BU4042B
BU4042B is Quad D latch manufactured by ROHM.
Features
- 1) Low power dissipation. 2) Wide range of operating power supply voltages. 3) High input impedance.
4) High fan-out. 5) Direct drive of 2 L-TTL inputs and 1LS-TTL input.
- Block diagram
Q4 1 16 VDD Q1 2 CL D Q Q Q1 3 CL D D1 4 Q Q 13 D3 14 D4 15 Q4
- Logic circuit diagram
D1 (4) LATCH 1 (2) (3) Q1 Q1
D2 (7)
LATCH 2
(10) Q2 (9) Q2
D3 (13)
LATCH 3
(11) Q3 (12) Q3
CLOCK
CL D Q Q
12 Q3 D4 (14) CLOCK (5) POLARITY (6) LATCH 4
POLARITY
6 CL D
11 Q3
(1)
Q4
(15) Q4
D2
10 Q2
Q2
- Truth table
CLOCK L H H L POLARITY L L H H Q D LATCH D LATCH
Standard ICs
- Absolute maximum ratings (Ta = 25°C, V
Parameter Power supply voltage Power dissipation Operating temperature Storage temperature Input voltage Symbol VDD Pd Topr Tstg VIN
= 0V)
Limits
- 0.3 ~ + 18 1000 (DIP)
- 40 ~ + 85
- 55 ~ + 150
- 0.3 ~ VDD + 0.3 Unit V m W °C °C...
