UM3243EESS datasheet(12/22 Pages) UNIONSEMI

12 / 22 page

http://www.union-ic.com Rev.01 Mar.2015

12/22

UM3243

Parameter Measurement Information

Input

Output

tTHL

tTLH

-3V

VOH

VOL

VOLTAGE WAVEFORMS

Generator

(see Note B)

FORCEOFF

(see Note A)

RS-232

Output

TEST CIRCUIT

TLH

THL

)

(



NOTES: A. CL includes probe and jig capacitance.

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

Figure 2. Transmitter Slew Rate

Generator

(see Note B)

FORCEOFF

(see Note A)

RS-232

Output

TEST CIRCUIT

Input

Output

tPHL

tPLH

50%

VOH

VOL

VOLTAGE WAVEFORMS

1.5V

50%

1.5V

NOTES: A. CL includes probe and jig capacitance.

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

Figure 3. Transmitter Pulse Skew

Generator

(see Note B)

FORCEOFF

(see Note A)

Output

TEST CIRCUIT

3V or 0V

FORCEON

Input

Output

tPHL

-3V

tPLH

50%

VOH

VOL

VOLTAGE WAVEFORMS

1.5V

50%

1.5V

NOTES: A. CL includes probe and jig capacitance.

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

Figure 4. Receiver Propagation Delay Times

Generator

(see Note B)

3V or 0V

FORCEOFF

(see Note A)

TEST CIRCUIT

3V or 0V

FORCEON

Output

GND

VCC

Input

1.5V

-3V

tPHZ

(S1 at GND)

tPZH

(S1 at GND)

VOH

Output

0.3V

tPLZ

(S1 at VCC)

tPZL

(S1 at VCC)

50%

VOL

0.3V

Output

VOLTAGE WAVEFORMS

NOTES: A. CL includes probe and jig capacitance.

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

C. tPLZ and tPHZ are the same as tdis.

D. tPZL and tPZH are the same as ten.

Figure 5. Receiver Enable and Disable Times

UM3243EESS Datasheet(PDF) 12 Page - Union Semiconductor, Inc.

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