AN1500A South African Micro-Electronic Systems, AN1500A Datasheet - Page 3

• Manufacturer Part Number: AN1500A
• Description: Single Chip Telephone Demo Board
• Manufacturer: South African Micro-Electronic Systems

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16.1
16.2 S
16.3 B
16.4 VMOS-FET
16.5 VMOS-FET
16.6 C
16.7 O
16.8 DC-
18.1 Q
19.1 R
21.1 T
21.2 L
21.3 EMC
21.4 B
AN1500A
SHUNT- AND RINGER TRANSISTORS ..................................................................................................... 20
ON-HOOK CONDITIONS .............................................................................................................................. 20
RINGING MODE ............................................................................................................................................ 21
OSCILLATOR INPUT .................................................................................................................................... 21
EMC & RFI ISSUES ....................................................................................................................................... 21
BOARD SCHEMATIC .................................................................................................................................... 23
BOARD LAYOUT........................................................................................................................................... 24
PART LIST ..................................................................................................................................................... 25
APPLICATIONS ............................................................................................................................................. 26
LIABILITY AND COPYRIGHT STATEMENT ................................................................................................ 27
ELECTRICAL REQUIREMENTS
AYOUT HINTS
ECHNOLOGY
INGLE BIPOLAR TRANSISTOR
IPOLAR DARLINGTON TRANSISTOR
LOCKING OF
URRENT
INGING FREQUENCY COMPARATOR
VERVOLTAGE PROTECTION OF THE
UIESCENT CURRENT PATH
MASK FOR VARIOUS HOOK TRANSISTOR ARRANGEMENTS
BLOCKING PARTS
L
IMITING
WITH SURGE PROTECTION
WITH OVERCURRENT PROTECTION
: .............................................................................................................................................. 21
AGND: ................................................................................................................................... 22
: ............................................................................................................................................. 21
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: ................................................................................................................................ 22
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sames
sames
sames
sames
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PCB:..................................................................................................... 19
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