IDT®

Six Output Differential Buffer for PCIe Gen3

1668F—10/20/16

9DB633

Six Output Differential Buffer for PCIe Gen3

5

Datasheet

Electrical Characteristics - DIF 0.7V Current Mode Differential Outputs

TA = TCOM or TIND; Supply Voltage VDD = 3.3 V +/-5%

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS NOTES

Slew rate

Trf

Scope averaging on

0.6

2.5

4

V/ns

1, 2, 3

Slew rate matching

Trf

Slew rate matching, Scope averaging on

9.5

20

%

1, 2, 4

Voltage High

VHigh

660

740

850

1

Voltage Low

VLow

-150

8

150

1

Max Voltage

Vmax

760

1150

1

Min Voltage

Vmin

-300

-3

1

Vswing

Vswing

Scope averaging off

300

1506

mV

1, 2

Crossing Voltage (abs)

Vcross_abs

Scope averaging off

250

378

550

mV

1, 5

Crossing Voltage (var)

-Vcross

Scope averaging off

54

140

mV

1, 6

2 Measured from differential waveform

6 The total variation of all Vcross measurements in any particular system. Note that this is a subset of V_cross_min/max (V_cross absolute)

allowed. The intent is to limit Vcross induced modulation by setting V_cross_delta to be smaller than V_cross absolute.

mV

Statistical measurement on single-ended signal

using oscilloscope math function. (Scope averaging

on)

Measurement on single ended signal using absolute

value. (Scope averaging off)

mV

1Guaranteed by design and characterization, not 100% tested in production. IREF = VDD/(3xR

R). For RR = 475Ω (1%), IREF = 2.32mA. IOH =

6 x IREF and VOH = 0.7V @ ZO=50Ω (100 differential impedance).

3 Slew rate is measured through the Vswing voltage range centered around differential 0V. This results in a +/-150mV window around

differential 0V.

4 Matching applies to rising edge rate for Clock and falling edge rate for Clock#. It is measured using a +/-75mV window centered on the

average cross point where Clock rising meets Clock# falling. The median cross point is used to calculate the voltage thresholds the

oscilloscope is to use for the edge rate calculations.

5 Vcross is defined as voltage where Clock = Clock# measured on a component test board and only applies to the differential rising edge (i.e.

Clock rising and Clock# falling).

Electrical Characteristics - Current Consumption

TA = TCOM or TIND; Supply Voltage VDD = 3.3 V +/-5%

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS NOTES

Operating Supply Current

IDD3.3OP

All outputs active @100MHz, CL = Full load;

134

150

mA

1

IDD3.3PD

All diff pairs driven

N/A

mA

1

IDD3.3PDZ

All differential pairs tri-stated

N/A

mA

1

1Guaranteed by design and characterization, not 100% tested in production.

Powerdown Current

Electrical Characteristics - DIF_IN Clock Input Parameters

TAMB=TCOM or TIND unless otherwise indicated, Supply Voltages per normal operation conditions, See Test Loads for Loading Conditions

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS NOTES

Input Crossover Voltage -

DIF_IN

VCROSS

Cross Over Voltage

150

375

900

mV

1

Input Swing - DIF_IN

VSWING

Differential value

300

mV

1

Input Slew Rate - DIF_IN

dv/dt

Measured differentially

1

8

V/ns

1,2

Input Leakage Current

IIN

VIN = VDD , VIN = GND

-5

5

uA

Input Duty Cycle

dtin

Measurement from differential wavefrom

45

55

%

1

Input Jitter - Cycle to Cycle

JDIFIn

Differential Measurement

0

125

ps

1

1 Guaranteed by design and characterization, not 100% tested in production.

2Slew rate measured through +/-75mV window centered around differential zero