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RPM871-H7 Datasheet(PDF) 5 Page - Rohm |
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RPM871-H7 Datasheet(HTML) 5 Page - Rohm |
5 / 7 page RPM871-H7 Photo Link Module ! ! ! ! Timing chart less than 45 µs (emitting) more than 45 µs approximately 45 µs less than 2.3 µs more than 2.3 µs approximately 2.3 µs approximately 2.3 µs pull up to VCC at approximately 300k Ω (emitting) (emitting) (Emitting side) (Detecting side) TXD (7pin) Internal LED (Light output) Light input RXD (6pin) PWDOWN (5pin) ! ! ! ! Attached components Recommended values Part symbol C1 Recommended value Notice 1 µF, tantalum or ceramic Ex.) TCFGA1A105M8R (ROHM) Bigger capacitance is recommended with much noise from power supply R1 7.5 Ω±5%, 1/4W (VLEDVCC =2.8V) More than 60cm distance, more than 4[ µW/cm2] at detecting side. (vs ver1.0) More than 46cm distance, more than 6.8[ µW/cm2] at detecting side. (vs RPM871-H7) In case of using R1 with different condition from the above, formula is as follows : LED resistance value : R1[ Ω], LED average consumption current : ILED[mA], Supply voltage : VLEDVCC[V], Link distance : d[cm] (Including LED’s distribution within ±15deg) R1=T × (VLEDVCC−1.45) / d2−3.5 [Ω] ILED=Duty × (VLEDVCC−1.36) / (R1+2.5) [A] Duty : LED duty at emitting T : 17300 (vs. RPM871-H7), 29400 (vs. ver1.0) ∗ Please set up to be ILED / Duty < 200[mA] (Duty < 20%) |
Similar Part No. - RPM871-H7 |
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Similar Description - RPM871-H7 |
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