TLC5957 datasheet(7/25 Pages) TI1

Part #	TLC5957

Description	TLC5957 48-Channel, 16-Bit ES-PWM LED Driver with Pre-Charge FET, LED OPEN Detection and Caterpillar Cancelling

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Manufacturer	TI1 [Texas Instruments]

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GND

V

CC

GND

V

CC

GND

50%

t

SU

50%

t

H

t

WHO , tWL0 , tWH1, tWL1, tWH2

INPUT

CLOCK

INPUT

(1)

DATA/CONTROL

INPUT

(1)

t

SU0 , tSU1 , tSU2 , tSU3 , tH0 , t1

S CLK

3

4

5

1

2

t

H2

t

H2

1022 1023 1024

1

2

3

LAT

LAT Signal needs to include falling edge of SCLK

t

wh

t

wl

V

CC

TLC5957

www.ti.com

SLVSCQ4 – OCTOBER 2014

7.6 Timing Requirements

At TA = –40°C to 85°C, unless otherwise noted.

MIN

TYP

MAX

UNIT

AC CHARACTERISTICS, VCC = 3 V to 5.5 V

tWH0

SCLK

10

ns

tWL0

SCLK

10

ns

tWH1

Pulse duration

GCLK

10

ns

tWL1

GCLK

10

ns

tWH2

LAT

10

ns

tSU0

SIN – SCLK

↑

2

ns

tSU1

LAT

↑ – SCLK↑

3

ns

Setup time

LAT

↓ – SCLK↑ , for WRTGS, WRTFC, and TMGST Command

20

ns

tSU2

LAT

↓ – SCLK↑ , for LATGS, READFC, and LINERESET Command

80

ns

tSU3

LAT

↓ – GCLK↑ , for LATGS AND LINERESET Command

30

ns

tH0

SCLK

↑ – SIN

2

ns

tH1

SCLK

↑ – LAT↑

2

ns

tH2

SCLK

↓ – LAT↓

2

ns

Figure 1. Input Timing

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