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74LVCH8T245DBRG4 数据表(PDF) 8 Page - Texas Instruments |
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74LVCH8T245DBRG4 数据表(HTML) 8 Page - Texas Instruments |
8 / 22 page www.ti.com 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: PRRv10 MHz, ZO = 50 Ω, 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. J. All parameters and waveforms are not applicable to all devices. 1.8 V ± 0.15 V 2.5 V ± 0.2 V 3.3 V ± 0.3 V 5 V ± 0.5 V 2 k Ω 2 k Ω 2 k Ω 2 k Ω VCCO RL 0.15 V 0.15 V 0.3 V 0.3 V VTP CL 15 pF 15 pF 15 pF 15 pF SN74LVCH8T245 8-BIT DUAL-SUPPLY BUS TRANSCEIVER WITH CONFIGURABLE VOLTAGE TRANSLATION AND 3-STATE OUTPUTS SCES637A – AUGUST 2005 – REVISED FEBRUARY 2007 Figure 1. Load Circuit and Voltage Waveforms 8 Submit Documentation Feedback |
类似零件编号 - 74LVCH8T245DBRG4 |
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类似说明 - 74LVCH8T245DBRG4 |
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