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DS89C21 Fiches technique(PDF) 3 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor. Click here to check the latest version.
No de pièce DS89C21
Description  Differential CMOS Line Driver and Receiver Pair
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Fabricant  NSC [National Semiconductor (TI)]
Site Internet  http://www.national.com
Logo NSC - National Semiconductor (TI)

DS89C21 Fiches technique(HTML) 3 Page - National Semiconductor (TI)

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Electrical Characteristics (Notes 2, 3) (Continued)
Over recommended supply voltage and operating temperature ranges, unless otherwise specified.
Symbol
Parameter
Conditions
Pin
Min
Typ
Max
Units
DRIVER AND RECEIVER CHARACTERISTICS
I
CC
Supply Current
No Load
DI = V
CC or GND
V
CC
3.0
6
mA
DI = 2.4V or 0.5V
3.8
12
mA
Switching Characteristics (Note 3)
Over recommended supply voltage and operating temperature ranges, unless otherwise specified.
Symbol
Parameter
Conditions
Min
Typ
Max
Units
DIFFERENTIAL DRIVER CHARACTERISTICS
t
PLHD
Propagation Delay LOW to HIGH
R
L = 100Ω
(
Figures 2, 3)
2
4.9
10
ns
t
PHLD
Propagation Delay HIGH to LOW
C
L = 50 pF
2
4.5
10
ns
t
SKD
Skew, |t
PLHD–t PHLD|
0.4
2.0
ns
t
TLH
Transition Time LOW to HIGH
(
Figures 2, 4)
2.2
9
ns
t
THL
Transition Time HIGH to LOW
2.1
9
ns
RECEIVER CHARACTERISTICS
t
PLH
Propagation Delay LOW to HIGH
C
L = 50 pF
(
Figures 5, 6)
6
18
30
ns
t
PHL
Propagation Delay HIGH to LOW
V
DIFF = 2.5V
6
17.5
30
ns
t
SK
Skew, |t
PLH–t PHL|VCM = 0V
0.5
4.0
ns
t
r
Rise Time
(
Figure 7)
2.5
9
ns
t
f
Fall Time
2.1
9
ns
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: 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
specified.
Note 3: All typicals are given for VCC = 5.0V and T A = 25˚C.
Note 4: f = 1 MHz, tr and tf ≤ 6 ns.
Note 5: ESD Rating: HBM (1.5 k
Ω, 100 pF) all pins ≥ 2000V.
EIAJ (0
Ω, 200 pF) ≥ 250V
Parameter Measurement Information
DS011753-2
FIGURE 1. V
OD and VOC Test Circuit
www.national.com
3


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