MAX3224 Просмотр технического описания (PDF) - Maxim Integrated

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MAX3224

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

Maxim Integrated 

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

RS-232 Transceivers with AutoShutdown Plus

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.)

PARAMETER

SYMBOL

CONDITIONS

MIN TYP MAX UNITS

Maximum Data Rate

RL = 3kΩ, CL = 1000pF,

one transmitter switching

250

kbps

Receiver Propagation Delay

tPHL

tPLH

R_IN to R_OUT, CL = 150pF

Receiver Output Enable Time

Normal operation (MAX3244 only)

0.15

µs

0.15

200

ns

Receiver Output Disable Time

Normal operation (MAX3244 only)

200

ns

Transmitter Skew

Receiver Skew

⏐ tPHL - tPLH ⏐ (Note 3)

⏐ tPHL - tPLH ⏐

100

ns

50

ns

Transition-Region Slew Rate

VCC = 3.3V, TA = +25°C,

RL = 3kΩ to 7kΩ,

CL = 150pF

to 1000pF

6

measured from +3V to -3V CL = 150pF

or -3V to +3V

to 2500pF

4

30

V/µs

30

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.)

PARAMETER

SYMBOL

CONDITIONS

MIN TYP MAX UNITS

RL = 3kΩ, CL = 1000pF,

one transmitter switching

250

Maximum Data Rate

VCC = 3.0V to 4.5V, RL = 3kΩ,

CL = 250pF, one transmitter switching

1000

kbps

VCC = 4.5V to 5.5V, RL = 3kΩ,

CL = 1000pF, one transmitter switching

1000

Receiver Propagation Delay

tPHL

tPLH

R_IN to R_OUT, CL = 150pF

0.15

µs

0.15

Receiver Output Enable Time

Normal operation (MAX3245 only)

200

ns

Receiver Output Disable Time

Normal operation (MAX3245 only)

200

ns

Transmitter Skew

Receiver Skew

⏐ tPHL - tPLH ⏐ (Note 3)

⏐ tPHL - tPLH ⏐

25

ns

50

ns

Transition-Region Slew Rate

VCC = 3.3V, TA = +25°C,

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

24

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

150 V/µs

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.

4 _______________________________________________________________________________________

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