The MAX774 ISDN ring-tone power-supply (IRG) evaluation
kit (EV kit) provides the high voltages required for
implementing a plain old telephone system (POTS) interface
on ISDN modems and line cards. It is a fully assembled
and tested board that provides a tightly regulated,
-24V output for powering off-hook voice communication
and a -70V output for on-hook, ring-tone generation.
The EV kit is designed for applications that implement
the telephone interface using subscriber line interface
circuit (SLIC) ICs, such as the AM79R79 from AMD and
comparable products from Lucent, Harris, and other
vendors. Its design feeds back the -24V output, achieving
tight regulation for clean voice-signal transmission.
An economical, off-the-shelf, surface-mount transformer
reduces system cost and size. Compact design conserves
board area. High efficiency and reduced quiescent
current make this design the optimal solution for
green PC and portable designs.
The MAX774 IRG EV kit can also be used to evaluate
the MAX775/MAX776. It has a layout that allows modification
for -48V output operation as well as adaptation
for lower-voltage European applications.
주요기능
애플리케이션/용도
+3V to +16.5V Operating Range
Tightly Regulated, -24V Output for Off-Hook
Voice Communication
-70V Output Supports a Five-Ringer-Equivalent
Load (VIN > 10.5V)
필요한 것을 찾지 못하셨나요?
Maxim 애플리케이션 엔지니어에게 문의하십시오. 부품을 찾는데 필요한 전문가의 도움이 보통 업무일 1일 이내에 제공됩니다.
부품번호 suffix: T 또는 T&R = 테잎 앤 릴,
+ = RoHS/lead-free,
# = RoHS/lead 예외.추가 정보: 전체 데이터 시트 또는 부품번호 규칙
*일부 패키지는 크기 편차(variation)를 가지며 이 값은 도면 상에 제시되어 있습니다. “패키지 코드/편차”는 해당 제품이 사용하고 있는 편차를 보여줍니다. 부품번호 suffix에 "+", "#", "-"는 RoHS 준수 상태를 나타냅니다. 패키지 도면에 suffix 문자는 다를 수 있습니다.
다운로드