d a t a sh eet product speci?cation file under integrated circuits, ic04 january 1995 integrated circuits hef4093b gates quadruple 2-input nand schmitt trigger 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 speci?cation quadruple 2-input nand schmitt trigger hef4093b gates 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 (v p ) and the negative voltage (v n ) is defined as hysteresis voltage (v h ). fig.1 functional diagram. family data, i dd limits category gates see family specifications hef4093bp(n): 14-lead dil; plastic (sot27-1) hef4093bd(f): 14-lead dil; ceramic (cerdip) (sot73) hef4093bt(d): 14-lead so; plastic (sot108-1) ( ): package designator north america fig.2 pinning diagram. fig.3 logic diagram (one gate).
january 1995 3 philips semiconductors product speci?cation quadruple 2-input nand schmitt trigger hef4093b gates dc characteristics v ss = 0 v; t amb =25 c v dd v symbol min. typ. max. hysteresis 5 0,4 0,7 - v voltage 10 v h 0,6 1,0 - v 15 0,7 1,3 - v switching levels 5 1,9 2,9 3,5 v positive-going 10 v p 3,6 5,2 7 v input voltage 15 4,7 7,3 11 v negative-going 5 1,5 2,2 3,1 v input voltage 10 v n 3 4,2 6,4 v 15 4 6,0 10,3 v fig.4 transfer characteristic. fig.5 waveforms showing definition of v p ,v n and v h ; where v n and v p are between limits of 30% and 70%.
january 1995 4 philips semiconductors product speci?cation quadruple 2-input nand schmitt trigger hef4093b gates ac characteristics v ss = 0 v; t amb =25 c; c l = 50 pf; input transition times 20 ns v dd v symbol typ. max. typical extrapolation formula propagation delays 5 90 185 ns 63 ns + (0,55 ns/pf) c l i n ? o n 10 t phl 40 80 ns 29 ns + (0,23 ns/pf) c l high to low 15 30 60 ns 22 ns + (0,16 ns/pf) c l 5 85 170 ns 58 ns + (0,55 ns/pf) c l low to high 10 t plh 40 80 ns 29 ns + (0,23 ns/pf) c l 15 30 60 ns 22 ns + (0,16 ns/pf) c l output transition times 5 60 120 ns 10 ns + (1,0 ns/pf) c l high to low 10 t thl 30 60 ns 9 ns + (0,42 ns/pf) c l 15 20 40 ns 6 ns + (0,28 ns/pf) c l 5 60 120 ns 10 ns + (1,0 ns/pf) c l low to high 10 t tlh 30 60 ns 9 ns + (0,42 ns/pf) c l 15 20 40 ns 6 ns + (0,28 ns/pf) c l v dd v typical formula for p ( m w) dynamic power 5 1300 f i +? (f o c l ) v dd 2 where dissipation per 10 6400 f i +? (f o c l ) v dd 2 f i = input freq. (mhz) package (p) 15 18 700 f i +? (f o c l ) v dd 2 f o = output freq. (mhz) c l = load capacitance (pf) ? (f o c l ) = sum of outputs v dd = supply voltage (v)
january 1995 5 philips semiconductors product speci?cation quadruple 2-input nand schmitt trigger hef4093b gates fig.6 typical drain current as a function of input voltage; v dd = 5 v; t amb =25 c. fig.7 typical drain current as a function of input voltage; v dd =10 v; t amb =25 c. fig.8 typical drain current as a function of input voltage; v dd = 15 v; t amb =25 c.
january 1995 6 philips semiconductors product speci?cation quadruple 2-input nand schmitt trigger hef4093b gates fig.9 typical switching levels as a function of supply voltage v dd ;t amb =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 > 1k w ). if a schmitt trigger is driven via a high impedance (r > 1 k w ) then it is necessary to incorporate a capacitor c of such value that: c p 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. c c p ------ - v dd v ss C v h --------------------------- , otherwise oscillation can occur on the edges of a pulse. >
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