SN55451B, SN55452B, SN55453B, SN55454B
SN75451B, SN75452B, SN75453B, SN75454B
DUAL PERIPHERAL DRIVERS
SLRS021B – DECEMBER 1976 – REVISED SEPTEMBER 1999
†
logic diagram (positive logic)
logic symbol
1
3
1A
2
&
3
5
1
2
1Y
1Y
2Y
1A
1B
1B
6
2A
7
5
4
6
7
2Y
2A
2B
2B
†
ThissymbolisinaccordancewithANSI/IEEEStd91-1984
and IEC publication 617-12.
GND
Pin numbers shown are for the D, JG, and P packages.
schematic (each driver)
FUNCTION TABLE
(each driver)
V
Y
CC
A
L
B
L
Y
4 kΩ
1.6 kΩ
130 Ω
L (on state)
L (on state)
L (on state)
H (off state)
L
H
L
H
H
H
A
B
positive logic:
Y = AB or A+B
500 Ω
1 kΩ
GND
Resistor values shown are nominal.
electrical characteristics over recommended operating free-air temperature range
SN55451B
SN75451B
‡
PARAMETER
UNIT
TEST CONDITIONS
§
§
MIN TYP
MAX
MIN TYP
MAX
V
V
Input clamp voltage
V
V
= MIN,
= MIN,
= 100 mA
I = –12 mA
–1.2
–1.5
–1.2
–1.5
V
IK
CC
I
V
IL
V
IL
V
IH
= 0.8 V,
= 0.8 V,
= MIN,
CC
0.25
0.5
0.8
0.25
0.4
I
OL
Low-level output voltage
V
OL
V
= MIN,
CC
= 300 mA
0.5
0.5
0.7
I
OL
V
CC
V
OH
= MIN,
= 30 V
I
High-level output current
300
100
µA
OH
I
I
I
I
I
Input current at maximum input voltage
High-level input current
V
CC
V
CC
V
CC
V
CC
V
CC
= MAX, V = 5.5 V
1
40
1
40
mA
µA
I
I
= MAX, V = 2.4 V
IH
I
Low-level input current
= MAX, V = 0.4 V
–1
7
–1.6
11
–1
7
–1.6
11
mA
mA
mA
IL
I
Supply current, outputs high
Supply current, outputs low
= MAX, V = 5 V
I
CCH
CCL
= MAX, V = 0
52
65
52
65
I
‡
§
For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions.
All typical values are at V
= 5 V, T = 25°C.
CC
A
switching characteristics, V
= 5 V, T = 25°C
A
CC
PARAMETER
TEST CONDITIONS
MIN
TYP
18
18
5
MAX
25
25
8
UNIT
t
t
t
t
Propagation delay time, low-to-high-level output
Propagation delay time, high-to-low-level output
Transition time, low-to-high-level output
PLH
PHL
TLH
THL
I
R
≈ 200 mA,
= 50 Ω,
C = 15 pF,
L
See Figure 1
O
L
ns
Transition time, high-to-low-level output
7
12
SN55451B
SN75451B
V –6.5
S
V
= 20 V,
I
O
≈ 300 mA,
S
V
OH
High-level output voltage after switching
mV
See Figure 2
V
S
–6.5
3
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