SLK2501

OC48/24/12/3 SONET/SDH MULTIRATE TRANSCEIVER

SLLS502A – OCTOBER 2001 – REVISED NOVEMBER 2001

14

POST OFFICE BOX 655303

electrical characteristics over recommended operating conditions (unless otherwise noted)

TTL

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

VIH

High-level input voltage

2

3.6

V

VIL

Low-level input voltage

0.80

V

IIH

Input high current

VDD = MAX,

VIN = 2 V

40

µA

IIL

Input low current

VDD = MAX,

VIN = 4 V

–40

µA

VOH

High-level output voltage

IOH = –1 mA

2.10

2.3

V

VOL

Low-level output voltage

IOH = 1 mA

0.25

0.5

V

CI

Input capacitance

4

pF

LVDS input signals

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

VI

Input voltage

825

1575

mV

VID(th)

Input differential threshold voltage

100

mV

CI

Input capacitance

3

pF

RI

Input differential impedance

On-chip termination

80

100

120

Ω

tsu

Input setup time requirement

See Figure 8

300

ps

th

Input hold time requirement

See Figure 8

300

ps

T(duty)

Input clock duty cycle

40%

60%

LVDS output signals

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

VOD

Output differential voltage

300

800

VOS

Output common mode voltage

R

100

±1%

1070

1375

mV

∆VOD

Change VOD between 1 and 0

RL = 100 ±1%

25

mV

∆VOS

Change VOS between 1 and 0

25

I(SP), I(SN),

I(SPN)

Output short circuit current

Outputs shorted to ground or shorted together

24

mA

Ioff

Power-off current

VDD = 0 V

10

µA

t(cq_min)

Clock output time

See Figure 7

100

ps

t(cq_max)

Clock-output time

See Figure 7

100

ps

tr/tf

Output transition time

20%to80%

100

300

ps

Output clock duty cycle

45%

55%

Data output to FRAME_SYNC delay

4

7

Bit

times

timing requirements over recommended operating conditions (unless otherwise noted)

reference clock (REFCLK)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

Frequency tolerance†

–20

20

ppm

Duty cycle

40%

50%

60%

Jitter

12 kHz to 20 MHz

3

ps rms

Frequency range absolute value

622.08

MHz

† The

±20 ppm tolerance is required to meet SONET/SDH requirements. For non-SONET/SDH compliant systems, looser tolerances may apply.