iC-NX

8-CHANNEL LIGHT-GRID PULSE DRIVER

Rev C1, Page 7/10

OPERATING REQUIREMENTS: Logic

Operating Conditions: VDD = 4.75...6.0 V, Ta = 0...70 °C, CL() = 50 pF,

input levels lo = 0...0.45 V, hi = VDD - 0.45...VDD, see Fig. 1 for reference levels and waveforms

Item

Symbol

Parameter

Conditions

Fig.

Unit

No.

Min.

Max.

I001

ten

Activation Time (standby to operation):

DIN lo → hi before CLK lo → hi

4

5

µs

I002

tset

Setup time:

DIN stable before CLK lo → hi

2

50

ns

I003

thold

Hold Time:

DIN stable after CLK lo → hi

2

50

ns

I004

tw

LED Pulse time:

4

0.5

µs

t

V

Vt()hi

Vt()lo

VDD − 0.45 V

0.45 V

0

1

Input/Output

Figure 1: Reference levels

CLK

DIN

Q1= SEND

Q2

t

DOUT

Q3

SHEN

V(LED)

(CLK−DOUT)

set1

(CLK−DOUT)

Figure 2: Timing characteristics

I(LED)

t

Figure 3: LED current pulse

CLK

DIN

Q1 = SEND

DOUT

Q2

Q3

I(LED)

10 %

90 %

SHEN

I(SHEN)

Figure 4: LED current pulse definition by clock signal (dashed line de-

notes I(SHEN) in case of an interrupted LED path)