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SN74ALS2232AFN 数据表(PDF) 7 Page - Texas Instruments

部件名 SN74ALS2232AFN
功能描述  ASYNCHRONOUS FIRST-IN, FIRST-OUT MEMORY
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制造商  TI1 [Texas Instruments]
网页  http://www.ti.com
标志 TI1 - Texas Instruments

SN74ALS2232AFN 数据表(HTML) 7 Page - Texas Instruments

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SN74ALS2232A
64
× 8 ASYNCHRONOUS FIRST-IN, FIRST-OUT MEMORY
SCAS248 – FEBRUARY 1988 – REVISED MARCH 1990
7
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
PARAMETER MEASUREMENT INFORMATION
tPHZ
tPLZ
tPHL
tPLH
0.3 V
tPZL
tPZH
TEST
S1
Open
Open
Open
tPHL
tPZH
tPZL
Closed
Open
Closed
tPHZ
tPLZ
tPLH
tPHL
LOAD CIRCUIT FOR 3-STATE OUTPUTS
From Output
Under Test
Test Point
R1 = 500
S1
CL = 50 pF
7 V
(see Note A)
Open
1.3 V
1.3 V
1.3 V
3.5 V
3.5 V
0.3 V
0.3 V
th
tsu
VOLTAGE WAVEFORMS
SETUP AND HOLD TIMES
Timing
Input
Data
Input
1.3 V
1.3 V
3.5 V
3.5 V
0.3 V
0.3 V
High-Level
Pulse
Low-Level
Pulse
tw
VOLTAGE WAVEFORMS
PULSE DURATION
Input
(see Note B)
Out-of-Phase
Output
1.3 V
1.3 V
1.3 V
1.3 V
1.3 V
1.3 V
1.3 V
1.3 V
1.3 V
1.3 V
3.5 V
3.5 V
0.3 V
0.3 V
VOL
VOH
VOH
VOL
Output
Control
Waveform 1
S1 Closed
(see Note C)
Waveform 2
S1 Open
(see Note C)
0 V
VOH
VOL
3.5 V
In-Phase
Output
0.3 V
tPLH
1.3 V
1.3 V
VOLTAGE WAVEFORMS
PROPAGATION DELAY TIMES
VOLTAGE WAVEFORMS
ENABLE AND DISABLE TIMES, 3-STATE OUTPUTS
SWITCH POSITION TABLE
R2 = 500
NOTES: A. CL includes probe and jig capacitance.
B. All input pulses are supplied by generators having the following characteristics: PRR
≤ 1 MHz, Zo = 50 Ω, tr ≤ 2 ns, tf ≤ 2 ns.
C. 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.
D. The outputs are measured one at a time with one transition per measurement.
Figure 1. Load Circuit and Voltage Waveforms


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