DS14C535 Datasheet, PDF (3/8 Pages) National Semiconductor (TI) – +5V Supply EIA/TIA-232 3 x 5 Driver/Receiver

Electrical Characteristics (Notes 2, 3) (Continued)
Over recommended operating conditions, SD = 0.8V, unless otherwise specified.
Symbol
Parameter
Conditions
RECEIVER CHARACTERISTICS (Note 4)
V_OH
High Level Output Voltage
V_OL
Low Level Output Voltage
V_IN = −3V, I_OH = −2.0 mA
V_IN = −3V, I_OH = −20 µA
V_IN = +3V, I_OL = +2.0 mA
Min
Typ
Max Units
3.8
V
4.0
V
0.23
0.4
V
Switching Characteristics (Note 4)
Over recommended operating conditions, SD = 0.8V, unless otherwise specified.
Symbol
Parameter
Conditions
Min Typ Max Units
DRIVER CHARACTERISTICS
t_PLH
t_PHL
t_SK
SR1
Propagation Delay LOW to HIGH
Propagation Delay HIGH to LOW
Skew |t_PLH–t_PHL|
Output Slew Rate
SR2
Output Slew Rate
t_PLS
Propagation Delay LOW to SD
t_PSL
Propagation Delay SD to LOW
t_PHS
Propagation Delay HIGH to SD
t_PSH
Propagation Delay SD to HIGH
RECEIVER CHARACTERISTICS
t_PLH
t_PHL
t_SK
t_PLS
t_PSL
t_PHS
t_PSH
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
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
0.1 0.6 1.0
0.1 0.6 1.0
0
0.2
4
13
30
4
10
30
0.48
1.88
0.62
1.03
µs
µs
µs
V/µs
V/µs
ms
ms
ms
ms
C_L = 50 pF
(Figures 3, 4)
(Figures 7, 8)
R_L = 1 kΩ
C_L = 50 pF
R1–R4 Only
0.1 0.4 1.0
µs
0.1 0.6 1.0
µs
0.1 0.5
µs
0.13
µs
1.0
µs
0.19
µs
0.58
µs
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