DATA SH EET
Product specification
File under Integrated Circuits, IC04 January 1995
INTEGRATED CIRCUITS
HEF4027B
flip-flops
Dual JK flip-flop
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
January 1995 2
Philips Semiconductors Product specification
Dual JK flip-flop HEF4027B
flip-flops
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.
Fig.1 Functional diagram.
Fig.2 Pinning diagram.
FUNCTION TABLES
Notes
1. H = HIGH state (the more positive voltage)
L = LOW state (the less positive voltage)
X = state is immaterial
= positive-going transition
On+1= state after clock positive transition
PINNING
FAMILY DATA, IDD LIMITS category FLIP-FLOPS
See Family Specifications
INPUTS OUTPUTS
SDCDCP J K O O
HLXXX H L
LHXXX L H
HHXXX H H
INPUTS OUTPUTS
SDCDCP J K On+1On+1
L L L L no change
LL HL H L
LL LH L H
LL HH O
nO
n
J,K synchronous inputs
CP clock input (L to H edge-triggered)
SDasynchronous set-direct input (active HIGH)
CDasynchronous clear-direct input (active HIGH)
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
January 1995 3
Philips Semiconductors Product specification
Dual JK flip-flop HEF4027B
flip-flops
AC CHARACTERISTICS
VSS = 0 V; Tamb =25°C; CL= 50 pF; input transition times ≤20 ns
VDD
VSYMBOL MIN. TYP. MAX. TYPICAL EXTRAPOLATION
FORMULA
Propagation delays
CP →O, O 5 105 210 ns 78 ns +(0,55 ns/pF) CL
HIGH to LOW 10 tPHL 40 80 ns 29 ns +(0,23 ns/pF) CL
15 30 60 ns 22 ns +(0,16 ns/pF) CL
5 85 170 ns 58 ns +(0,55 ns/pF) CL
LOW to HIGH 10 tPLH 35 70 ns 27 ns +(0,23 ns/pF) CL
15 30 60 ns 22 ns +(0,16 ns/pF) CL
SD→O 5 70 140 ns 43 ns +(0,55 ns/pF) CL
LOW to HIGH 10 tPLH 30 60 ns 19 ns +(0,23 ns/pF) CL
15 25 50 ns 17 ns +(0,16 ns/pF) CL
CD→O 5 120 240 ns 93 ns +(0,55 ns/pF) CL
HIGH to LOW 10 tPHL 45 90 ns 33 ns +(0,23 ns/pF) CL
15 35 70 ns 27 ns +(0,16 ns/pF) CL
SD→O 5 140 280 ns 113 ns +(0,55 ns/pF) CL
HIGH to LOW 10 tPHL 55 110 ns 44 ns +(0,23 ns/pF) CL
15 40 80 ns 32 ns +(0,16 ns/pF) CL
Fig.3 Logic diagram (one flip-flop).
January 1995 4
Philips Semiconductors Product specification
Dual JK flip-flop HEF4027B
flip-flops
CD→O 5 75 150 ns 48 ns +(0,55 ns/pF) CL
LOW to HIGH 10 tPLH 35 70 ns 24 ns +(0,23 ns/pF) CL
15 25 50 ns 17 ns +(0,16 ns/pF) CL
Output transition times 5 60 120 ns 10 ns +(1,0 ns/pF) CL
HIGH to LOW 10 tTHL 30 60 ns 9 ns +(0,42 ns/pF) CL
15 20 40 ns 6 ns +(0,28 ns/pF) CL
5 60 120 ns 10 ns +(1,0 ns/pF) CL
LOW to HIGH 10 tTLH 30 60 ns 9 ns +(0,42 ns/pF) CL
15 20 40 ns 6 ns +(0,28 ns/pF) CL
Set-up time 5 50 25 ns
see also waveforms
Figs 4 and 5
J,K →CP 10 tsu 30 10 ns
15 20 5 ns
Hold time 5 25 0 ns
J,K →CP 10 thold 20 0 ns
15 15 5 ns
Minimum clock 5 80 40 ns
pulse width; LOW 10 tWCPL 30 15 ns
15 24 12 ns
Minimum SD,C
D5t
WSDH,
tWCDH
90 45 ns
pulse width; HIGH 10 40 20 ns
15 30 15 ns
Recovery time 5 tRSD,
tRCD
20 −15 ns
for SD,C
D10 15 −10 ns
15 10 −5ns
Maximum clock 5 4 8 MHz see also waveforms
Fig.4
pulse frequency 10 fmax 12 25 MHz
J = K = HIGH 15 15 30 MHz
VDD
VTYPICAL FORMULA FOR P (µW)
Dynamic power 5 900 fi+∑(foCL)×VDD2where
dissipation per 10 4 500 fi+∑(foCL)×VDD2fi= input freq. (MHz)
package (P) 15 13 200 fi+∑(foCL)×VDD2fo= output freq. (MHz)
CL= load capacitance (pF)
∑(foCL) = sum of outputs
VDD = supply voltage (V)
VDD
VSYMBOL MIN. TYP. MAX. TYPICAL EXTRAPOLATION
FORMULA
January 1995 5
Philips Semiconductors Product specification
Dual JK flip-flop HEF4027B
flip-flops
APPLICATION INFORMATION
Some examples of applications for the HEF4027B are:
•Registers
•Counters
•Control circuits
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.
