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INTEGRATED CIRCUITS
DATA SHEET
For a complete data sheet, please also download:
* The IC06 74HC/HCT/HCU/HCMOS Logic Family Specifications * The IC06 74HC/HCT/HCU/HCMOS Logic Package Information * The IC06 74HC/HCT/HCU/HCMOS Logic Package Outlines
74HC/HCT390 Dual decade ripple counter
Product specification File under Integrated Circuits, IC06 December 1990
Philips Semiconductors
Product specification
Dual decade ripple counter
FEATURES * Two BCD decade or bi-quinary counters * One package can be configured to divide-by-2, 4, 5, 10, 20, 25, 50 or 100 * Two master reset inputs to clear each decade counter individually * Output capability: standard * ICC category: MSI GENERAL DESCRIPTION The 74HC/HCT390 are high-speed Si-gate CMOS devices and are pin compatible with low power Schottky TTL (LSTTL). They are specified in compliance with JEDEC standard no. 7A. The 74HC/HCT390 are dual 4-bit decade ripple counters divided into four separately clocked sections. The counters have two divide-by-2 sections and two divide-by-5 sections. These sections are normally used in a BCD QUICK REFERENCE DATA GND = 0 V; Tamb = 25 C; tr = tf = 6 ns
74HC/HCT390
decade or bi-quinary configuration, since they share a common master reset input (nMR). If the two master reset inputs (1MR and 2MR) are used to simultaneously clear all 8 bits of the counter, a number of counting configurations are possible within one package. The separate clocks (nCP0 and nCP1 ) of each section allow ripple counter or frequency division applications of divide-by-2, 4, 5, 10, 20, 25, 50 or 100. Each section is triggered by the HIGH-to-LOW transition of the clock inputs (nCP0 and nCP1 ). For BCD decade operation, the nQ0 output is connected to the nCP1 input of, the divide-by-5 section. For bi-quinary decade operation, the nQ3 output is connected to the nCP0 input and nQ0 becomes the decade output. The master reset inputs (1MR and 2MR) are active HIGH asynchronous inputs to each decade counter which operates on the portion of the counter identified by the "1" and "2" prefixes in the pin configuration. A HIGH level on the nMR input overrides the clocks and sets the four outputs LOW.
TYPICAL SYMBOL tPHL/ tPLH PARAMETER propagation delay nCP0 to nQ0 nCP1 to nQ1 nCP1 to nQ2 nCP1 to nQ3 nMR to Qn fmax CI CPD Notes 1. CPD is used to determine the dynamic power dissipation (PD in W): PD = CPD x VCC2 x fi + (CL x VCC2 x fo) where: fi = input frequency in MHz fo = output frequency in MHz (CL x VCC2 x fo) = sum of outputs CL = output load capacitance in pF VCC = supply voltage in V 2. For HC the condition is VI = GND to VCC For HCT the condition is VI = GND to VCC -1.5 V maximum clock frequency nCP0, nCP1 input capacitance power dissipation capacitance per counter notes 1 and 2 CONDITIONS HC CL = 15 pF; VCC = 5 V 14 15 23 15 16 66 3.5 20 18 19 26 19 18 61 3.5 21 ns ns ns ns ns MHz pF pF HCT UNIT
December 1990
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Philips Semiconductors
Product specification
Dual decade ripple counter
ORDERING INFORMATION See "74HC/HCT/HCU/HCMOS Logic Package Information". PIN DESCRIPTION PIN NO. 1, 15 2, 14 3, 5, 6, 7 4, 12 8 13, 11, 10, 9 16 SYMBOL 1CP0, 2CP0 1MR, 2MR 1Q0 to 1Q3 1CP1, 2CP1 GND 2Q0 to 2Q3 VCC NAME AND FUNCTION
74HC/HCT390
clock input divide-by-2 section (HIGH-to-LOW, edge-triggered) asynchronous master reset inputs (active HIGH) flip-flop outputs clock input divide-by-5 section (HIGH-to-LOW, edge triggered) ground (0 V) flip-flop outputs positive supply voltage
Fig.1 Pin configuration.
Fig.2 Logic symbol.
Fig.3 IEC logic symbol.
December 1990
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Philips Semiconductors
Product specification
Dual decade ripple counter
BCD COUNT SEQUENCE FOR 1/2 THE "390" OUTPUTS COUNT Q0 0 1 2 3 4 5 6 7 8 9 Notes 1. Output Q0 connected to nCP1 with counter input on nCP0. H = HIGH voltage level L = LOW voltage level L H L H L H L H L H Q1 L L H H L L H H L L Q2 L L L L H H H H L L L L L L L L L L H H Note Q3 0 1 2 3 4 5 6 7 8 9 COUNT
74HC/HCT390
BI-QUINARY COUNT SEQUENCE FOR 1/2 THE "390" OUTPUTS Q0 L L L L L H H H H H Q1 L H L H L L H L H L Q2 L L H H L L L H H L L L L L H L L L L H Q3
1. Output Q3 connected to nCP0 with counter input on nCP1.
Fig.4 Functional diagram.
Fig.5 Logic diagram (one counter).
December 1990
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Philips Semiconductors
Product specification
Dual decade ripple counter
DC CHARACTERISTICS FOR 74HC For the DC characteristics see "74HC/HCT/HCU/HCMOS Logic Family Specifications". Output capability: standard ICC category: MSI AC CHARACTERISTICS FOR 74HC GND = 0 V; tr = tf = 6 ns; CL = 50 pF Tamb (C) 74HC SYMBOL PARAMETER +25 -40 to +85 -40 to +125 max. 220 44 38 235 47 40 315 63 54 235 47 40 250 50 43 110 22 19 120 24 20 130 26 22 110 22 19 4.0 20 24 ns
74HC/HCT390
TEST CONDITIONS UNIT V WAVEFORMS CC (V) 2.0 4.5 6.0 2.0 4.5 6.0 2.0 4.5 6.0 2.0 4.5 6.0 2.0 4.5 6.0 2.0 4.5 6.0 2.0 4.5 6.0 2.0 4.5 6.0 2.0 4.5 6.0 2.0 4.5 6.0 Fig.6
min. typ. max. min. max. min. tPHL/ tPLH propagation delay nCP0 to nQ0 propagation delay nCP1 to nQ1 propagation delay nCP1 to nQ2 propagation delay nCP1 to nQ3 propagation delay nMR to nQn output transition time 47 17 14 50 18 14 74 27 22 50 18 14 52 19 15 19 7 6 80 16 14 80 17 14 75 15 13 6.0 30 35 19 7 6 28 10 8 22 8 6 20 60 71 145 29 25 155 31 26 210 42 36 155 31 26 165 33 28 75 15 13 100 20 17 105 21 18 95 19 16 4.8 24 28 180 36 31 195 39 33 265 53 45 195 39 33 205 41 35 95 19 16
tPHL/ tPLH
ns
Fig.6
tPHL/ tPLH
ns
Fig.6
tPHL/ tPLH
ns
Fig.6
tPHL
ns
Fig.7
tTHL/ tTLH
ns
Fig.6
tW
clock pulse width nCP0, nCP1 master reset pulse width HIGH removal time nMR to nCPn maximum clock pulse frequency nCP0, nCP1
ns
Fig.6
tW
ns
Fig.7
trem
ns
Fig.7
fmax
MHz
Fig.6
December 1990
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Philips Semiconductors
Product specification
Dual decade ripple counter
DC CHARACTERISTICS FOR 74HCT For the DC characteristics see "74HC/HCT/HCU/HCMOS Logic Family Specifications". Output capability: standard ICC category: MSI Note to HCT types
74HC/HCT390
The value of additional quiescent supply current (ICC) for a unit load of 1 is given in the family specifications. To determine ICC per input, multiply this value by the unit load coefficient shown in the table below.
INPUT nCP0 nCP1, nMR
UNIT LOAD COEFFICIENT 0.45 0.60
AC CHARACTERISTICS FOR 74HCT GND = 0 V; tr = tf = 6 ns; CL = 50 pF Tamb (C) 74HCT SYMBOL PARAMETER +25 -40 to +85 -40 to +125 max. 51 57 77 57 54 22 27 26 22 18 ns ns ns ns ns ns ns ns ns MHz 4.5 4.5 4.5 4.5 4.5 4.5 4.5 4.5 4.5 4.5 Fig.6 Fig.6 Fig.6 Fig.6 Fig.7 Fig.6 Fig.6 Fig.7 Fig.7 Fig.6 UNIT V WAVEFORMS CC (V) TEST CONDITIONS
min. typ. max. min. max. min. tPHL/ tPLH tPHL/ tPLH tPHL/ tPLH tPHL/ tPLH tPHL tTHL/ tTLH tW tW trem fmax propagation delay nCP0 to nQ0 propagation delay nCP1 to nQ1 propagation delay nCP1 to nQ2 propagation delay nCP1 to nQ3 propagation delay nMR to nQn output transition time clock pulse width nCP0, nCP1 master reset pulse width HIGH removal time nMR to nCPn maximum clock pulse frequency nCP0, nCP1 18 17 15 27 21 22 30 22 21 7 8 10 8 55 34 38 51 38 36 15 23 21 19 22 43 48 64 48 45 19
December 1990
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Philips Semiconductors
Product specification
Dual decade ripple counter
AC WAVEFORMS
74HC/HCT390
(1) HC : VM = 50%; VI = GND to VCC. HCT : VM = 1.3 V; VI = GND to 3 V.
Fig.6
Waveforms showing the clock (nCPn) to output (nQn) propagation delays, the clock pulse width, the output transition times and the maximum clock frequency.
(1) HC : VM = 50%; VI = GND to VCC. HCT : VM = 1.3 V; VI = GND to 3 V.
Fig.7
Waveforms showing the master reset (nMR) pulse width, the master reset to output (nQn) propagation delays and the master reset to clock (nCPn) removal time.
PACKAGE OUTLINES See "74HC/HCT/HCU/HCMOS Logic Package Outlines".
December 1990
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