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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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PCA9600DPZ датащи(PDF) 13 Page - NXP Semiconductors |
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PCA9600DPZ датащи(HTML) 13 Page - NXP Semiconductors |
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13 / 32 page  NXP Semiconductors PCA9600 Dual bidirectional bus buffer PCA9600 SCL RX TX 002aac851 SX VCC TY RY SY R2 R2 C2 C2 I2C-BUS MASTER SDA VCC1 GND R1 R1 BAT54A cable propagation delay ≈ 5 ns/m BAT54A R1 R1 PCA9600 RX TX TY RY VCC SX SY R2 R2 SCL SDA VCC2 GND I2C-BUS SLAVE(S) C2 C2 +V cable drive Figure 14. Driving ribbon or flat telephone cables Refer to Figure 14. Set master nominal SCL VCC1 (V) +V cable (V) VCC2 (V) R1 (Ω) R2 (kΩ) C2 (pF) Cable length (m) Cable capacitance Cable delay HIGH period (ns) LOW period (ns) Effective bus clock speed (kHz) Max. slave response delay 5 12 5 750 2.2 400 250 n/a (delay based) 1.25 μs 600 3 850 125 normal specification 400 kHz parts 5 12 5 750 2.2 220 100 n/a (delay based) 500 ns 600 2 450 195 normal specification 400 kHz parts 3.3 5 3.3 330 1 220 25 1 nF 125 ns 260 770 620 meets Fm+ specification 3.3 5 3.3 330 1 100 3 120 pF 15 ns 260 720 690 meets Fm+ specification Table 7. Examples of bus capability For more examples of faster alternatives for driving over longer cables such as Cat5 communication cable, see AN10658. Communication at 1 MHz is possible over short cables and > 400 kHz is possible over 50 m of cable. PCA9600 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2021. All rights reserved. Product data sheet Rev. 6.1 — 20 December 2021 13 / 32 |
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