MAX3223E datasheet(10/18 Pages) TI

Part #	MAX3223E

Description	3-V TO 5.5-V MULTICHANNEL RS-232 LINE DRIVER/RECEIVER WITH 짹15-kV ESD PROTECTION

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Manufacturer	TI [Texas Instruments]

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TEST CIRCUIT

VOLTAGE WAVEFORMS

50

Ω

3 V

2.7 V

INVALID

Output

Receiver

Input

tinvalid

Generator

(see Note B)

FORCEOFF

tvalid

ROUT

FORCEON

Auto-

powerdown

INVALID

DOUT

0 V

−3 V

DIN

CL = 30 pF

(see Note A)

VCC

0 V

2.7 V

0.3 V

0 V

Indeterminate

If Signal Remains Within This Region

for More Than 30 ms, INVALID Is Low†

≈V+

0 V

≈V−

V+

VCC

ten

V−

50% VCC

2.7 V

−2.7 V

0.3 V

Supply

Voltages

† Auto-powerdown

disables

drivers

and

reduces supply current to 1

µA

Valid RS-232 Level, INVALID High

EN

MAX3223E

3-V TO 5.5-V MULTICHANNEL RS-232 LINE DRIVER/RECEIVER

WITH

±15-kV ESD PROTECTION

SLLS707 – JANUARY 2006

PARAMETER MEASUREMENT INFORMATION (continued)

A.

CL includes probe and jig capacitance.

B.

The pulse generator has the following characteristics: PRR = 250 kbit/s, ZO = 50 Ω, 50% duty cycle, tr ≤ 10 ns,

tf ≤ 10 ns.

Figure 5. INVALID Propagation Delay Times and Supply Enabling Time

10

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