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SN74HCS244-Q1 データシート(PDF) 7 Page - Texas Instruments

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部品番号. SN74HCS244-Q1
部品情報  SN74HCS244-Q1 Automotive Octal Buffers and Line Drivers With Schmitt-Trigger Inputs and 3-State Outputs
ダウンロード  18 Pages
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メーカー  TI [Texas Instruments]
ホームページ  http://www.ti.com
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SN74HCS244-Q1 Datasheet(HTML) 7 Page - Texas Instruments

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7 Parameter Measurement Information
Phase relationships between waveforms were chosen arbitrarily. All input pulses are supplied by generators
having the following characteristics: PRR ≤ 1 MHz, ZO = 50 Ω, tt < 2.5 ns.
For clock inputs, fmax is measured when the input duty cycle is 50%.
The outputs are measured one at a time with one input transition per measurement.
CL
(1)
From Output
Under Test
Test
Point
(1) CL includes probe and test-fixture capacitance.
Figure 7-1. Load Circuit
50%
Input
50%
VCC
0 V
50%
50%
VOH
VOL
tPLH
(1)
tPHL
(1)
VOH
VOL
tPHL
(1)
tPLH
(1)
Output
Output
50%
50%
(1) The greater between tPLH and tPHL is the same as tpd.
Figure 7-2. Voltage Waveforms Propagation Delays
VOH
VOL
Output
VCC
0 V
Input
tf
(1)
tr
(1)
90%
10%
90%
10%
tr
(1)
90%
10%
tf
(1)
90%
10%
(1) The greater between tr and tf is the same as tt.
Figure 7-3. Voltage Waveforms, Input and Output Transition Times
www.ti.com
SN74HCS244-Q1
SCLS821 – JULY 2020
Copyright © 2020 Texas Instruments Incorporated
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