BU4021B Datasheet, PDF (4/5 Pages) Rohm – 8-bit static shift register

Standard ICs
•^{Measurement circuit}
SW1
VDD
P.G.
P.G.
BU4021B / BU4021BF
P/S
CLK
P1
P2
P3
Q6
P4
Q7
P5
Q8
P6
P7
P8
DS
VSS
SW2
CL
GND
Fig.1 Switching characteristics measurement circuit
Parallel or
Serial Data
20ns
90%
50%
10%
tsu
tw
20ns
tr
CLOCK or P / S
tPLH
OUTPUT
tf
tPHL
tTLH
tTHL
VDD
GND
VDD
GND
VOH
VOL
•Electrical characteristic curve
1200
DIP16
1000
Fig.2 Switching characteristics waveform
800
600 _SOP16
400
200
0
0 25 50 75 100 125 150
AMBIENT TEMPERATURE: Ta (°C)
Fig.3 Power dissipation vs.
ambient temperature
4