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SN74BCT2420FN 데이터시트(PDF) 9 Page - Texas Instruments

부품명 SN74BCT2420FN
상세설명  NuBus ADDRESS/DATA TRANSCEIVERS AND REGISTERS
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SN74BCT2420FN 데이터시트(HTML) 9 Page - Texas Instruments

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SN74BCT2420
NuBus
™ ADDRESS/DATA TRANSCEIVERS AND REGISTERS
SDIS007A – D3159, NOVEMBER 1988 – REVISED JANUARY 1989
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
9
PARAMETER MEASUREMENT INFORMATION
Waveform 2
Waveform 1
S1 Closed
S1 Open
0.3 V
1.3 V
1.3 V
ENABLE AND DISABLE TIMES,3-STATE OUTPUTS
VOLTAGE WAVEFORMS
PROPAGATION DELAY TIMES
VOLTAGE WAVEFORMS
0.3 V
0 V
1.3 V
3.5 V
0.3 V
3.5 V
1.3 V
VOH
VOL
tPHZ
tPLZ
tPZH
tPZL
(see Note B)
(see Note B)
enabling)
(low-level
Control
Output
tPHL
tPLH
tPLH
VOL
VOH
1.3 V
1.3 V
1.3 V
1.3 V
1.3 V
1.3 V
3.5 V
0.3 V
VOL
VOH
tPHL
Out-of-Phase
Output
In-Phase
Output
Input
SETUP AND HOLD TIMES
VOLTAGE WAVEFORMS
Data
Input
Timing
Input
th
tsu
1.3 V
1.3 V
1.3 V
0.3 V
3.5 V
0.3 V
3.5 V
1.3 V
1.3 V
tw
3.5 V
0.3 V
1.3 V
PULSE DURATIONS
VOLTAGE WAVEFORMS
High-Level
Pulse
0.3 V
3.5 V
tw
1.3 V
A15–A0, D15–D0
3–STATE OUTPUTS
LOAD CIRCUIT FOR
R2
(See Note A)
CL
VCC
R1
S1
AD15–AD0
NuBus
™ INTERFACE
LOAD CIRCUIT FOR
R2
(See Note A)
CL
R1
S1
VCC
SSEQ, IDEQ
TOTEM-POLE OUTPUTS
BI-STATE
LOAD CIRCUIT FOR
Test
Point
RL
(See Note A)
CL
From Output
Under Test
From Output
Under Test
Test
Point
From Output
Under Test
Test
Point
Low-Level
Pulse
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 condition such that the output is high except when disabled by the output control.
C. C. All input pulses have the following characteristics: PRR
≤ 1 MHz, tr = tf = 2 ns, duty cycle = 50%
D. The outputs are measured one at a time with one transition per measurement.
Figure 1


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