LMS485IM datasheet(5/13 Pages) NSC

5 / 13 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, VID = 200mV

3.5

CMOS Low-level

OL = 4mA, VID = −200mV

0.40

OZR

Tristate Output Leakage

Current

0.4V

≤ V

≤ + 2.4V

±1µA

Input Resistance

− 7V

≤ V

≤+12V

Ω

Power Supply Current

Supply Current

DE = V

CC, RE = GND or VCC

320

500

µA

DE = 0V, RE = GND or V

315

400

OSD1

Driver Short-circuit Output

Current

O = high, −7V

≤ V

≤ + 12V

(Note 8)

250

OSD2

Driver Short-circuit Output

Current

O = low, − 7V

≤V

≤ + 12V

(Note 8)

250

OSR

Receiver Short-circuit Output

Current

≤V

≤ V

795

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 = 100 pF

(Figure 3, Figure 7)

510

Driver Rise and Fall Time

L =54

Ω,C

L = 100 pF

(Figure 3, Figure 7)

ZH,

Driver Enable to Ouput Valid

Time

L = 100 pF, RL = 500

Ω

(Figure 4, Figure 8)

HZ,

Driver Output Disable Time

L = 15 pF, RL = 500

Ω

(Figure 4, Figure 8)

Receiver

PLH,

PHL

Propagation Delay Input to

Output

L =54

Ω,C

L = 100 pF

(Figure 5, Figure 7)

200

SKEW

Receiver Output Skew

L =54

Ω,C

L = 100 pF

(Figure 5, Figure 7)

5nS

ZH,

Receiver Enable Time

L = 15 pF, RL =1 k

Ω

(Figure 6, Figure 10)

Receiver Disable Time

MAX

Maximum Data Rate

2.5

Mbps

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: Peak current

LMS485IM 데이터시트(PDF) 5 Page - National Semiconductor (TI)

LMS485IM 데이터시트(HTML) 5 Page - National Semiconductor (TI)

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13

데이터시트 다운로드

링크 URL