TLC6C5912 Datasheet, PDF (6/23 Pages) Texas Instruments – TLC6C5912 12-Channel Shift-Register LED Driver

TLC6C5912
SLIS180 – MAY 2016
Switching Characteristics (continued)
V_CC = 5 V, T_A = 25°C
PARAMETER
f_(SRCK)
t_{SRCK_WH}
t_{SRCK_WL}
Serial clock frequency
SRCK pulse duration, high
SRCK pulse duration, low
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TEST CONDITIONS
C_L = 30 pF, I_D = 20 mA
MIN TYP MAX
10
30
30
UNIT
MHz
ns
ns
12
11 10
9
8
7
6
5
4
3
2
1
SRCK
SER IN
CLR 1
SER OUT 0
Figure 1. SER IN to SER OUT Waveform
Figure 1 shows the SER IN to SER OUT waveform. The output signal appears on the falling edge of the shift
register clock (SRCK) because there is a phase inverter at SER OUT (see Figure 2). As a result, it takes seven
and a half periods of SRCK for data to transfer from SER IN to SER OUT.
G
Output
SRCK
SER IN
50%
t_PLH
10%
90%
t_r
50%
50%
t_PHL
90%
t_su
t_h
50%
50%
t_w
Switching Times, Input Setup and Hold Waveforms
5V
10%
t_f
0V
10 V
0.5 V
5V
0V
5V
0V
SRCK
50%
50%
t_pd
t_pd
SER OUT
50%
50%
SER OUT Propagation Delay Waveform
Figure 2. Switching Times and Voltage Waveforms
Figure 2 shows the switching times and voltage waveforms. Tests for all these parameters took place using the
test circuit shown in Figure 12.
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