Technical Specification

Supply Voltage (Vcc)	-0,5 V to 6,0 V
Input Voltage I2C-lines	Vcc
Testpin Input	Vcc
Temperature Range	0°C to +40°C
Sink Current (on Line)	200 mA
Isolation Voltage	2500V

Warning: Stresses beyond those listed may cause permanent damage to the device!

Power Supply Characteristics

	Min	Typ	Max	Unit
Supply Voltage	1,5	-	5,5	V
Power Mode Switch Voltage	-	2,5	-	V
Power Mode Switching Hysteresis	-	600	-	mV
Power Dissipation (one Bus)	40	-	100	mW

I2C-Line Characteristics

	Min	Typ	Max	Unit
Max. Transfer Speed	0	-	800	kHz*
Propagation Delay	-	50	-	ns**
Capacity	-	-	50	pF
Sink Current	-	-	200	mA

*) Accelerated Fast Mode (Fast Mode ist specified with 400 kbit/s only). This means that boosting, as specified for High-Speed Modes above 400 kbit/s, is not supported.

**) This is the delay between the detection of an active external device and the activation of the appropriate transducer on the other bus. The overall propagation delay depends on the bus capacity and the pull-up resistors.

Testpin Characteristics

	Min	Typ	Max	Unit
Logic High Input Threshold	-	0,85	-	V
Logic Low Input Threshold	-	0,4	-	V
Logic High Output Voltage	-	-	Vcc	V
Logic Low Output Voltage	-	-	100	mV
Propagation Delay	-	-	200	ns

Reference Voltage

Figure 2 shows Optii's internal reference voltage for both power modes.

: Figure 2 Internal Reference Voltage Uref

Remaining Voltage

Figure 3 shows the remaining voltage if Optii pulls down an I2C line in dependency of the pull-up resistor Rp.

: Figure 3 Remaining Voltage Ulow

Supply Current

The necessary supply current for proper operation in dependency of the supply voltage is shown in Figure 4. This is the current for a single bus only.

: Figure 4 Supply Current (Single Bus)

Power Consumption

The typical power dissipation of a single bus is shown in Figure 5.

: Figure 5 Power Dissipation (Single Bus)