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PCA9517 Datasheet(PDF) 10 Page - NXP Semiconductors |
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PCA9517 Datasheet(HTML) 10 Page - NXP Semiconductors |
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10 / 19 page  PCA9517_3 © NXP B.V. 2007. All rights reserved. Product data sheet Rev. 03 — 30 January 2007 10 of 19 NXP Semiconductors PCA9517 Level translating I2C-bus repeater [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 A-side with envelope noise must be below 0.3VCCA 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 the B-side, and 167 Ω pull-up resistance and 57 pF load capacitance on the A-side. Different load resistance and capacitance will alter the RC time constant, thereby changing the propagation delay and transition times. [2] Pull-up voltages are VCCA on the A-side and VCCB on the B-side. [3] Typical values were measured with VCCA = 3.3 V at Tamb =25 °C, unless otherwise noted. [4] The tPLH delay data from B-side to A-side is measured at 0.5 V on the B-side to 0.5VCCA on the A-side when VCCA is less than 2 V, and 1.5 V on the A-side if VCCA is greater than 2 V. [5] Typical value measured with VCCA = 2.7 V at Tamb =25 °C. [6] The proportional delay data from A-side to B-side is measured at 0.3VCCA on the A-side to 1.5 V on the B-side. [7] 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 - +0.3VCCB V VIH HIGH-level input voltage 0.7VCCB - 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 −1- +1 µA Ci input capacitance VI = 3.0 V or 0 V - 6 7 pF Table 4. 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 5. 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 B-side to A-side; Figure 12 [4] 100 170 250 ns tPHL HIGH-to-LOW propagation delay B-side to A-side; Figure 10 VCCA ≤ 2.7 V [5] 30 80 110 ns VCCA ≥ 3 V 10 66 300 ns tt(LH) LOW-to-HIGH transition time A-side; Figure 10 10 20 30 ns tt(HL) HIGH-to-LOW transition time A-side; Figure 10 VCCA ≤ 2.7 V [5] 1 77 105 ns VCCA ≥ 3 V 20 70 175 ns tPLH LOW-to-HIGH propagation delay A-side to B-side; Figure 11 [6] 25 53 110 ns tPHL HIGH-to-LOW propagation delay A-side to B-side; Figure 11 [6] 60 79 230 ns tt(LH) LOW-to-HIGH transition time B-side; Figure 11 120 140 170 ns tt(HL) HIGH-to-LOW transition time B-side; Figure 11 30 48 90 ns tsu set-up time EN HIGH before START condition [7] 100 - - ns th hold time EN HIGH after STOP condition [7] 100 - - ns |
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