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gates
Quadruple 2-input NAND Schmitt
trigger
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INTEGRATED CIRCUITS
DATA SHEET
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
HEF4093B gates Quadruple 2-input NAND Schmitt trigger
Product specification File under Integrated Circuits, IC04 January 1995
Philips Semiconductors
Product specification
Quadruple 2-input NAND Schmitt trigger
DESCRIPTION The HEF4093B consists of four Schmitt-trigger circuits. Each circuit functions as a two-input NAND gate with Schmitt-trigger action on both inputs. The gate switches at different points for positive and negative-going signals. The difference between the positive voltage (VP) and the negative voltage (VN) is defined as hysteresis voltage (VH).
HEF4093B gates
Fig.2 Pinning diagram.
HEF4093BP(N): HEF4093BD(F): HEF4093BT(D):
14-lead DIL; plastic (SOT27-1) 14-lead DIL; ceramic (cerdip) (SOT73) 14-lead SO; plastic (SOT108-1)
( ): Package Designator North America
Fig.3 Logic diagram (one gate).
FAMILY DATA, IDD LIMITS category GATES See Family Specifications
Fig.1 Functional diagram.
January 1995
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Philips Semiconductors
Product specification
Quadruple 2-input NAND Schmitt trigger
DC CHARACTERISTICS VSS = 0 V; Tamb = 25 °C VDD V Hysteresis voltage Switching levels positive-going input voltage negative-going input voltage 5 10 15 5 10 15 5 10 15 VN VP VH SYMBOL MIN. 0,4 0,6 0,7 1,9 3,6 4,7 1,5 3 4 TYP. 0,7 1,0 1,3 2,9 5,2 7,3 2,2 4,2 6,0 - - - 3,5 7 11 3,1 6,4 10,3
HEF4093B gates
MAX. V V V V V V V V V
Fig.5 Fig.4 Transfer characteristic.
Waveforms showing definition of VP, VN and VH; where VN and VP are between limits of 30% and 70%.
January 1995
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Philips Semiconductors
Product specification
Quadruple 2-input NAND Schmitt trigger
AC CHARACTERISTICS VSS = 0 V; Tamb = 25 °C; CL = 50 pF; input transition times 20 ns VDD V Propagation delays In On HIGH to LOW LOW to HIGH Output transition times HIGH to LOW 5 10 15 5 10 15 5 10 15 5 LOW to HIGH 10 15 tTLH tTHL tPLH tPHL SYMBOL TYP. 90 40 30 85 40 30 60 30 20 60 30 20 MAX. 185 ns 80 ns 60 ns 170 ns 80 ns 60 ns 120 ns 60 ns 40 ns 120 ns 60 ns 40 ns
HEF4093B gates
TYPICAL EXTRAPOLATION FORMULA 63 ns + (0,55 ns/pF) CL 29 ns + (0,23 ns/pF) CL 22 ns + (0,16 ns/pF) CL 58 ns + (0,55 ns/pF) CL 29 ns + (0,23 ns/pF) CL 22 ns + (0,16 ns/pF) CL 10 ns + (1,0 ns/pF) CL 9 ns + (0,42 ns/pF) CL 6 ns + (0,28 ns/pF) CL 10 ns + (1,0 ns/pF) CL 9 ns + (0,42 ns/pF) CL 6 ns + (0,28 ns/pF) CL
VDD V Dynamic power dissipation per package (P) 5 10 15
TYPICAL FORMULA FOR P (µW) 1300 fi + (foCL) × VDD2 6400 fi + (foCL) × VDD 18 700 fi + (foCL) × VDD
2 2
where fi = input freq. (MHz) fo = output freq. (MHz) CL = load capacitance (pF) (foCL) = sum of outputs VDD = supply voltage (V)
January 1995
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Philips Semiconductors
Product specification
Quadruple 2-input NAND Schmitt trigger
HEF4093B gates
Fig.6
Typical drain current as a function of input voltage; VDD = 5 V; Tamb = 25 °C.
Fig.7
Typical drain current as a function of input voltage; VDD =10 V; Tamb = 25 °C.
Fig.8
Typical drain current as a function of input voltage; VDD = 15 V; Tamb = 25 °C.
January 1995
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Philips Semiconductors
Product specification
Quadruple 2-input NAND Schmitt trigger
HEF4093B gates
Fig.9 Typical switching levels as a function of supply voltage VDD; Tamb = 25 °C.
APPLICATION INFORMATION Some examples of applications for the HEF4093B are: · Wave and pulse shapers · Astable multivibrators · Monostable multivibrators.
Fig.10 The HEF4093B used as a astable multivibrator.
Fig.11 Schmitt trigger driven via a high impedance (R > 1 k).
If a Schmitt trigger is driven via a high impedance (R > 1 k) then it is necessary to incorporate a capacitor C of such value that: C V DD V SS ------ > -------------------------- , otherwise oscillation can occur on the edges of a pulse. VH Cp Cp is the external parasitic capacitance between inputs and output; the value depends on the circuit board layout. Note The two inputs may be connected together, but this will result in a larger through-current at the moment of switching.
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