поискавой системы для электроныых деталей |
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TC7MBL3126CFK датащи(PDF) 8 Page - Toshiba Semiconductor |
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TC7MBL3126CFK датащи(HTML) 8 Page - Toshiba Semiconductor |
8 / 12 page TC7MBL3125C,3126CFT/FK/FTG 2008-10-01 8 Rise and Fall Times (tr / tf) of the TC7MBL3125C, 3126C I/O Signals The tr(out) and tf(out) values of the output signals are affected by the CR time constant of the input, which consists of the switch terminal capacitance (CI/O) and the on-resistance (RON) of the input. In practice, the tr(out) and tf(out) values are also affected by the circuit’s capacitance and resistance components other than those of the TC7MBL3125C, 3126C. The tr(out) / tf(out) values can be approximated as follows. (Figure 3 shows the test circuit.) tr(out) / tf(out) (approx) = - ( CI/O + CL ) ・ (RDRIVE+ RON) ・ ln ( ( ( VOH – VOL ) – VM) / ( VOH – VOL ) ) where RDRIVE is the output impedance of the previous-stage circuit. Calculation example: tr(out) (approx) = - ( 7.5 + 15 )E-12 ・ ( 120 + 6.5) ・ ln ( ( ( 3.0 - 0 ) – 1.5 ) / ( 3.0 – 0 ) ) ≈ 2.0 ns Calculation conditions: VCC = 3.0V , CL = 15pF , RDRIVE = 120Ω(output impedance of the previous IC), VM = 1.5V (VCC / 2) Output of the previous IC = digital (i.e., high-level voltage = VCC; low-level voltage = GND) VCC Symbol 3.3 ± 0.3 V 2.5 ± 0.2 V 1.8 ± 0.15 V VM VCC / 2 VCC / 2 VCC / 2 Figure 3 Test Circuit Measure RDRIVE Previous IC RDRIVE = output impedance of the previous IC VCC GND Waveform generated without the TC7MBL3125C,3126C Measure An/Bn CI/O (Switch On) TC7MBL3125C TC7MBL3126C RDRIVE Previous IC Bn/An RDRIVE = output impedance of the previous IC RON VOL VOH VM tr(out) VM tf(out) Waveform generated with the TC7MBL3125C,3126C added |
Аналогичный номер детали - TC7MBL3126CFK |
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Аналогичное описание - TC7MBL3126CFK |
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