Datasheet

   
  
  
SDLS213B − DECEMBER 1983 − REVISED NOVEMBER 2004
13
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TYPICAL CHARACTERISTICS (SN54/74221 ONLY)
†
Figure 3
Median
Relative Frequency of Occurrence
DISTRIBUTION OF UNITS
FOR
OUTPUT PULSE
t
w
− Output Pulse
V
CC
= 5 V
T
A
= 25°C
Median
+0.5%
Median
+0.5%
Figure 4
0
− 0.5
−1
4.5 4.75 5
0.5
VARIATION IN OUTPUT PULSE
vs
SUPPLY VOLTAGE
1
5.25 5.5
− Variation in Output Pulse − %∆ t
w
V
CC
− Supply Voltage − V
C
ext
= 60 pF
R
ext
= 10 kΩ
T
A
= 25°C
t
w
≈ 420 ns
at V
CC
= 5 V
Figure 5
−25−50−75
0
− 0.5
−1
02550
− Variation in Output Pulse − %
0.5
VARIATION IN OUTPUT PULSE
vs
FREE-AIR TEMPERATURE
1
75 100 125
T
A
− Free-Air Temperature − °C
∆ t
w
V
CC
= 5 V
C
ext
= 60 pF
R
ext
= 10 kΩ
t
w
≈ 420 ns
at T
A
= 25°C
OUTPUT PULSE
vs
TIMING RESISTOR VALUE
Figure 6
100 ns
10 ns
12 4710
10 ms
1 ms
20 40 70 100
− Output Pulset
w
100 µs
10 µs
1 µs
V
CC
= 5 V
T
A
= 25°C
FµC
ext
= 1
FµC
ext
= 0.1
FµC
ext
= 0.01
C
ext
= 1000 pF
C
ext
= 100 pF
C
ext
= 10 pF
See Note A
R
ext
− Timing Resistor Value − kΩ
†
Data for temperatures below 0°C and above 70°C, and for supply voltages below 4.75 V and above 5.25 V are applicable for the SN54221 only.
NOTE A: These values of resistance exceed the maximum recommended for use over the full military temperature range of the SN54221.