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INTEGRATED CIRCUITS
DATA SH EET
For a complete data sheet, please also download:
•The IC04 LOCMOS HE4000B Logic
Family Specifications HEF, HEC
•The IC04 LOCMOS HE4000B Logic
Package Outlines/Information HEF, HEC
HEF4027B
flip-flops
Dual JK flip-flop
Product specification
File under Integrated Circuits, IC04
January 1995
Page 2
Philips Semiconductors Product specification
Dual JK flip-flop
DESCRIPTION
The HEF4027B is a dual JK flip-flop which is
edge-triggered and features independent set direct
(SD), clear direct (CD), clock (CP) inputs and outputs
(O,O). Data is accepted when CP is LOW, and transferred
to the output on the positive-going edge of the clock. The
active HIGH asynchronous clear-direct (CD) and set-direct
(SD) are independent and override the J, K, and CP inputs.
The outputs are buffered for best system performance.
Schmitt-trigger action in the clock input makes the circuit
highly tolerant to slower clock rise and fall times.
HEF4027B
flip-flops
FUNCTION TABLES
INPUTS OUTPUTS
CDCP J K O O
S
D
HLXXX H L
LHXXX L H
HHXXX H H
INPUTS OUTPUTS
CDCP J K O
S
D
n + 1
L L L L no change
LL HL H L
LL LH L H
LL HH
O
n
Notes
1. H = HIGH state (the more positive voltage)
L = LOW state (the less positive voltage)
X = state is immaterial
= positive-going transition
O
= state after clock positive transition
n + 1
O
n + 1
O
n
Fig.1 Functional diagram.
Fig.2 Pinning diagram.
PINNING
J,K synchronous inputs
CP clock input (L to H edge-triggered)
S
asynchronous set-direct input (active HIGH)
D
C
asynchronous clear-direct input (active HIGH)
D
O true output
O complement output
HEF4027BP(N): 16-lead DIL; plastic (SOT38-1)
HEF4027BD(F): 16-lead DIL; ceramic (cerdip) (SOT74)
HEF4027BT(D): 16-lead SO; plastic (SOT109-1)
( ): Package Designator North America
FAMILY DATA, I
LIMITS category FLIP-FLOPS
DD
See Family Specifications
January 1995 2
Page 3
Philips Semiconductors Product specification
Dual JK flip-flop
HEF4027B
flip-flops
Fig.3 Logic diagram (one flip-flop).
AC CHARACTERISTICS
V
= 0 V; T
SS
=25°C; CL= 50 pF; input transition times ≤ 20 ns
amb
V
DD
V
SYMBOL MIN. TYP. MAX.
TYPICAL EXTRAPOLATION
FORMULA
Propagation delays
CP → O, O 5 105 210 ns 78 ns + (0,55 ns/pF) C
HIGH to LOW 10 t
PHL
40 80 ns 29 ns + (0,23 ns/pF) C
15 30 60 ns 22 ns + (0,16 ns/pF) C
5 85 170 ns 58 ns + (0,55 ns/pF) C
LOW to HIGH 10 t
PLH
35 70 ns 27 ns + (0,23 ns/pF) C
15 30 60 ns 22 ns + (0,16 ns/pF) C
SD→ O 5 70 140 ns 43 ns + (0,55 ns/pF) C
LOW to HIGH 10 t
PLH
30 60 ns 19 ns + (0,23 ns/pF) C
15 25 50 ns 17 ns + (0,16 ns/pF) C
CD→ O 5 120 240 ns 93 ns + (0,55 ns/pF) C
HIGH to LOW 10 t
PHL
45 90 ns 33 ns + (0,23 ns/pF) C
15 35 70 ns 27 ns + (0,16 ns/pF) C
SD→ O 5 140 280 ns 113 ns + (0,55 ns/pF) C
HIGH to LOW 10 t
PHL
55 110 ns 44 ns + (0,23 ns/pF) C
15 40 80 ns 32 ns + (0,16 ns/pF) C
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
January 1995 3
Page 4
Philips Semiconductors Product specification
Dual JK flip-flop
HEF4027B
flip-flops
V
DD
V
SYMBOL MIN. TYP. MAX.
CD→ O 5 75 150 ns 48 ns + (0,55 ns/pF) C
LOW to HIGH 10 t
PLH
35 70 ns 24 ns + (0,23 ns/pF) C
15 25 50 ns 17 ns + (0,16 ns/pF) C
Output transition times 5 60 120 ns 10 ns + (1,0 ns/pF) C
HIGH to LOW 10 t
THL
30 60 ns 9 ns + (0,42 ns/pF) C
15 20 40 ns 6 ns + (0,28 ns/pF) C
5 60 120 ns 10 ns + (1,0 ns/pF) C
LOW to HIGH 10 t
TLH
30 60 ns 9 ns + (0,42 ns/pF) C
15 20 40 ns 6 ns + (0,28 ns/pF) C
Set-up time 5 50 25 ns
J,K → CP 10 t
su
30 10 ns
15 20 5 ns
Hold time 5 25 0 ns
J,K → CP 10 t
hold
20 0 ns
15 15 5 ns
Minimum clock 5 80 40 ns
pulse width; LOW 10 t
WCPL
30 15 ns
15 24 12 ns
Minimum SD,C
D
pulse width; HIGH 10 40 20 ns
Recovery time 5
for S
D,CD
5
t
WSDH,
t
15 30 15 ns
WCDH
90 45 ns
20 −15 ns
t
10 15 −10 ns
15 10 −5ns
RSD,
t
RCD
Maximum clock 5 4 8 MHz
pulse frequency 10 f
max
12 25 MHz
J = K = HIGH 15 15 30 MHz
TYPICAL EXTRAPOLATION
FORMULA
see also waveforms
Figs 4 and 5
see also waveforms
Fig.4
L
L
L
L
L
L
L
L
L
V
DD
V
Dynamic power 5 900 f
dissipation per 10 4 500 f
package (P) 15 13 200 f
TYPICAL FORMULA FOR P (µW)
+∑(foCL) × V
i
+∑(foCL) × V
i
+∑(foCL) × V
i
January 1995 4
DD
DD
DD
2
2
2
where
fi= input freq. (MHz)
fo= output freq. (MHz)
C
= load capacitance (pF)
L
∑ (f
) = sum of outputs
oCL
V
= supply voltage (V)
DD
Page 5
Philips Semiconductors Product specification
Dual JK flip-flop
HEF4027B
flip-flops
Fig.4 Waveforms showing set-up times, hold times and minimum clock pulse width. Set-up and hold times are
shown as positive values but may be specified as negative values.
Fig.5 Waveforms showing recovery times for SDand CD; minimum SDand CDpulse widths.
APPLICATION INFORMATION
Some examples of applications for the HEF4027B are:
• Registers
• Counters
• Control circuits
January 1995 5
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