11

Table 7. Two-Wire Interface Electrical Characteristics

Parameter

Symbol

Min.

Max.

Unit

Conditions

Host Vcc Range

VccHTWI

3.135

3.465

V

SCL and SDA

0.0

0.40

V

VccHTWI - 0.5

VccHTWI + 0.3

V

measured at host side of

connector

SCL and SDA

-0.3

VccT*0.3

V

VccT*0.7

VccT + 0.5

V

Input Current on the

-10

10

μA

SCL and SDA Contacts

Capacitance on SCL

14

pF

and SDA Contacts

Total bus capacitance

100

pF

At 400 kHz, 3.0 kΩ Rp, max

for SCL and for SDA

At 100 kHz, 8.0 kΩ Rp, max

290

pF

At 400 kHz, 1.1 kΩRp, max

At 100 kHz, 2.75 kΩ Rp, max

Notes:

1. Rp is the pull up resistor. Active bus termination may be used by the host in place of a pullup resistor. Pull ups can be connected to various

power supplies, however the host board design shall ensure that no module contact has voltage exceeding VccT or VccR by 0.5 V nor requires

the module to sink more than 3.0 mA current.

Figure 4a. Receiver Electrical Optical Eye Mask Definition

Figure 4b. Transmitter Optical Eye Mask Definition

150

0

-150

-425

0

0.35

1.0

0.65

NORMALIZED TIME (UNIT INTERVAL)

425

1.0

0.75

0.73

0.5

0.28

0.25

0

-0.40

0

0.25 0.40 0.45

1

0.55 0.60 0.75

NORMALIZED TIME (UNIT INTERVAL)

1.40