BA226F ROHM [Rohm], BA226F Datasheet - Page 3

• Manufacturer Part Number: BA226F
• Description: CR timer
• Manufacturer: ROHM [Rohm]

•
•
(1) Timing capacitors (Pins 2 and 6)
Connected between these pins and the ground (GND),
this capacitor determines the one-shot period. We rec-
ommend using a capacitor with a value greater than
1000pF. The one-shot cycle is determined by T = 1 / 2
C • R.
(2) Timing resistor (Pins 2 and 6)
Connected to the power supply line, these resistors
determine the one-shot period. The timing capacitor is
charged through this resistor. The recommended range
for the timing resistor is 10k to 1M .
Standard ICs
Measurement circuit
Attached components
1.010
1.005
1.000
0.995
0.990
0.985
0.980
0
0
Fig. 4 Power supply voltage vs.
POWER SUPPLY VOLTAGE: V
4
delay time
8
12
D.V
C = 0.01 F
R = 100k
16
CC
(V)
A
20
PG
S
2
BA225 / BA225F / BA235 / BA226 / BA226F / BA236
1.020
1.015
1.010
1.005
1.000
0.995
0.990
0.985
0.980
IN
100k
0.1 F
– 25
AMBIENT TEMPERATURE: Ta ( C)
CR
Fig. 5 Temperature vs.
BA225
BA225F
BA235
V
Fig. 7
0
CC
delay time
GND
mA
S
25
(3) Power supply capacitor (Pin 8)
Connect a 0.02 F capacitor between the power supply
pin and the ground (GND) so as to prevent malfunction
resulting from a rise in the impedance of the power
supply line.
(4) Load (Pins 1 and 7)
A load of up to 5mA can be accommodated for both the
inflow current and the outflow current.
1
OUT
Counter
50
V
C = 0.01 F
R = 100k
CC
D.V
= 5V
S
75
0
5mA
ON
OFF
S
5mA
0.001
3
0.01
1.0
0.1
10
0.01
V
CC
Fig. 6 One-shot time
0.1
TIMING PERIOD: T (ms)
characteristics
1
10
100
3