Datasheet
SN55451B, SN55452B, SN55453B, SN55454B
SN75451B, SN75452B, SN75453B, SN75454B
DUAL PERIPHERAL DRIVERS
SLRS021B – DECEMBER 1976 – REVISED SEPTEMBER 1999
3
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
logic symbol
†
&
5
3
2B
2A
1B
1A
2Y
1Y
7
6
2
1
†
This symbol is in accordance with ANSI/IEEE Std 91-1984
and IEC publication 617-12.
Pin numbers shown are for the D, JG, and P packages.
logic diagram (positive logic)
2B
2A
1B
1A
4
5
3
GND
2Y
1Y
7
6
2
1
FUNCTION TABLE
(each driver)
A
B Y
L L L (on state)
L H L (on state)
H L L (on state)
H H H (off state)
positive logic:
Y = AB or A
+B
electrical characteristics over recommended operating free-air temperature range
PARAMETER
TEST CONDITIONS
‡
SN55451B SN75451B
UNIT
PARAMETER
TEST
CONDITIONS
‡
MIN TYP
§
MAX MIN TYP
§
MAX
UNIT
V
IK
Input clamp voltage V
CC
= MIN, I
I
= –12 mA –1.2 –1.5 –1.2 –1.5 V
V
CC
= MIN, V
IL
= 0.8 V,
025
05
025
04
V
OL
Low level out
p
ut voltage
CC
I
OL
= 100 mA
IL
0
.
25
0
.
5
0
.
25
0
.
4
V
V
OL
Lo
w-
le
v
el
o
u
tp
u
t
v
oltage
V
CC
= MIN, V
IL
= 0.8 V,
05
08
05
07
V
CC
I
OL
= 300 mA
IL
0
.
5
0
.
8
0
.
5
0
.
7
I
OH
High level out
p
ut current
V
CC
= MIN, V
IH
= MIN,
300
100
µA
I
OH
High
-
le
v
el
o
u
tp
u
t
c
u
rrent
CC
V
OH
= 30 V
IH
300
100
µ
A
I
I
Input current at maximum input voltage V
CC
= MAX, V
I
= 5.5 V 1 1 mA
I
IH
High-level input current V
CC
= MAX, V
I
= 2.4 V 40 40 µA
I
IL
Low-level input current V
CC
= MAX, V
I
= 0.4 V –1 –1.6 –1 –1.6 mA
I
CCH
Supply current, outputs high V
CC
= MAX, V
I
= 5 V 7 11 7 11 mA
I
CCL
Supply current, outputs low V
CC
= MAX, V
I
= 0 52 65 52 65 mA
‡
For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions.
§
All typical values are at V
CC
= 5 V, T
A
= 25°C.
switching characteristics, V
CC
= 5 V, T
A
= 25°C
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
t
PLH
Propagation delay time, low-to-high-level output 18 25
t
PHL
Propagation delay time, high-to-low-level output
I
O
≈ 200 mA, C
L
= 15 pF,
18 25
ns
t
TLH
Transition time, low-to-high-level output
O
R
L
= 50 Ω,
L
See Figure 1
5 8
ns
t
THL
Transition time, high-to-low-level output 7 12
V
OH
High level out
p
ut voltage after switching
SN55451B
V
S
= 20 V, I
O
≈ 300 mA,
V
S
–6.5
mV
V
OH
High
-
le
v
el
o
u
tp
u
t
v
oltage
after
s
w
itching
SN75451B
S
,
See Figure 2
O
,
V
S
–6.5
mV
V
CC
A
GND
Y
500 Ω
1 kΩ
B
4 kΩ 1.6 kΩ 130 Ω
Resistor values shown are nominal.
schematic (each driver)