BU4042B Datasheet, PDF (3/4 Pages) Rohm – Quad D latch

Standard ICs
BU4042B
Switching characteristics (unless otherwise noted, Ta = 25°C, CL = 50pF, VSS = 0V)
Parameter
Symbol Min.
Typ.
Max.
Unit
VDD (V)
—
180
—
5
Output rise time
tTLH
—
90
—
ns
10
—
65
—
15
—
100
—
5
Output fall time
tTHL
—
50
—
ns
10
—
40
—
15
—
220
—
5
Propagation delay time
D→Q, Q
tPLH
tPHL
—
90
—
ns
10
—
70
—
15
—
220
—
5
Propagation delay time
CLOCK→Q, Q
tPLH
tPHL
—
90
—
ns
10
—
70
—
15
—
150
—
5
Minimum clock pulse width tWH
tWL
—
50
—
ns
10
—
40
—
15
—
50
—
5
Hold time
tH
—
25
—
ns
10
—
20
—
15
—
50
—
5
Setup time
tSU
—
20
—
ns
10
—
5
—
15
Input capacitance
CIN
—
5
—
pF
—
Conditions
—
—
—
—
—
—
—
—
Measurement circuit
Fig.1
Fig.1
Fig.1
Fig.2
Fig.2
Fig.2
Fig.2
—
•^{Measurement circuits}
VDD
16
5
VDD
CK
Q1
2
6
POL
Q1
3
Q2
10
4
D1
Q2
9
Q3
11
7
D2
Q3
12
13
D3
Q4
1
14
P.G.
D4
VSS
Q4
5
8
VSS
Note: Connect CL = 50pF to each of the output pins.
Fig. 1 (a) Switching characteristics measurement circuit!
20ns
20ns
D
tPLH
tPHL
Q
tPHL
Q
tTLH
tTHL
tTHL
tTLH
Fig. 1 (b) Switching time measurement waveform!
3