MAX3243EETJ Просмотр технического описания (PDF) - Maxim Integrated

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MAX3243EETJ

±15kV ESD-Protected, 1µA, 3.0V to 5.5V, 250kbps, RS-232 Transceivers with AutoShutdown

Maxim Integrated 

MAX3221E/MAX3223E/MAX3243E

±15kV ESD-Protected, 1µA, 3.0V to 5.5V, 250kbps,

RS-232 Transceivers with AutoShutdown

TIMING CHARACTERISTICS—MAX3221E/MAX3223E/MAX3243E

(VCC = +3.0V to +5.5V, C1–C4 = 0.1µF (Note 2), TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX UNITS

Maximum Data Rate

RL = 3kΩ, CL = 1000pF,

one transmitter switching

250

kbps

Receiver Propagation Delay

tPHL

tPLH

CL = 150pF

Receiver Output Enable Time

Normal operation

0.15

µs

0.15

200

ns

Receiver Output Disable Time

Normal operation

200

ns

Transmitter Skew

Receiver Skew

⏐ tPHL - tPLH ⏐ (Note 3)

⏐ tPHL - tPLH ⏐

100

ns

50

ns

Transition-Region Slew Rate

VCC = 3.3V,

RL = 3kΩ to 7kΩ,

TA = +25°C,

measured from +3V

to -3V or

CL = 150pF to

1000pF

6

-3V to +3V, one

transmitter switching

30

V/µs

Note 2: C1–C4 = 0.1µF, tested at 3.3V ±10%. C1 = 0.047µF, C2–C4 = 0.33µF, tested at 5.0V ±10%.

Note 3: Transmitter skew is measured at the transmitter zero cross points.

Typical Operating Characteristics

(VCC = +3.3V, 250kbps data rate, 0.1µF capacitors, all transmitters loaded with 3kΩ and CL, TA = +25°C, unless otherwise noted.)

MAX3221E/MAX3223E

TRANSMITTER OUTPUT VOLTAGE

vs. LOAD CAPACITANCE

6

5

4

VOUT+

3

2

T1 TRANSMITTING AT 250kbps

1

T2 (MAX3223E) TRANSMITTING AT 15.6kbps

0

-1

-2

-3

-4

-5

VOUT-

-6

0

1000 2000 3000 4000 5000

LOAD CAPACITANCE (pF)

MAX3221E/MAX3223E

SLEW RATE vs. LOAD CAPACITANCE

16

14

12

-SLEW

10

+SLEW

8

6

4

2

FOR DATA RATES UP TO 250kbps

0

0 1000 2000 3000 4000 5000

LOAD CAPACITANCE (pF)

4

Maxim Integrated

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