TS3L500

16BIT TO 8BIT SPDT GIGABIT LAN SWITCH

WITH LED SWITCH

SCDS212B − SEPTEMBER 2005 − REVISED APRIL 2006

9

POST OFFICE BOX 655303

PARAMETER MEASUREMENT INFORMATION

Skew

CL

(see Note A)

TEST CIRCUIT

S1

2

× VCC

Open

GND

RL

RL

VOH

VOL

VOLTAGE WAVEFORMS

OUTPUT SKEW (tsk(o))

Data Out at

YB1 or YB2

NOTES: A. CL includes probe and jig capacitance.

B. Waveform 1 is for an output with internal conditions such that the output is low, except when disabled by the output control.

Waveform 2 is for an output with internal conditions such that the output is high, except when disabled by the output control.

C. All input pulses are supplied by generators having the following characteristics: PRR

≤ 10 MHz, ZO = 50 Ω, tr ≤ 2.5 ns, tf ≤ 2.5 ns.

D. The outputs are measured one at a time, with one transition per measurement.

50

Ω

VG1

VCC

DUT

50

Ω

VIN

50

Ω

VG2

50

Ω

VI

TEST

RL

S1

CL

3.3 V

± 0.3 V

VCC

Vin

tsk(p)

tsk(o)

3.3 V

± 0.3 V

Open

Open

200

Ω

200

Ω

VCC or GND

VCC or GND

10 pF

10 pF

Input Generator

Input Generator

VO

(VOH + VOL)/2

VOH

VOL

Data Out at

XB1 or XB2

(VOH + VOL)/2

3.5 V

1.5 V

Data In at

Ax or Ay

2.5 V

tPLHx

tPHLx

tsk(o)

tsk(o)

tPLHy

tPHLy

tsk(o) = |tPLHy − tPLHx| or |tPHLy − tPHLx|

VOH

VOL

VOLTAGE WAVEFORMS

PULSE SKEW [tsk(p)]

Output

(VOH + VOL)/2

Input

2.5 V

tPLH

tPHL

tsk(p) = |tPHL − tPLH|

3.5 V

1.5 V

VO

VI

VO

Figure 6. Test Circuit and Voltage Waveforms