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AM7945JC

Description
Subscriber Line Interface Circuit
CategoryWireless rf/communication    Telecom circuit   
File Size147KB,18 Pages
ManufacturerAMD
Websitehttp://www.amd.com
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AM7945JC Overview

Subscriber Line Interface Circuit

AM7945JC Parametric

Parameter NameAttribute value
Is it Rohs certified?incompatible
MakerAMD
Parts packaging codeQFJ
package instructionQCCJ, LDCC32,.5X.6
Contacts32
Reach Compliance Codeunknow
battery fedCONSTANT CURRENT
Battery powered-19 TO -56.5 V
mix2-4 CONVERSION
JESD-30 codeR-PQCC-J32
JESD-609 codee0
length13.97 mm
Negative supply voltage rating-5 V
maximum noise12 dBrnC
Number of functions1
Number of terminals32
Maximum operating temperature70 °C
Minimum operating temperature
PSRR-Mi28 dB
Package body materialPLASTIC/EPOXY
encapsulated codeQCCJ
Encapsulate equivalent codeLDCC32,.5X.6
Package shapeRECTANGULAR
Package formCHIP CARRIER
power supply+-5 V
Certification statusNot Qualified
Maximum seat height3.556 mm
Maximum slew rate8.5 mA
Nominal supply voltage5 V
surface mountYES
Telecom integrated circuit typesSLIC
Temperature levelCOMMERCIAL
Terminal surfaceTin/Lead (Sn/Pb)
Terminal formJ BEND
Terminal pitch1.27 mm
Terminal locationQUAD
width11.43 mm
Am7945
Subscriber Line Interface Circuit
DISTINCTIVE CHARACTERISTICS
s
Programmable constant-current feed
s
Current gain = 200
s
Programmable loop-detect threshold
s
Low power Standby state
s
Ground-key detector
s
Tip Open state for ground-start lines
s
–19 V to –56.5 V battery operation
s
On-chip Thermal Management (TMG) feature
s
Two-wire impedance set by single external
impedance
s
On-hook transmission
s
On-chip ring relay driver and relay snubber
circuit
s
Ideal for low cost PABX and key telephone
systems
BLOCK DIAGRAM
TMG
A(TIP)
Ring Relay
Driver
RINGOUT
C1
C2
HPA
Two-Wire
Interface
HPB
Signal
Transmission
B(RING)
Off-Hook
Detector
Ground-Key
Detector
Input Decoder
and Control
C3
E0
E1
DET
RSN
VTX
RD
Power-Feed
Controller
DA
DB
VBAT
BGND
Ring-Trip
Detector
RDC
CAS
VCC
VEE
AGND/DGND
Publication#
18408
Rev:
D
Amendment:
/0
Issue Date:
October 1999

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