SP3239E 查看數據表（PDF） - Exar Corporation

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SP3239E

Intelligent +3.0V to +5.5V RS-232 Transceiver

Exar Corporation 

ELECTRICAL CHARACTERISTICS

VCC = +3.0V to +5.5V, C1 - C4 = 0.1µF (tested at 3.3V +/-5%), C1 - C4 = 0.22µF (tested at 3.3V +/-10%),

C1 = 0.047µF and C2 - C4 = 0.33µF (tested at 5.0V +/-10%), TAMB = TMIN to TMAX, unless otherwise noted. Typical

values are at TA = 25°C

PARAMETER

MIN. TYP. MAX. UNITS CONDITIONS

DRIVER OUTPUTS (continued)

Output Resistance

Output Short-Circuit Current

RECEIVER INPUTS

Input Voltage Range

Input Threshold LOW

Input Threshold LOW

Input Threshold HIGH

Input Threshold HIGH

Input Hysteresis

Input Resistance

TIMING CHARACTERISTICS

Maximum Data Rate

Receiver Propagation Delay

tPHL

tPLH

Receiver Output Enable Time

Receiver Output Disable Time

Driver Skew

Receiver Skew

Transition-Region Slew Rate

300

Ω VCC = V+ = V- = 0V, VOUT=+2V

+35 +60

mA VOUT = GND

-25

25

V

0.6

1.2

V Vcc = 3.3V

0.8

1.5

V Vcc = 5.0V

1.5 2.4

V Vcc = 3.3V

1.8 2.4

V Vcc = 5.0V

0.5

V

3

5

7

kΩ

250

kbps RL = 3KΩ, CL = 1000pF, one

driver switching

0.15

0.15

200

200

100

50

30

µs

ns

ns

ns

ns

V/µs

Receiver input to Receiver

output, CL = 150pF

Normal operation

Normal operation

| tPHL - tPLH |, TAMB = 25°C

| tPHL - tPLH |

Vcc = 3.3V, RL = 3kΩ, TAMB =

25°C, measurements taken from

-3.0V to +3.0V or +3.0V to -3.0V

Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 510-668-7017 • www.exar.com



SP3249E_100_013111

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