SN65C3243PW datasheet(10/21 Pages) TI1

Part #	SN65C3243PW

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

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Manufacturer	TI1 [Texas Instruments]

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50% VCC

TEST CIRCUIT

VOLTAGE WAVEFORMS

50

Ω

3 V

2.7 V

−2.7 V

INVALID

Output

Receiver

Input

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

−2.7 V

0.3 V

−0.3 V

0 V

Valid RS-232 Level, INVALID High

Indeterminate

If Signal Remains Within This Region

for More Than 30

µs, INVALID Is Low†

Valid RS-232 Level, INVALID High

† Auto-powerdowndisables drivers and reduces supply

current to 1

µA.

≈V+

0 V

≈V−

V+

VCC

ten

V−

NOTES: A. CL includes probe and jig capacitance.

B. The pulse generator has the following characteristics: PRR = 5 kbit/s, ZO = 50 Ω, 50% duty cycle, tr ≤ 10 ns, tf ≤ 10 ns.

50% VCC

2.7 V

−2.7 V

0.3 V

tinvalid

Supply

Voltages

SN65C3243

, SN75C3243

SLLS353H – JUNE 1999 – REVISED SEPTEMBER 2008 ................................................................................................................................................. www.ti.com

PARAMETER MEASUREMENT INFORMATION (continued)

Figure 5. INVALID Propagation Delay Times and Supply Enabling Time

10

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Product Folder Link(s): SN65C3243 SN75C3243

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