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參數(shù)資料
| 型號(hào)： | AM79534-1DC |
| 廠商： | ADVANCED MICRO DEVICES INC |
| 元件分類： | 模擬傳輸電路 |
| 英文描述： | Subscriber Line Interface Circuit |
| 中文描述： | TELECOM-SLIC, CDIP28 |
| 封裝： | CERAMIC, DIP-28 |
| 文件頁數(shù)： | 4/20頁 |
| 文件大?。?/td> | 266K |
| 代理商： | AM79534-1DC |
4
Am7953X Data Sheet
PIN DESCRIPTIONS
Pin Names
Type
Description
AGND
Gnd
Analog (quiet) ground.
A(TIP)
Output
Output of A(TIP) power amplifier.
BGND
Gnd
Battery (power) ground.
B(RING)
Output
Output of B(RING) power amplifier.
C3
–
C1
Input
Decoder. TTL compatible. C3 is MSB and C1 is LSB.
C4
Input
Test relay driver command (Am79534). TTL compatible. A logic Low enables the driver.
CHCLK
Input
Chopper clock. Input to switching regulator (TTL compatible). Frequency = 256 kHz (nominal).
CHS
Input
Chopper stabilization. Connection for external stabilization components.
DA
Input
Ring-trip negative. Negative input to ring-trip comparator.
DB
Input
Ring-trip positive. Positive input to ring-trip comparator.
DET
Output
Detector. A logic Low indicates that the selected detector is tripped. The detector is selected by
the logic inputs (C3
–
C1, E0, and E1). The output is open-collector with a built-in 15 k
pull-up
resistor.
DGND
Gnd
Digital ground.
E0
Input
Read enable. A logic High enables DET. A logic Low disables DET.
E1
Input
Ground-key enable. E1 = High connects the ground-key detector to DET, and E1 = Low connects
the off-hook or ring-trip detector to DET.
GKFIL
Capacitor
Ground-key filter capacitor connection ( Am79535). An external capacitor for filtering out
high-frequency noise from the ground-key loop can be connected to this pin. An internal 36 k
,
–
20%, +40% resistor is provided to form an RC filter with the external capacitor. In versions that
have a GKFIL pin, 3.3 nF minimum capacitance must be connected from the GKFIL pin to ground.
HPA
Capacitor
High-pass filter capacitor; A(TIP) side of high-pass filter capacitor.
HPB
Capacitor
High-pass filter capacitor; B(RING) side of high-pass filter capacitor.
L
Output
Switching regulator power transistor. Connection point for filter inductor and anode of catch diode.
This pin has up to 60 V of pulse waveform on it and must be isolated from sensitive circuits. Keep
the diode connections short because of the high currents and high di/dt.
QBAT
Battery
Quiet battery. Filtered battery supply for the signal processing circuits.
RD
Resistor
Detect resistor. Threshold modification and filter point for the off-hook detector.
RDC
Resistor
DC feed resistor. Connection point for the DC feed-current programming network which also
connects to the Receiver Summing Node (RSN). V
RDC
is negative for normal polarity and
positive for reverse polarity.
RINGOUT
Output
Ring relay driver; sourcing from BGND with internal diode to QBAT.
RSN
Input
Receive summing node. The metallic current ( AC and DC) between A(TIP) and B(RING) is equal
to 1000 times the current into this pin. The networks that program receive gain, two-wire
impedance, and feed current all connect to this node. This node is extremely sensitive. Route the
256 kHz chopper clock and switch lines away from the RSN node.
TESTOUT
Output
Test relay driver (Am79534); sourcing from BGND with internal diode to QBAT.
TP
Thermal
Thermal pin. Connection for heat dissipation. Internally connected to substrate (QBAT). Leave as
open circuit or connected to QBAT. In both cases, the TP pins can connect to an area of copper
on the board to enhance heat dissipation.
VBAT
Battery
Battery supply through an external protection diode.
VCC
Power
+5 V power supply.
VEE
Input
–
5 V power supply.
VREG
Input
Regulated voltage. Provides negative power supply for power amplifiers and connection point for
inductor, filter capacitor, and chopper stabilization.
VTX
Output
Transmit audio. This output is a unity gain version of the A(TIP) and B(RING) metallic voltage. VTX
also sources the two-wire input impedance-programming network connects here.
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| AM79534-1JC | Subscriber Line Interface Circuit |
| AM79534-2JC | Subscriber Line Interface Circuit |
| AM79535 | Subscriber Line Interface Circuit |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AM79534-1JC | 制造商:AMD 制造商全稱:Advanced Micro Devices 功能描述:Subscriber Line Interface Circuit |
| AM79534-1PC | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Subscriber Line Interface Circuit |
| AM79534-2DC | 制造商:AMD 制造商全稱:Advanced Micro Devices 功能描述:Subscriber Line Interface Circuit |
| AM79534-2JC | 制造商:AMD 制造商全稱:Advanced Micro Devices 功能描述:Subscriber Line Interface Circuit |
| AM79534-2PC | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Subscriber Line Interface Circuit |
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