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SN74AVCH4T245PWE4 데이터시트(PDF) 10 Page - Texas Instruments |
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SN74AVCH4T245PWE4 데이터시트(HTML) 10 Page - Texas Instruments |
10 / 17 page SN74AVCH4T245 4BIT DUALSUPPLY BUS TRANSCEIVER WITH CONFIGURABLE VOLTAGE TRANSLATION AND 3STATE OUTPUTS SCES577A – JUNE 2004 – REVISED APRIL 2005 10 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 PARAMETER MEASUREMENT INFORMATION VOH VOL From Output Under Test CL (see Note A) LOAD CIRCUIT S1 2 × VCCO Open GND RL RL tPLH tPHL Output Control (low-level enabling) Output Waveform 1 S1 at 2 × VCCO (see Note B) Output Waveform 2 S1 at GND (see Note B) tPZL tPZH tPLZ tPHZ VCCA/2 VCCA/2 VCCI/2 VCCI/2 VCCI 0 V VCCO/2 VCCO/2 VOH VOL 0 V VCCO/2 VOL + VTP VCCO/2 VOH − VTP 0 V VCCI 0 V VCCI/2 VCCI/2 tw Input VCCA VCCO VOLTAGE WAVEFORMS PROPAGATION DELAY TIMES VOLTAGE WAVEFORMS PULSE DURATION VOLTAGE WAVEFORMS ENABLE AND DISABLE TIMES Output Input tpd tPLZ/tPZL tPHZ/tPZH Open 2 × VCCO GND TEST S1 NOTES: A. CL includes probe and jig capacitance. B. Waveform 1 is for an output with internal conditions such that the output is low, except when disabled by the output control. Waveform 2 is for an output with internal conditions such that the output is high, except when disabled by the output control. C. All input pulses are supplied by generators having the following characteristics: PRR v10 MHz, ZO = 50 Ω, dv/dt ≥ 1 V/ns, dv/dt ≥1 V/ns. D. The outputs are measured one at a time, with one transition per measurement. E. tPLZ and tPHZ are the same as tdis. F. tPZL and tPZH are the same as ten. G. tPLH and tPHL are the same as tpd. H. VCCI is the VCC associated with the input port. I. VCCO is the VCC associated with the output port. 1.2 V 1.5 V ± 0.1 V 1.8 V ± 0.15 V 2.5 V ± 0.2 V 3.3 V ± 0.3 V 2 k Ω 2 k Ω 2 k Ω 2 k Ω 2 k Ω VCCO RL 0.1 V 0.1 V 0.15 V 0.15 V 0.3 V VTP CL 15 pF 15 pF 15 pF 15 pF 15 pF Figure 1. Load Circuit and Voltage Waveforms |
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