MAX3244 datasheet(4/20 Pages) MAXIM

Part #	MAX3244

Description	1uA Supply Current, 1Mbps, 3.0V to 5.5V, RS-232 Transceivers with AutoShutdown Plus

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Manufacturer	MAXIM [Maxim Integrated Products]

Direct Link	https://www.maximintegrated.com/en.html

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1µA Supply Current, 1Mbps, 3.0V to 5.5V,

RS-232 Transceivers with AutoShutdown Plus

4

_______________________________________________________________________________________

TIMING CHARACTERISTICS—MAX3224/MAX3226/MAX3244

(VCC = +3V to +5.5V, C1–C4 = 0.1µF, tested at 3.3V ±10%; CL = 0.047µF, C2–C4 = 0.33µF, tested at 5.0V ±10%; TA = TMIN to TMAX,

unless otherwise noted. Typical values are at TA = +25°C.)

TIMING CHARACTERISTICS—MAX3225/MAX3227/MAX3245

(VCC = +3V to +5.5V, C1–C4 = 0.1µF, tested at 3.3V ±10%; CL = 0.047µF, C2–C4 = 0.33µF, tested at 5.0V ±10%; TA = TMIN to TMAX,

unless otherwise noted. Typical values are at TA = +25°C.)

Note 2: A transmitter/receiver edge is defined as a transition through the transmitter/receiver input logic thresholds.

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

CL = 150pF

to 2500pF

CL = 150pF

to 1000pF

R_IN to R_OUT, CL = 150pF

RL = 3kΩ, CL = 1000pF,

one transmitter switching

VCC = 3.3V, TA = +25°C,

RL = 3kΩ to 7kΩ,

measured from +3V to -3V

or -3V to +3V

Normal operation (MAX3244 only)

(Note 3)

CONDITIONS

0.15

tPLH

µs

0.15

tPHL

kbps

250

Maximum Data Rate

Receiver Propagation Delay

V/µs

4

30

6

30

Transition-Region Slew Rate

ns

200

Receiver Output Enable Time

ns

200

Receiver Output Disable Time

ns

100

 tPHL - tPLH 

Transmitter Skew

ns

50

 tPHL - tPLH 

Receiver Skew

UNITS

MIN

TYP

MAX

SYMBOL

PARAMETER

VCC = 4.5V to 5.5V, RL = 3kΩ,

CL = 1000pF, one transmitter switching

VCC = 3.0V to 4.5V, RL = 3kΩ,

CL = 250pF, one transmitter switching

RL = 3kΩ, CL = 1000pF,

one transmitter switching

VCC = 3.3V, TA = +25°C,

RL = 3kΩ to 7kΩ, CL = 150pF to 1000pF,

measured from +3V to -3V or -3V to +3V

(Note 3)

R_IN to R_OUT, CL = 150pF

Normal operation (MAX3245 only)

CONDITIONS

1000

kbps

250

Maximum Data Rate

V/µs

24

150

Transition-Region Slew Rate

ns

50

 tPHL - tPLH 

Receiver Skew

ns

25

 tPHL - tPLH 

Transmitter Skew

µs

0.15

tPHL

Receiver Propagation Delay

0.15

tPLH

ns

200

Receiver Output Enable Time

ns

200

Receiver Output Disable Time

UNITS

MIN

TYP

MAX

SYMBOL

PARAMETER

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