MAX3222CUP datasheet(5/16 Pages) MAXIM

Part #	MAX3222CUP

Description	3.0V to 5.5V, Low-Power, up to 1Mbps, True RS-232 Transceivers Using Four 0.1uF External Capacitors

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Manufacturer	MAXIM [Maxim Integrated Products]

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3.0V to 5.5V, Low-Power, up to 1Mbps, True RS-232

Transceivers Using Four 0.1µF External Capacitors

_______________________________________________________________________________________

5

-7.5

-5.0

-2.5

0

2.5

5.0

7.5

0

MAX3241

TRANSMITTER OUTPUT VOLTAGE

vs. LOAD CAPACITANCE

LOAD CAPACITANCE (pF)

2000

3000

1000

4000

5000

VOUT+

1 TRANSMITTER AT 235kbps

2 TRANSMITTERS AT 30kbps

VOUT-

ALL OUTPUTS LOADED WITH 3k

Ω +CL

0.1

µF CHARGE-PUMP CAPACITORS

FOR ALL DATA RATES UP TO 235kbps

4

6

8

10

12

14

16

18

20

22

24

0

MAX3241

SLEW RATE

vs. LOAD CAPACITANCE

LOAD CAPACITANCE (pF)

2000

3000

1000

4000

5000

+SLEW

-SLEW

0

5

10

15

20

25

30

35

45

40

0

MAX3241

SUPPLY CURRENT vs. LOAD

CAPACITANCE WHEN TRANSMITTING DATA

LOAD CAPACITANCE (pF)

2000

3000

1000

4000

5000

235kbps

120kbps

20kbps

-7.5

-5.0

-2.5

0

2.5

5.0

7.5

0

MAX3237

TRANSMITTER OUTPUT VOLTAGE

vs. LOAD CAPACITANCE (MBAUD = GND)

LOAD CAPACITANCE (pF)

2000

3000

1000

4000

5000

1 TRANSMITTER AT 240kbps

4 TRANSMITTERS AT 15kbps

3k

Ω + CL LOADS

VCC = 3.3V

0

10

20

30

50

40

60

70

0

MAX3237

SLEW RATE vs. LOAD CAPACITANCE

(MBAUD = VCC)

LOAD CAPACITANCE (pF)

500

1000

1500

2000

-SLEW, 1Mbps

+SLEW, 1Mbps

1 TRANSMITTER AT FULL DATA RATE

4 TRANSMITTERS AT 1/16 DATA RATE

3k

Ω + CL LOAD EACH OUTPUT

VCC = 3.3V

-SLEW, 2Mbps

+SLEW, 2Mbps

-7.5

-5.0

-2.5

0

2.5

5.0

7.5

0

MAX3237

TRANSMITTER OUTPUT VOLTAGE

vs. LOAD CAPACITANCE (MBAUD = VCC)

LOAD CAPACITANCE (pF)

500

1000

1500

2000

1 TRANSMITTER AT FULL DATA RATE

4 TRANSMITTERS AT 1/16 DATA RATE

3k

Ω + CL LOAD, EACH OUTPUT

VCC = 3.3V

2Mbps

1.5Mbps

1Mbps

2Mbps

1Mbps

1.5Mbps

0

10

20

30

40

50

60

0

MAX3237

SUPPLY CURRENT vs.

LOAD CAPACITANCE (MBAUD = GND)

LOAD CAPACITANCE (pF)

2000

3000

1000

4000

5000

240kbps

120kbps

20kbps

1 TRANSMITTER AT FULL DATA RATE

4 TRANSMITTERS AT 1/16 DATA RATE

3k

Ω + CL LOADS

VCC = 3.3V

0

2

4

6

8

10

12

0

MAX3237

SLEW RATE vs. LOAD CAPACITANCE

(MBAUD = GND)

LOAD CAPACITANCE (pF)

2000

3000

1000

4000

5000

+SLEW

-SLEW

1 TRANSMITTER AT 240kbps

4 TRANSMITTERS AT 15kbps

3k

Ω + CL LOADS

VCC = 3.3V

0

10

30

20

40

50

60

70

0

MAX3237

SKEW vs. LOAD CAPACITANCE

(tPLH - tPHL)

LOAD CAPACITANCE (pF)

1000

1500

500

2000

2500

MAX

MIN

AVERAGE; 10 PARTS

1 TRANSMITTER AT 512kbps

4 TRANSMITTERS AT 32kbps

3k

Ω + CL LOADS

VCC = 3.3V

MBAUD = VCC

_____________________________Typical Operating Characteristics (continued)

(VCC = +3.3V, 235kbps data rate, 0.1µF capacitors, all transmitters loaded with 3kΩ, TA = +25°C, unless otherwise noted.)

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