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74ACT11640DW Scheda tecnica(PDF) 4 Page - Texas Instruments

Il numero della parte 74ACT11640DW
Spiegazioni elettronici  OCTAL BUS TRANSCEIVERS WITH 3-STATE OUTPUTS
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74ACT11640DW Scheda tecnica(HTML) 4 Page - Texas Instruments

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54ACT11640, 74ACT11640
OCTAL BUS TRANSCEIVERS
WITH 3STATE OUTPUTS
SCAS027A − D2957, JULY 1987 − REVISED APRIL 1993
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
POST OFFICE BOX 1443
HOUSTON, TEXAS 77001
2−4
switching characteristics over recommended ranges of supply voltage and operating free-air
temperature (unless otherwise noted) (see Figure 1)
PARAMETER
FROM
TO
TA = 25°C
54ACT11640
74ACT11640
UNIT
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
MIN
TYP
MAX
MIN
MAX
MIN
MAX
UNIT
tPLH
A or B
B or A
1.5
6.3
9.6
1.5
11
1.5
10.5
ns
tPHL
A or B
B or A
1.5
5.7
8.6
1.5
10
1.5
9.5
ns
tPZH
G
A or B
1.5
8.8
12.2
1.5
14.2
1.5
13.4
ns
tPZL
G
A or B
1.5
8.4
12.3
1.5
14.5
1.5
13.6
ns
tPHZ
G
A or B
1.5
9.1
12.9
1.5
14.5
1.5
13.9
ns
tPLZ
G
A or B
1.5
9.6
13.1
1.5
15
1.5
14.2
ns
operating characteristics, VCC = 5 V, TA = 25°C
PARAMETER
TEST CONDITIONS
TYP
UNIT
Cpd
Power dissipation capacitance per transceiver
Outputs enabled
CL = 50 pF,
f = 1 MHz
45
pF
Cpd
Power dissipation capacitance per transceiver
Outputs disabled
CL = 50 pF,
f = 1 MHz
12
pF
PARAMETER MEASUREMENT INFORMATION
From Output
Under Test
CL = 50 pF
(see Note A)
LOAD CIRCUIT
S1
2
× VCC
500
500
tPLH
tPHL
Output
Control
(low-level
enabling)
Output
Waveform 1
S1 at 2
× VCC
(see Note C)
Output
Waveform 2
S1 at GND
(see Note C)
VOL
VOH
tPZL
tPZH
tPLZ
tPHZ
1.5 V
1.5 V
1.5 V
1.5 V
[ VCC
3 V
0 V
50% VCC
50% VCC
VOH
VOL
0 V
50% VCC
20% VCC
50% VCC
80% VCC
[ 0 V
3 V
GND
Open
Input
(see Note B)
Output
VOLTAGE WAVEFORMS
VOLTAGE WAVEFORMS
tPLH/tPHL
tPLZ/tPZL
tPHZ/tPZH
Open
2
× VCC
GND
TEST
S1
NOTES: A. CL includes probe and jig capacitance.
B. All input pulses are supplied by generators having the following characteristics: PRR
≤ 10 MHz, ZO = 50 Ω, tr = 3 ns, tf = 3 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 input transition per measurement.
Figure 1. Load Circuit and Voltage Waveforms


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