DS89C21 Datasheet, PDF (3/6 Pages) National Semiconductor (TI) – Differential CMOS Line Driver and Receiver Pair

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
DI = 2.4V or 0.5V
3.0
6
mA
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
t_PHLD
Propagation Delay HIGH to LOW
t_SKD
Skew, |t_PLHD–t _PHLD|
t_TLH
Transition Time LOW to HIGH
t_THL
Transition Time HIGH to LOW
RECEIVER CHARACTERISTICS
t_PLH
Propagation Delay LOW to HIGH
t_PHL
Propagation Delay HIGH to LOW
t_SK
Skew, |t_PLH–t _PHL|
t_r
Rise Time
t_f
Fall Time
R_L = 100Ω
C_L = 50 pF
C_L = 50 pF
V_DIFF = 2.5V
V_CM = 0V
(Figures 2, 3)
(Figures 2, 4)
(Figures 5, 6)
(Figure 7)
2
4.9
10
ns
2
4.5
10
ns
0.4
2.0
ns
2.2
9
ns
2.1
9
ns
6
18
30
ns
6 17.5 30
ns
0.5
4.0
ns
2.5
9
ns
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 V_CC = 5.0V and T _A = 25˚C.
Note 4: f = 1 MHz, t_r and t_f ≤ 6 ns.
Note 5: ESD Rating: HBM (1.5 kΩ, 100 pF) all pins ≥ 2000V.
EIAJ (0Ω, 200 pF) ≥ 250V
Parameter Measurement Information
FIGURE 1. V_OD and V_OC Test Circuit
DS011753-2
3
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