STP16CPC26PTR(2013) View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

STP16CPC26PTR
(Rev.:2013)

Low voltage 16-bit constant current LED sink driver

STMicroelectronics 

STP16CPC26

Timing diagrams

Table 7.

CLOCK

Truth table

LE

OE

Serial-IN OUT0 ........... OUT7 .............. OUT15(1) SDO

H

L

Dn

Dn ..... Dn - 7 ..... Dn -15

L

L

Dn + 1

No change

H

L

Dn + 2

Dn + 2 ..... Dn - 5 ..... Dn -13

X

L

Dn + 3

Dn + 2 ..... Dn - 5 ..... Dn -13

X

H

Dn + 3

OFF

1. OUTn = ON when Dn = H, OUTn = OFF when Dn = L

Dn - 15

Dn - 14

Dn - 13

Dn - 13

Dn - 13

Figure 12. Timing for clock signal, serial-in and serial out data

$0Y

The correct sampling of the data depends on the stability of the data at SDI on the rising

edge of the clock signal and it is assured by a proper data setup and hold time (tSETUP1 And

tHOLD), as shown in Figure 12. The same figure shows the propagation delay from CLK to

SDO (tPLH/tPHL).

Figure 13 describes the setup times for LE and OE signals (tSETUP2 and tSETUP3

respectively), the minimum duration of these signals (tWLAT and tWENA respectively) and the

propagation delay from CLK to OUTn, LE to OUTn and OE to OUTn (tPLH1/tPHL1, tPLH2/tPHL2

and tPLH3/tPHL3 respectively).

Finally Figure 14 defines the turn-on and turn-off time (tr and tf) of the current generators.

Doc ID 18469 Rev 4

13/26

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