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PDF Am79Q031 Data sheet ( Hoja de datos )
| Número de pieza | Am79Q031 | |
| Descripción | Quad Subscriber Line Audio-Processing Circuit Devices | |
| Fabricantes | Legerity | |
| Logotipo |  |
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Am79Q02/021/031
Quad Subscriber Line Audio-Processing Circuit
(QSLAC™) Devices
DISTINCTIVE CHARACTERISTICS
Performs the functions of four codec/filters
Software programmable:
— SLIC input impedance
— Transhybrid balance
— Transmit and receive gains
— Equalization (frequency response)
— Digital I/O pins
— Programmable debouncing on one input
— Time slot assigner
— Programmable clock slot and PCM transmit clock
edge options
Standard microprocessor interface
A-law, µ-law, or linear coding
Single or Dual PCM ports available
— Up to 128 channels (PCLK at 8.192 MHz) per
PCM port
— Optional supervision on the PCM highway
GENERAL DESCRIPTION
The Am79Q02/021/031 Quad Subscriber Line Audio-
Processing Circuit (QSLAC) devices integrate the key
functions of analog linecards into high-performance,
very-programmable, four-channel codec-filter devices.
The QSLAC devices are based on the proven design
of Legerity’s reliable SLAC™ device families. The
advanced architecture of the QSLAC devices
implements four independent channels and employs
digital filters to allow software control of transmission,
thus providing a cost-effective solution for the audio-
processing function of programmable linecards.
1.536, 1.544, 2.048, 3.072, 3.088, 4.096, 6.144,
6.176, or 8.192 MHz master clock derived from
MCLK or PCLK
Built-in test modes with loopback, tone
generation, and µP access to PCM data
Low-power, 5.0 V CMOS technology
5.0 V only operation
Mixed state (analog and digital) impedance
scaling
Performance characteristics guaranteed over a
12 dB gain range
Real Time Data register with interrupt (open
drain or TTL output)
Supports multiplexed SLIC inputs
Broadcast state
256 kHz or 293 kHz chopper clock for Legerity
SLICs with switching regulator
Maximum channel bandwidth for V.34 modems
Advanced submicron CMOS technology makes the
Am79Q02/021/031 QSLAC devices economical, with
both the functionality and the low power consumption
needed in linecard designs to maximize linecard
density at minimum cost. When used with four Legerity
SLICs, a QSLAC device provides a complete software-
configurable solution to the BORSCHT functions.
Publication# 080147 Rev: H Amendment: /0
Issue Date: September 2001
1 page  
ORDERING INFORMATION
Standard Products
Legerity standard products are available in several packages and operating ranges. The order number (Valid
Combination) is formed by a combination of the elements below.
Am79Q02/021/031
JC
TEMPERATURE RANGE
* C = Commercial (0°C to 70°C;
Relative Humidity = 15% to 95%)
PACKAGE TYPE
J = 44-Pin Plastic Leaded Chip Carrier (PL 044)
—Am79Q02/021 Only
32-Pin Plastic Leaded Chip Carrier (PL 032)
—Am79Q031
V = 44-Pin Thin Quad Flat Pack (PQT 044)
—Am79Q021 Only
DEVICE NUMBER/DESCRIPTION
Am79Q02/021/031
Quad Subscriber Line Audio-Processing Circuit (QSLAC) Device
Valid Combinations
Am79Q02
JC
Am79Q021
JC
Am79Q031
JC
Am79Q021
VC
Valid Combinations
Valid Combinations list configurations planned to
be supported in volume for this device. Consult
the local Legerity sales office to confirm availabil-
ity of specific valid combinations, to check on new-
ly released combinations, and to obtain additional
data on Legerity’s standard military–grade prod-
ucts.
Note:
* Functionality of the device from 0°C to +70°C is guaranteed by production testing. Performance from –40°C to +85°C
is guaranteed by characterization and periodic sampling of production units.
SLAC Products
5
5 Page 
ABSOLUTE MAXIMUM RATINGS
Storage Temperature . . . . . . . . –60°C < TA < +125°C
Ambient Operating Temperature –40°C < TA < +85°C
Ambient Relative Humidity . . . . . . . . . . . . 5% to 95%
(non-condensing)
VCCA with respect to AGND . . . . . . . .–0.4 V to +7.0 V
VCCA with respect to VCCD . . . . . . . . . . . . . . ±50 mV
VCCD with respect to DGND. . . . . . . .–0.4 V to +7.0 V
VIN with respect to AGND . . .–0.4 V to (VCCA +0.4 V)
AGND with respect to DGND . . . . . . . . . . . . . . ±0.4 V
Other pins
with respect to DGND . . . . . –0.4 V to VCCD +0.4 V
Total combined CD1–C5 current per device:
Source from VCCD . . . . . . . . . . . . . . . . . . . . . 40 mA
Sink into DGND . . . . . . . . . . . . . . . . . . . . . . . . 40 mA
Latch-up immunity (any pin). . . . . . . . . . . . . ±100 mA
Stresses above those listed under Absolute Maximum
Ratings may cause permanent device failure. Functionality
at or above these limits is not implied. Exposure to
Absolute Maximum Ratings for extended periods may
affect device reliability.
OPERATING RANGES
VCCA, Analog Supply . . . . . . . . . . . . . +5.0 V ±0.25 V
VCCA, Analog Supply . . . . . . . . . . . . . . VCCD ±10 mV
VCCD, Digital Supply . . . . . . . . . . . . . +5.0 V ±0.25 V
DGND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 V
AGND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±50 mV
Ambient Temperature . . . . . . . . . . . 0°C < TA < +70°C
Ambient Relative Humidity . . . . . . . . . . . 15% to 95%
Operating Ranges define those limits between which
functionality of the device is guaranteed by production testing.
Functionality of the device from 0°C to +70°C is guaranteed
by production testing. Performance from –40°C to +85°C is
guaranteed by characterization and periodic sampling of
production units.
SLAC Products
11
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet Am79Q031.PDF ] | |
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