Electrical Characteristics
(Notes 2, 3)
Symbol
V
OH
V
OL
Parameter
High Level Output Voltage
Low Level Output Voltage
(Continued)
Over recommended operating conditions, SD = 0.8V, unless otherwise specified.
Conditions
V
IN
= −3V, I
OH
= −2.0 mA
V
IN
= −3V, I
OH
= −20 µA
V
IN
= +3V, I
OL
= +2.0 mA
Min
3.8
4.0
0.23
0.4
Typ
Max
Units
V
V
V
RECEIVER CHARACTERISTICS
(Note 4)
Switching Characteristics
(Note 4)
Over recommended operating conditions, SD = 0.8V, unless otherwise specified.
Symbol
t
PLH
t
PHL
t
SK
SR1
SR2
t
PLS
t
PSL
t
PHS
t
PSH
t
PLH
t
PHL
t
SK
t
PLS
t
PSL
t
PHS
t
PSH
Parameter
Propagation Delay LOW to HIGH
Propagation Delay HIGH to LOW
Skew |t
PLH
–t
PHL
|
Output Slew Rate
Output Slew Rate
Propagation Delay LOW to SD
Propagation Delay SD to LOW
Propagation Delay HIGH to SD
Propagation Delay SD to HIGH
Propagation Delay LOW to HIGH
Propagation Delay HIGH to LOW
Skew |t
PLH
–t
PHL
|
Propagation Delay LOW to SD
Propagation Delay SD to LOW
Propagation Delay HIGH to SD
Propagation Delay SD to HIGH
(Figures
7, 8)
R
L
= 1 kΩ
C
L
= 50 pF
R1–R4 Only
C
L
= 50 pF
(Figures
3, 4)
0.1
0.1
R
L
= 3 kΩ
C
L
= 50 pF
(Figures
1, 2)
R
L
= 3 kΩ to 7 kΩ, C
L
= 50 pF (Figure
2)
R
L
= 3 kΩ, C
L
= 2500 pF (Figure
2)
(Figures
5, 6)
R
L
= 3 kΩ
C
L
= 50 pF
Conditions
Min
0.1
0.1
4
4
Typ
0.6
0.6
0
13
10
0.48
1.88
0.62
1.03
0.4
0.6
0.1
0.13
1.0
0.19
0.58
1.0
1.0
0.5
Max
1.0
1.0
0.2
30
30
Units
µs
µs
µs
V/µs
V/µs
ms
ms
ms
ms
µs
µs
µs
µs
µs
µs
µs
DRIVER CHARACTERISTICS
RECEIVER CHARACTERISTICS
Note 1:
“Absolute Maximum Ratings” are those values beyond which the safety of the device cannot be guaranteed. They are not meant to imply that the devices
should be operated at these limits. The tables of “Electrical Characteristics” specify conditions for device operation.
Note 2:
Typical values are given for V
CC
= 5V and T
A
= +25˚C.
Note 3:
Current into device pins is defined as positive. Current out of device pins is defined as negative. All voltages are referenced to ground unless otherwise speci-
fied. For voltage logic levels, the more positive value is designated as maximum. For example, if −5V is a maximum, the typical value (−6.7V) is more negative.
Note 4:
Receiver characteristics are guaranteed for SD = 0.8V. When SD = 2.0V, receiver five (R5) is active and meets receiver parameters in SHUTDOWN (SD)
mode, unless otherwise specified.
Note 5:
Generator characteristics for driver input: f = 64 kHz (128 kbits/sec), t
r
= t
f
<
10 ns, V
IH
= 3V, V
IL
= 0V, duty cycle = 50%.
Note 6:
Generator characteristics for receiver input: f = 64 kHz (128 kbits/sec), t
r
= t
f
<
10 ns, V
IH
= 3V, V
IL
= −3V, duty cycle = 50%.
Note 7:
Only one driver output shorted at a time.
Parameter Measurement Information
DS011910-3
FIGURE 1. Driver Propagation Delay and Slew Rate Test Circuit
3
www.national.com
NSC [ NATIONAL SEMICONDUCTOR ]
