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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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PCA9507D датащи(PDF) 12 Page - NXP Semiconductors |
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PCA9507D датащи(HTML) 12 Page - NXP Semiconductors |
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12 / 20 page  PCA9507_1 © NXP B.V. 2008. All rights reserved. Product data sheet Rev. 01 — 7 February 2008 12 of 20 NXP Semiconductors PCA9507 2-wire serial bus extender for HDMI DDC I2C-bus and SMBus [1] LOW-level supply voltage. [2] VIL specification is for the first LOW level seen by the SDAB/SCLB lines. VILc is for the second and subsequent LOW levels seen by the SDAB/SCLB lines. [3] VIL for port A with envelope noise must be below 0.3VCC(A) for stable performance. 10. Dynamic characteristics [1] Times are specified with loads of 1.35 k Ω pull-up resistance and 57 pF load capacitance on port B, and 450 Ω pull-up resistance and 57 pF load capacitance on port A. Different load resistance and capacitance will alter the RC time constant, thereby changing the propagation delay and transition times. [2] Pull-up voltages are VCC(A) on port A and VCC(B) on port B. [3] Typical values were measured with VCC(A) = 3.3 V at Tamb =25 °C, unless otherwise noted. [4] The tPLH delay data from port B to port A is measured at 0.5 V on port B to 0.3VCC(A) on port A. [5] The proportional delay data from port A to port B is measured at 0.3VCC(A) on port A to 0.3VCC(B) on port B. [6] The enable pin, EN, should only change state when the global bus and the repeater port are in an idle state. Enable VIL LOW-level input voltage −0.5 - +0.3VCC(B) V VIH HIGH-level input voltage 0.7VCC(B) - 5.5 V IIL(EN) LOW-level input current on pin EN VI = 0.2 V, EN; VCC = 3.6 V - −10 −30 µA ILI input leakage current VI =VCC −1- +1 µA Ci input capacitance VI = 3.0 V or 0 V - 6 7 pF Table 5. Static characteristics …continued VCC =2.7 V to 5.5 V; GND=0V; Tamb = −40 °Cto+85 °C; unless otherwise specified. Symbol Parameter Conditions Min Typ Max Unit Table 6. Dynamic characteristics VCC =2.7 V to 5.5 V; GND=0V; Tamb = −40 °Cto+85 °C; unless otherwise specified.[1][2] Symbol Parameter Conditions Min Typ[3] Max Unit tPLH LOW-to-HIGH propagation delay port B to port A; Figure 15 [4] 90 165 350 ns tPHL HIGH-to-LOW propagation delay port B to port A; Figure 13 55 91 180 ns tTLH LOW to HIGH output transition time port A; Figure 13 22 48 80 ns tTHL HIGH to LOW output transition time port A; Figure 13 20 42 100 ns tPLH LOW-to-HIGH propagation delay port A to port B; Figure 14 [5] 140 218 310 ns tPHL HIGH-to-LOW propagation delay port A to port B; Figure 14 [5] 130 91 330 ns tTLH LOW to HIGH output transition time port B; Figure 14 100 173 260 ns tTHL HIGH to LOW output transition time port B; Figure 14 20 39 100 ns tsu set-up time EN HIGH before START condition [6] 100 - - ns th hold time EN HIGH after STOP condition [6] 100 - - ns |
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