MAX3387E_10 datasheet(3/14 Pages) MAXIM

Part #	MAX3387E

Description	3V, ±15kV ESD-Protected, AutoShutdown Plus RS-232 Transceiver for PDAs and Cell Phones

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Manufacturer	MAXIM [Maxim Integrated Products]

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3V, ±15kV ESD-Protected, AutoShutdown Plus

RS-232 Transceiver for PDAs and Cell Phones

_______________________________________________________________________________________

3

DC ELECTRICAL CHARACTERISTICS (continued)

(VCC = VL = +3.0V to +5.5V; C1–C4 = 0.1µF, tested at +3.3V ±10%; C1 = 0.047µF, C2–C4 = 0.33µF, tested at +5.0V ±10%;

TA = TMIN to TMAX, unless otherwise noted. Typical values are at VCC = VL = +3.3V, TA = +25°C.)

AutoShutdown Plus (FORCEON = GND, FORCEOFF = VCC)

ESD PROTECTION

TRANSMITTER OUTPUTS

-2.7

Negative threshold

Figure 3a

Positive threshold

Receiver or Transmitter Edge to

Transmitters Shutdown

tAUTOSHDN

15

30

60

s

Receiver Positive or Negative

Threshold to INVALID Low

tINVL

30

VCC = +5V, Figure 3b

Receiver or Transmitter Edge to

Transmitters Enabled

tWU

100

µs

VCC = +5V, Figure 3b

µs

VCC = +5V, Figure 3b

Receiver Positive or Negative

Threshold to INVALID High

tINVH

1

µs

INVALID Output Voltage Low

0.4

VCC = +5V, Figure 3b

INVALID Output Voltage High

VL - 0.6

V

IOUT = -1.6mA

V

IOUT = -1.0mA

Receiver Input Threshold to

INVALID Output Low

-0.3

0.3

V

Receiver Input Threshold to

INVALID Output High

2.7

V

Figure 3a

R_IN, T_OUT

ESD Protection

±8

kV

IEC 1000-4-2 Contact Discharge method

PARAMETER

SYMBOL

MIN

TYP

MAX

UNITS

Input Hysteresis

0.5

V

Input Resistance

35

7

k

Ω

Output Voltage Swing

±5

±5.4

V

Output Resistance

300

10M

Ω

Output Short-Circuit Current

±60

mA

Output Leakage Current

±25

µA

±15

CONDITIONS

TA = +25°C

All transmitter outputs loaded with 3k

Ω to

ground

VCC = V+ = V- = 0V, transmitter output = ±2V

VT_OUT = 0V

VT_OUT = ±12V, transmitters disabled;

VCC = 0V or +3.0V to +5.5V

Human Body Model

IEC 1000-4-2 Air-Gap Discharge method

TRANSMITTER OUTPUTS

ESD PROTECTION

AutoShutdown Plus (FORCEON = GND, FORCEOFF = VCC)

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