408
Digital Electronics
Table 10.1 (continued).
IC type
Function
Logic
number
family
4013
Dual D-type flip-flop
CMOS
4027
Dual J -K flip-flop
CMOS
4042
Quad D-type latch
CMOS
4044
Quad R-S latch with three-state output
CMOS
4047
Low-power monostable/astable multivibrator
CMOS
4076
Quad D-type flip-flop with three-state output
CMOS
40174
Hex D-type flip-flop
CMOS
40175
Quad D-type flip-flop
CMOS
4511
BCD to seven-segment latch/decoder/driver
CMOS
4528
Dual retriggerable resettable monostable multivibrator
CMOS
4543
BCD to seven-segment latch/decoder/driver for LCD
CMOS
4723
Dual four-bit addressable latch
CMOS
4724
Eight-bit addressable latch
CMOS
MC10130
Quad D-type latch
ECL
MC10131
Dual D-type master/slave flip-flop
ECL
MC10133
Quad D-type latch (negative transition)
ECL
MC10135
Dual J -K master/slave flip-flop
ECL
MC10153
Quad latch (positive transition)
ECL
MC10168
Quad D-type latch
ECL
MC10175
Quint latch
ECL
MC10176
Hex D-type master/slave flip-flop
ECL
MC10198
Monostable multivibrator
ECL
MC10231
High-Speed dual D-type M/S flip-flop
ECL
MC1666
Dual clocked R-S flip-flop
ECL
MC1668
Dual clocked latch
ECL
MC1670
D-type master/slave flip-flop
ECL
MC1658
Voltage-controlled multivibrator
ECL
Review Questions
1. Briefly describe the operational aspects of bistable, monostable and astable multivibrators. Which
multivibrator closely resembles a flip-flop?
2. What is a flip-flop? Show the logic implementation of an R-S flip-flop having active HIGH R and
S inputs. Draw its truth table and mark the invalid entry.
3. With the help of the logic diagram, describe the operation of a clocked R-S flip-flop with active
LOW R and S inputs. Draw the truth table of this flip-flop if it were negatively edge triggered.
4. What is a clocked J -K flip-flop? What improvement does it have over a clocked R-S flip-flop?
5. Differentiate between:
(a) synchronous and asynchronous inputs;
(b) level-triggered and edge-triggered flip-flops;
(c) active LOW and active HIGH inputs.
6. Briefly describe the following flip-flop timing parameters: