R31DS0210EU0106 Rev.1.06

Page 23

May 11, 2026

RC193xx Datasheet

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

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.

6. Measured from differential waveform.

Table 19. 85 ohm CLK AC/DC Characteristics – Double-Terminated, Non-PCIe Applications [1]

1. Both Tx and Rx are terminated (double-terminated) with CL= 2pF. This reduces amplitude by 50%. 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 - amplitude is reduced

by ~50% due to double termination. (Slow slew

rate is not recommended for frequencies

>100MHz)

382

410

436

mV

VOL

Output Low Voltage [2]

-8

13

33

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.

186

206

226

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.

-9

8

25

tR

Rise Time [2]

VT = 20% to 80% of swing

256

368

491

ps

tF

Fall Time [2]

VT = 20% to 80% of swing

225

307

417

ps

VOH

Output High Voltage [2]

VHIGH = 900mV, Fast Slew Rate,

156.25MHz, 312.5MHz - amplitude is reduced

by ~50% due to double termination. (Slow slew

rate is not recommended for frequencies

>100MHz)

415

448

480

mV

VOL

Output Low Voltage [2]

-6

14

35

VCROSS Crossing Voltage (abs) [3]

192

216

239

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

-9

8

27

tR

Rise Time [2]

VT = 20% to 80% of swing

289

418

558

ps

tF

Fall Time [2]

VT = 20% to 80% of swing

227

302

406

ps

tDC

Output Duty Cycle [6]

6. Measured from differential waveform.

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

48.6

49.6

50.5

%

Table 20. 100 ohm CLK AC/DC Characteristics – Double-Terminated, Non-PCIe Applications [1]

Symbol

Parameter

Conditions

Minimum

Typical

Maximum Unit

VOH

Output High Voltage [2]

VHIGH = 800mV, Fast Slew Rate,

156.25MHz, 312.5MHz - amplitude is reduced

by ~50% due to double termination. (Slow slew

rate is not recommended for frequencies >

100MHz)

399

428

456

mV

VOL

Output Low Voltage [2]

-7

13

34

VCROSS Crossing Voltage (abs) [3]

200

228

256

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

-12

7

30

tR

Rise Time [2]

VT = 20% to 80% of swing

196

272

358

ps

tF

Fall Time [2]

VT = 20% to 80% of swing

214

293

388

ps