BU4538B
BU4538B is Dual precision monostable multivibrator 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 1 LS-TTL input.
- Block diagram
T1A 1 BA CD Q T1 T2 Q 16 VDD 15 T1B 14 T2B 13 CDB 12 AB 11 BB 10 QB 9 QB T2A 2
BA CD Q T1 T2 Q
QA QA
- Logic circuit diagram
VDD VDD RX 2 (14) T2 CX 1 (15) T1 4 (12) A B CD 5 (11) 3 (13) Q Q S Reset Latch R Control Vref1 Enable Vref2 Enable S Q Output Latch 7 (9) R Q 6 (10)
- Truth table
INPUT A B H L H L X X CD H H H H L L H L L H H Q OUTPUT Q
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 V
Electrical characteristics
- DC characteristics (unless otherwise noted, Ta = 25°C, V
Parameter Symbol Min. 3.5 Input high level voltage VIH 7.0 11.0
- Input low level voltage VIL
- - Input high level current Input low level current IIH IIL
- - 4.95 Output high level voltage VOH 9.95 14.95
- Output low level voltage VOL
- -
- 0.16 Output high level current IOH
- 0.4
- 1.2 0.44 Output low level current IOL 1.1 3.0
- Static current dissipation IDD
- - Typ.
- -
- -
- -
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