ISL33001, ISL33002, ISL33003

FN7560 Rev 6.02

Page 13 of 20

Oct 2, 2023

Figure 12 shows the corresponding input and output signals.

With its accelerators disabled, the ISL33002 behaves like a

standard I2C buffer, whose high output steady states are purely

determined by the external 1.8V supply through the pull-up

resistors, R4 and R5. As shown in Figure 12, both I2C outputs are

without overshoot.

The supply of the output side (VCC2) is reduced to 2.4V, just 0.1V

above the specified minimum supply level. This ensures reliable

device operation, but also minimizes the distance between VCC2

and the external 1.8V bus voltage, which eases the internal

biasing of the output switches.

VCC2 can be generated either by a separate 2.4V power supply,

or by deriving it from VCC1 using a 2.4V Zener diode and series

resistor, R3. The 100nF buffer capacitance, C1, is needed to

provide sufficient supply current during the switching of the

output stages.

FIGURE 12. 3.3V INPUT AND 1.8V OUTPUT SIGNALS FOR DISABLED

ACCELERATOR

2V/Div

20µs/Div

SCL_IN

SCL_OUT

SDA_IN

SDA_OUT

Typical Performance Curves C

IN = COUT = 10pF, VCC1 = VCC2 = VCC, TA = +25°C; Unless Otherwise Specified.

FIGURE 13. ICC1 ENABLED CURRENT vs VCC1 (ISL33001)

FIGURE 14. ICC1 DISABLED CURRENT vs VCC1 (ISL33001)

FIGURE 15. ICC1 ENABLED CURRENT vs VCC1 (ISL33002 AND

ISL33003)

FIGURE 16. ICC1 DISABLED CURRENT vs VCC1 (ISL33003)

VCC1 (V)

1.2

1.3

1.4

1.5

1.6

1.7

1.8

1.9

2.0

2.1

2.2

2.3

2.4

2.02.5

3.03.5

4.04.5

5.05.5

6.0

T = +85°C

T = +25°C

T = -40°C

VCC1 (V)

100

150

200

250

300

350

400

450

500

550

600

2.0

2.5

3.0

3.5

4.0

4.5

5.0

5.5

6.0

T = +85°C

T = +25°C

VCC1 (V)

1.2

1.3

1.4

1.5

1.6

1.7

1.8

1.9

2.0

2.1

2.2

2.3

2.4

2.0

2.5

3.0

3.5

4.0

4.5

5.0

5.5

6.0

T = +25°C

T = -40°C

T = +85°C

VCC1 (V)

VCC2 = 5.5V

VCC1 (V)

0

10

20

30

40

50

60

2.0

2.5

3.0

3.5

4.0

4.5

5.0

5.5

6.0

T = +25°C

T = +85°C

VCC2 = 5.5V