NOA2301 datasheet(4/19 Pages) ONSEMI

Part #	NOA2301

Description	Digital Proximity Sensor

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Manufacturer	ONSEMI [ON Semiconductor]

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NOA2301

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4

Table 4. ELECTRICAL CHARACTERISTICS (Unless otherwise specified, these specifications apply over 2.3 V < VDD < 3.6 V,

1.7 V < VDD_I2C < 1.9 V, −40

°C < TA < 80°C, 10 pF < Cb < 100 pF) (See Note 4)

Parameter

Symbol

Min

Typ

Max

Unit

LED pulse current

ILED_pulse

10

160

mA

LED pulse current step size

ILED_pulse_step

5

mA

LED pulse current accuracy

ILED_acc

−20

+20

%

Interval Timer Tolerance

Tolf_timer

−35

+35

%

Edge Triggered Interrupt Pulse Width

PWINT

50

mS

SCL clock frequency

fSCL_std

10

100

kHz

fSCL_fast

100

400

fSCL_hs

100

3400

Hold time for START condition. After this period, the first

clock pulse is generated.

THD;STA_std

4.0

−

mS

tHD;STA_fast

0.6

−

tHD;STA_hs

0.160

−

Low period of SCL clock

tLOW_std

4.7

−

mS

tLOW_fast

1.3

−

tLOW_hs

0.160

−

High period of SCL clock

tHIGH_std

4.0

−

mS

tHIGH_fast

0.6

−

tHIGH_hs

0.060

−

SDA Data hold time

tHD;DAT_d_std

0

3.45

mS

tHD;DAT_d_fast

0

0.9

tHD;DAT_d_hs

0

0.070

SDA Data set−up time

tSU;DAT_std

250

−

nS

tSU;DAT_fast

100

−

tSU;DAT_hs

10

Rise time of both SDA and SCL (input signals) (Note 5)

tr_INPUT_std

20

1000

nS

tr_INPUT_fast

20

300

tr_INPUT_hs

10

40

Fall time of both SDA and SCL (input signals) (Note 5)

tf_INPUT_std

20

300

nS

tf_INPUT_fast

20

300

tf_INPUT_hs

10

40

Rise time of SDA output signal (Note 5)

tr_OUT_std

20

300

nS

tr_OUT_fast

20 + 0.1 Cb

300

tr_OUT_hs

10

80

Fall time of SDA output signal (Note 5)

tf_OUT_std

20

300

nS

tf_OUT_fast

20 + 0.1 Cb

300

tf_OUT_hs

10

80

Set−up time for STOP condition

tSU;STO_std

4.0

−

mS

tSU;STO_fast

0.6

−

tSU;STO_hs

0.160

−

4. Refer to Figure 2 and Figure 3 for more information on AC characteristics.

5. The rise time and fall time are dependent on both the bus capacitance (Cb) and the bus pull−up resistor Rp. Max and min pull−up resistor

values are determined as follows: Rp(max) = tr (max)/(0.8473 x Cb) and Rp(min) = (Vdd_I2C – Vol(max))/Iol.

6. Cb = capacitance of one bus line, maximum value of which including all parasitic capacitances should be less than 100 pF. Bus capacitance

up to 400 pF is supported, but at relaxed timing.

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