AM7943-2PC AMD (ADVANCED MICRO DEVICES), AM7943-2PC Datasheet - Page 4

• Manufacturer Part Number: AM7943-2PC
• Manufacturer: AMD (ADVANCED MICRO DEVICES)

Specifications of AM7943-2PC

• Lead Free Status / RoHS Status: Supplier Unconfirmed

PIN DESCRIPTIONS
4
AGND/DGND
Pin Names
RINGOUT
B(RING)
C3–C1
A(TIP)
BGND
VBAT
RDC
TMG
CAS
HPA
HPB
RSN
VCC
DET
VEE
VTX
DA
DB
RD
E0
E1
TP
Capacitor
Capacitor
Capacitor
Resistor
Resistor
Thermal
Battery
Output
Output
Output
Output
Output
Power
Power
Type
Input
Input
Input
Input
Input
Input
Gnd
Gnd
—
Decoder. TTL compatible. C3 is MSB and C1 is LSB.
Anti-saturation pin for capacitor to filter reference voltage when operating in anti-
saturation region.
Ring-trip negative. Negative input to ring-trip comparator.
Ring-trip positive. Positive input to ring-trip comparator.
Switchhook detector. When enabled, a logic Low indicates the selected detector is
tripped. The detector is selected by the logic inputs (C3–C1, E1–E0). The output is
open-collector with a built-in 15 k
(PLCC only)
connects the off-hook or ring-trip detector to DET. (PLCC only)
High-Pass Filter Capacitor. A(TIP) side of high-pass filter capacitor.
High-Pass Filter Capacitor. B(RING) side of high-pass filter capacitor.
Detector resistor. Detector threshold set and filter pin.
DC feed resistor. Connection point for the DC feed current programming network. The
other end of the network connects to the receiver summing node (RSN). Connection point
for the DC feed current programming network. The other end of the network connects to
the receiver summing node (RSN). The sign of V
positive for reverse polarity.
Ring Relay Driver.
Receive Summing Node. The metallic current (AC and DC) between A(TIP) and B(RING)
is equal to 200 times the current into this pin. The networks that program receive gain,
two-wire impedance, and feed current all connect to this node.
Thermal management. A resistor connected from this pin to VBAT reduces the on-chip
power dissipation in the normal polarity, Active state only. Refer to Table 2.
voltage. VTX also sources the two-wire input impedance programming network.
Analog and Digital ground.
Output of A(TIP) power amplifier.
Battery (power) ground.
Output of B(RING) power amplifier.
DET Enable. A logic High enables DET. A logic Low disables DET. (DET = Logic High).
Ground-Key Enable. E1 = High connects the ground-key detector to DET. E1 = Low
Battery supply.
+5 V power supply.
–5 V power supply.
Transmit Audio. This output is a unity gain version of the A(TIP) and B(RING) metallic
Thermal pin. Connection for heat dissipation. Internally connected to substrate (VBAT).
Leave as open circuit or connected to VBAT. In both cases, the TP pins can connect to
an area of copper on the board to enhance heat dissipation
Am7943 Data Sheet
F I N A L
Open-collector driver with emitter internally connected to
pull-up resistor.
Description
RDC
is negative for normal polarity and
BGND.