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PDF AM79C031 Data sheet ( Hoja de datos )
| Número de pieza | AM79C031 | |
| Descripción | (AM79C02/03/031) Dual Subscriber Line Audio Processing Circuit Devices | |
| Fabricantes | Legerity | |
| Logotipo |  |
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Am79C02/03/031(A)
Dual Subscriber Line Audio Processing Circuit
(DSLAC™) Devices
DISTINCTIVE CHARACTERISTICS
GENERAL DESCRIPTION
I Software programmable:
The Am79C02/03/031(A) Dual Subscriber Line Audio
— SLIC impedance
Processing Circuit (DSLAC device) integrates the key
— Transhybrid balance
functions of an analog linecard into a single high-per-
formance, programmable dual codec/filter device. The
— Transmit and receive gains
— Equalization
m— Digital I/O pins
— Time Slot Assigner
o— PCM transmit clock edge options
.cI Adaptive transhybrid balance filter
(A suffix only)
UI A-law or µ-law coding
I Dual PCM ports
t4— Up to 8.192 MHz each (128 channels per port)
eI 2.048 MHz or 4.096 MHz master clock
I Direct transformer drive
eI Built-in test modes
hI Low power CMOS
SI Mixed mode (analog and digital) impedance
scaling
taI Performance characteristics guaranteed over
www.Da12 dB gain range
DSLAC device is based on the proven design of the
reliable Am7901A Subscriber Line Audio Processing
Circuit (SLAC™ device). The advanced architecture of
the DSLAC device implements two independent chan-
nels and employs digital filters to allow software control
of transmission, thus providing a cost effective solution
for the analog to PCM function of a linecard.
The Am79C02/03/031(A) DSLAC device’s advanced
CMOS technology makes this an economical device
that has both the functionality and the low power con-
sumption needed in linecard designs to maximize line-
card density at minimum cost. When used with two
Legerity SLICs, the DSLAC device provides software
configurable solutions to the BORSCHT function.
Although the name and logo have changed, the data contained herein
remains the same as the most recent AMD revision of this document.
ataSheet4U.comPublication# 09875 Rev: J Amendment: /0
www.DIssue Date: December 1999
1 page  
ORDERING INFORMATION
Standard Products
Legerity standard products are available in several packages and operating ranges. The order number (Valid Com-
bination) is formed by a combination of the elements below.
Am79C02/03/031 A
JC
TEMPERATURE RANGE
C = Commercial (0°C to 70°C;
Relative Humidity=15% to 85%)*
PACKAGE TYPE
J =44-Pin Plastic Leaded Chip Carrier (PL 044)
—Am79C02
32-Pin Plastic Leaded Chip Carrier (PL 032)
—Am79C03 and 031
DEVICE OPTIONS
Blank = Standard Device
A = Adaptive Transhybrid Balance
Valid Combinations
Am79C02
Am79C03
AJC, JC
Am79C031
DEVICE NUMBER/DESCRIPTION
Am79C02/03/031
Dual Subscriber Line Audio-Processing Circuit (DSLAC Device)
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 
Transmission Characteristics
The gain of the receive path is defined to be 0 dB when a 0 dBm0, 1014 Hz PCM sine wave input results in a nominal
1.55 Vrms for µ-law or 1.56 Vrms for A-law analog output. The gain of the transmit path is 0 dB when a 1.55 Vrms
for µ-law or 1.56 Vrms for A-law, 1014 Hz sine wave analog input results in a level of 0 dBm0 at the digital output.
When relative levels (dBm0) are used in any of the following transmission specifications, the specification holds for any
setting of the AX + GX gain from 0 to 12 dB and the AR + GR loss from 0 to 12 dB. Performance specification for
settings of the AX + GX gain from 12 to 18 dB and the AR + GR loss from 12 to 18 dB is determined as the device
is characterized.
Description
Test Conditions
Min Typ Max Unit Note
Gain accuracy
D to A or A to D
0 dBm0, 1014 Hz
0 dB < |path gain| < 6 dB
25°C to 85°C
0°C
–40°C
–0.20
–0.25
–0.35
+0.20
+0.25
+0.35
Gain accuracy
D to A or A to D
0 dBm0, 1014 Hz
6 dB < |path gain| < 12 dB
70°C to 85°C
25°C
0°C
–40°C
–0.20
–0.25
–0.30
–0.35
+0.20
+0.25
+0.30
+0.35
—
1
1
—
Gain accuracy
analog to analog
or digital to digital
25°C to 85°C
0°C
–40°C
–0.20
–0.25
–0.35
+0.20
+0.25
+0.35
dB
Attenuation distortion
300 Hz to 3400 Hz –0.125
+0.125
2
Single frequency distortion, A to D
–46 3
Single frequency distortion, D to A –6 dB < (GR + AR) < 0 dB
–12 dB < (GR + AR) < –6 dB
–12 dB < (GR + AR) < –6 dB
–12 dB < (GR + AR) < –6 dB
–12 dB < (GR + AR) < –6 dB
–40°C to 85°C
70°C to 85°C
25°C
0°C
–40°C
–46 3
–46 3
–45 3, 4
–43 3, 4
–40 3, 4
Intermodulation distortion
–42
–56
dBr
5
Analog out digital looped back
Idle channel noise
digital input = 0
Digital out analog VIN = 0
weighted
unweighted
A-law
µ-law
A-law
µ-law
–68 dBm0p
–55 dBm0p
–78
12
dBm0p
dBrnc0
6
–68 dBm0p
19 dBrnc0
Crosstalk
same channel
TX to RX
RX to TX
0 dBm0
300 Hz to 3400 Hz
–75
–75
Crosstalk
between channels
TX to TX
TX to RX
RX to TX
RX to RX
0 dBm0
300 Hz to 3400 Hz
–76
–78
–76
–78
Group delay
PCLK ≥ 1.53 MHz
PCLK ≤ 1.03 MHz
B, X, R, and Z filters disabled
630
695
µs
7
Notes:
1. Legerity guarantees less than 0.1% of units fall into the last 0.05 dB of these specification numbers.
2. See Figure 1.
3. With f swept between 0 to 300 Hz and 3400 to 12 kHz, any generated output signals other than f are less than –28 dBm0.
This specification is valid for either transmission path.
4. Legerity guarantees < 0.2% of units are above –46 dB. This relaxed specification applies to only the third harmonic.
5. Intermodulation distortion specification for two signals of same level in the range of –4 dBm0 to –21 dBm0 does not produce
2 • (f1 – f2) component above specified level. 50 Hz IMD specified with 50 Hz signal at –23 dBm0 and signal between 300 Hz
to 3400 Hz at –9 dBm0.
6. No single frequency component in the range above 3800 Hz may exceed a level of –55 dBm0.
7. The Group Delay specification is defined as the sum of the minimum values of the group delays for the transmit and the
receive paths when the transmit and receive time slots are identical and the B, X, R, and Z filters are disabled. For PCLK
frequencies between 1.03 MHz and 1.53 MHz, the group delay may vary from one cycle to the next. See Figure 2.
SLAC Products
11
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet AM79C031.PDF ] | |
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