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MC145012DW データシート(PDF) 5 Page - Freescale Semiconductor, Inc |
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MC145012DW データシート(HTML) 5 Page - Freescale Semiconductor, Inc |
5 / 14 page Sensors Freescale Semiconductor 5 MC145012 Table 3. AC Electrical Characteristics (Reference Timing Diagram Figure 6 and Figure 7) (TA = 25°C, VDD = 9.0 V, Component Values from Figure 8: R1 = 100.0 KΩ, C3 = 1500.0 pF, R2 = 7.5 MΩ). No. Parameter Symbol Test Condition Clocks Min (6) Typ (7) Max(6) Unit 1 Oscillator Period 1/FOSC Free-Running Sawtooth Measured at Pin 12 1.0 7.0 7.9 8.6 ms 2 LED Pulse Period TLED No Local Smoke, and No Remote Smoke 4096 28.8 32.4 35.2 s 3 Remote Smoke, but No Local Smoke — Extinguished 4 Local Smoke 64 0.45 — — 5 Push-button Test 64 0.45 — — 6 LED Pulse Width and Strobe Pulse Width TW(LED), TW(STB) 1.0 7.0 — 8.6 ms 7 IRED Pulse Period TIRED Smoke Test 1024 7.2 8.1 8.8 s 8 IRED Pulse Period TIRED Chamber Sensitivity Test, without Local Smoke 4096 28.8 32.4 35.2 s 9 Push-button Test 128 0.9 1.0 1.1 10 IRED Pulse Width TW(IRED) TF* 94 — 116 µs 11 IRED Rise Time TR — — — 30 12 IRED Fall Time TF — — — 200 µs 13 Silver and Brass Temporal Modulation Pulse Width TON 64 0.45 0.5 0.55 s 14 TOFF 0.45 0.5 0.55 15 TOFFD 192 1.35 1.52 1.65 16 Silver and Brass Chirp Pulse Period TCH Low Supply or Degraded Chamber Sensitivity 4096 28.8 32.4 35.2 s 17 Silver and Brass Chirp Pulse Width TWCH 1 7.0 7.9 8.6 ms 18 Rising Edge on I/O to Smoke Alarm Response Time TRR Remote Smoke, No Local Smoke — — 2.0 (8) — s 19 Strobe Out Pulse Period TSTB Smoke Test 1024 7.2 8.1 8.8 s 20 Chamber Sensitivity Test, without Local Smoke 4096 28.8 32.4 35.2 21 Low Supply Test, without Local Smoke 4096 28.8 32.4 35.2 22 Push-button Test — — 1.0 — Notes 6. Oscillator period T (= Tr + Tf) is determined by the external components R1, R2, and C3 where TR = (0.6931) R2 C3 and TF = (0.6931) R1 * C3. The other timing characteristics are some multiple of the oscillator timing as shown in the table. The timing shown should accommodate the NFPA 72, ANSI S3.41, and ISO 8201 audible emergency evacuation signals. 7. Typicals are not guaranteed. 8. Time is typical - depends on what point in cycle signal is applied. |
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同様の説明 - MC145012DW |
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