R31DS0210EU0106 Rev.1.06

Page 22

May 11, 2026

RC193xx Datasheet

Table 17. 85 ohm CLK AC/DC Characteristics – Source-Terminated, Non-PCIe Applications[1]

1. Standard high impedance load with CL = 2pF. See Test Loads.

Symbol

Parameter

Conditions

Minimum

Typical

Maximum Unit

VOH

Output High Voltage [2]

2. Measured from single-ended waveform.

VHIGH = 800mV, Fast Slew Rate,

156.25MHz, 312.5MHz.

(Slow slew rate is not recommended for

frequencies > 100MHz)

645

812

989

mV

VOL

Output Low Voltage [2]

-220

-41

39

VCROSS Crossing Voltage (abs) [3]

3. Measured at crossing point where the instantaneous voltage value of the rising edge of CLK equals the falling edge of CLKb.

275

376

471

ΔVCROSS Crossing Voltage (var) [3][4][5]

4. Refers to the total variation from the lowest crossing point to the highest, regardless of which edge is crossing. Refers to all crossing points for

this measurement.

5. Defined as the total variation of all crossing voltages of Rising CLK and Falling CLKb. This is the maximum allowed variance in VCROSS for any

particular system.

21

26

32

tR

Rise Time [2]

VT = 20% to 80% of swing

290

429

601

ps

tF

Fall Time [2]

VT = 20% to 80% of swing

271

422

623

ps

VOH

Output High Voltage [2]

VHIGH = 900mV, Fast Slew Rate,

156.25MHz, 312.5MHz.

(Slow slew rate is not recommended for

frequencies > 100MHz)

739

872

1094

mV

VOL

Output Low Voltage [2]

-236

-44

43

VCROSS Crossing Voltage (abs) [3]

285

391

475

ΔVCROSS Crossing Voltage (var) [3][4][5]

21

26

31

tR

Rise Time [2]

VT = 20% to 80% of swing

308

524

729

ps

tF

Fall Time [2]

VT = 20% to 80% of swing

311

476

625

ps

tDC

Output Duty Cycle [6]

6. Measured from differential waveform.

Across all settings in this table, VT = 0V.

48.1

50.0

51.8

%

Table 18. 100 ohm CLK AC/DC Characteristics - Source-Terminated, Non-PCIe Applications [1]

1. Standard high impedance load with CL = 2pF. See Test Loads.

Symbol

Parameter

Conditions

Minimum

Typical

Maximum Unit

VOH

Output High Voltage [2]

2. Measured from single-ended waveform.

VHIGH = 800mV, Fast Slew Rate,

156.25MHz, 312.5MHz.

(Slow slew rate is not recommended for

frequencies > 100MHz)

636

837

958

mV

VOL

Output Low Voltage [2]

-165

-52

49

VCROSS Crossing Voltage (abs) [3]

285

420

571

ΔVCROSS Crossing Voltage (var) [3][4][5]

21

26

32

tR

Rise Time [2]

VT = 20% to 80% of swing

285

390

494

ps

tF

Fall Time [2]

VT = 20% to 80% of swing

279

421

593

ps

VOH

Output High Voltage [2]

VHIGH = 900mV, Fast Slew Rate,

156.25MHz, 312.5MHz.

(Slow slew rate is not recommended for

frequencies > 100MHz)

732

908

1070

mV

VOL

Output Low Voltage [2]

-183

31

52

VCROSS Crossing Voltage (abs) [3]

325

405

598

ΔVCROSS Crossing Voltage (var) [3][4][5]

21

47

33

tR

Rise Time [2]

VT = 20% to 80% of swing

383

491

592

ps

tF

Fall Time [2]

VT = 20% to 80% of swing

334

462

579

ps

tDC

Output Duty Cycle [6]

Across all settings in this table, VT = 0V.

48.2

49.9

51.6

%