGRAM
MCLK
SCLK
FSYNC
SDI
SDO
FC/RGDT
Out
Digital
Interface
Hybrid
In
TX
RX
RX
Isolation
Interface
Isolation
Interface
DC
Termination
DCT
REXT
IGND
RNG1
RNG2
QB
QE
RGDT/FSD
OFHK
MODE
RESET
AOUT
Control
Interface
Ring Detect
Off-hook
PCT303D
PCT303L
PRELIMINARY
PC-TEL, Inc.
2
1789N0DOCDAT01A-0399