BA829 Datasheet, PDF (7/7 Pages) Rohm – 8-bit, serial IN, parallel OUT driver

Standard ICs
•^{Electrical characteristic curves}
400
2000
300
1500
1100
200
1000
100
500
BA829
400
Ta = 50°C
Ta = 70°C
Ta = 25°C
300
46% 55% 90%
200
180mA
100
13.5
0
6
12
18
24
OUTPUT SUPPLIED VOLTAGE : VO (V)
Fig.6 Output supplied voltage vs. output
current and range of usdoility
This product should be used within the range
indicated by the shaded section above, even
if the load includes reactance.
0
25
75
125
AMBIENT TEMPERATURE : Ta (°C)
0
61%
85%
20
40
60
80 100
STB DUTY (%)
Fig.7 Ambient temperature vs.
power dissipation
Fig.8 Output duty maximum output
current (when all bits are on,
duty cycle is 1Hz or higher)
•^{Circuit operation}
The BA829 has the internal configuration shown in the
logic diagram, with the following five input pins: clock
(CLK), data (DATA), latch (LATCH), strobe (STB), and
power switch (PSW).
Data input is synchronized to the clock, with data being
read serially at the rising edge and latched at the rising
edge of the shift register after it has shifted. The
latched data appears at output terminals O1 to O8,
depending on the strobe input, with that pulse width
•^{External dimensions (Units: mm)}
being the same as that of the strobe input.
The data output pin DOUT is used when ICs are con-
nected in cascade format, and when the output for the
last stage of the shift register appears, is connected to
the next data input pin DATA.
When these clock and strobe latches and power switch
are used in common, the output pins can be increased
by eight bits each.
In stand-by mode, the power switch is set to “L”.
22.9 ± 0.3
18
10
1
2.54
9
7.62
0.5 ± 0.1
0° ~ 15°
0.3 ± 0.1
DIP18
7