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If you have obtained an original manufacturer’s datasheet (e.g., from DDD or Bel), pay special attention to these sections: 9e102 datasheet
: High efficiency even at light loads due to ROHM's Simple Light Load Mode (SLLM™). Package : Standard SOP-J8 (4.90 mm x 6.00 mm x 1.65 mm). 2. Key Specifications : If you have obtained an original manufacturer’s
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If you have a specific 9E102 variant (e.g., a black transistor-style package), please consult the service manual—some legacy RF modules used proprietary coding. When in doubt, measure twice, solder once. from DDD or Bel)