LMS1485 datasheet(4/10 Pages) NSC

4 / 10 page

Electrical Characteristics (Continued)

Over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted)

Symbol

Parameter

Conditions

Min

Typ

Max

Units

CMOS High-Level Output

Voltage

OH = −4mA

OSR

Short-Circuit Output Current

O = GND or VCC

785

Tristate Output Leakage

Current

0.4V

≤V

≤+2.4V

−1

µA

Power Supply Current

Supply Current

Driver Enabled, Output = No Load,

Digital Inputs = GND or V

1.1

2.2

Driver Disabled, Output = No Load,

Digital Inputs = GND or V

2.2

Switching Characteristics

Driver

PLH,

PHL

Propagation Delay Input to

Output

L =54

Ω,C

L = 100pF

(Figure 3, Figure 7)

SKEW

Driver Output Skew

L =54

Ω,C

L = 100pF

(Figure 3, Figure 7)

1ns

Driver Rise and Fall Time

L = 100

Ω,C

L = 100pF

(Figure 3, Figure 7)

510

ENABLE

Driver Enable to Ouput Valid

Time

(Figure 4, Figure 8)18

DISABLE

Output Disable Time

(Figure 4, Figure 8)20

Receiver

PLH,

PHL

Propagation Delay Input to

Output

L = 15pF

(Figure 5, Figure 7)

SKEW

Receiver Output Skew

(Figure 5, Figure 7)2

ENABLE

Receiver Enable Time

(Figure 6, Figure 10)

DISABLE

Receiver Disable Time

(Figure 6, Figure 10)15

Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is

intended to be functional, but specific performance is not guaranteed. For guaranteed specifications and the test conditions, see the Electrical Characteristics

Note 2: All voltage values, except differential I/O bus voltage, are with respect to network ground terminal.

Note 3: The maximum power dissipation is a function of TJ(MAX), θJA, and TA. The maximum allowable power dissipation at any ambient temperature is PD =

(TJ(MAX) -TA)/θJA. All numbers apply for packages soldered directly into a PC board.

Note 4: ESD rating based upon human body model, 100pF discharged through 1.5k

Ω.

Note 5: Voltage limits apply to DI, DE, RE pins.

Note 6: Differential input/output bus voltage is measured at the non-inverting terminal A with respect to the inverting terminal B.

Note 7: |

∆VOD| and |∆VOC| are changes in magnitude of VOD and VOC, respectively when the input changes from high to low levels.

Note 8: ESD rating applies to pins 6 and 7

Note 9: ESD rating applies to pins 1, 2, 3, 4, 5 and 8

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