14-STAGE BINARY RIPPLE COUNTER The MC74AC4020 consists of 14 master-slave flip-flops with 12 stages brought out to pins. The output of each flip-flop feeds the next and the frequency at each output is half that of the preceding one. The state of the counter advances on the negative-going edge of the Clock input. Reset is asynchronous and active-high. State changes of the Q outputs do not occur simultaneously because of internal ripple delays. Therefore, decoded output signals are subject to decoding spikes and may have to be gated with the Clock of the MC74AC4020 for some designs. • • • • 140 MHz Typ. Clock Outputs Source/Sink 24 mA Operating Voltage Range: 2.0 to 6.0 V High Noise Immunity VCC 16 Q11 Q10 Q8 Q9 15 14 13 12 RESET CLK 11 N SUFFIX CASE 648-08 PLASTIC Q1 10 9 1 2 3 4 5 6 7 8 Q12 Q13 Q14 Q6 Q5 Q7 Q4 GND D SUFFIX CASE 751B-05 PLASTIC LOGIC DIAGRAM FUNCTION TABLE Clock X Reset Output State L No Change 9 7 L Advance to next state 5 H All Outputs are low 4 CLOCK 10 6 13 12 14 15 1 2 3 RESET 11 PIN 16 = VCC PIN 8 = GND FACT DATA 5-1 Q1 Q4 Q5 Q6 Q7 Q8 Q9 Q10 Q11 Q12 Q13 Q14 MC74AC4020 MAXIMUM RATINGS* Symbol Parameter Value Unit –0.5 to +7.0 V V VCC DC Supply Voltage (Referenced to GND) Vin DC Input Voltage (Referenced to GND) –0.5 to VCC +0.5 Vout DC Output Voltage (Referenced to GND) –0.5 to VCC +0.5 V Iin DC Input Current, per Pin ±20 mA Iout DC Output Current, per Pin ±50 mA ICC DC VCC or GND Current per Output Pin ±50 mA PD Power Dissipation in Still Air Plastic** SOIC Package** 750 500 mW Tstg Storage Temperature TL Lead Temperature, 1 mm from Case for 10 seconds (Plastic DIP or SOIC Package) –65 to +150 °C 260 °C * Maximum Ratings are those values beyond which damage to the device may occur. ** Derating: Plastic DIP: – 10mW/°C from 65°C to 125°C SOIC Package: –7.0 mW/°C from 65°C to 125°C RECOMMENDED OPERATING CONDITIONS Symbol Parameter Min Max Unit V VCC DC Supply Voltage (Referenced to GND) 2.0 6.0 Vin/Vout Input Voltage, Output Voltage (Ref. to GND) 0 VCC TA Operating Temperature, All Package Types –40 +85 °C tr/tf Input Rise/Fall Time (Figure 1) 0 0 0 150 40 25 ns/V VCC = 3.0 V VCC = 4.5 V VCC = 5.5 V FACT DATA 5-2 MC74AC4020 DC CHARACTERISTICS (unless otherwise specified) Symbol Parameter Value Unit ICC Maximum Quiescent Supply Voltage 80 µA Vin = VCC or GND VCC = 5.5 V, TA = Worst Case ICC Maximum Quiescent Supply Current 8.0 µA Vin = VCC or GND VCC = 5.5 V, TA = 25°C DC CHARACTERISTICS Symbol Parameter VCC (V) 74AC 74AC TA = +25°C TA = –40°C to +85°C Typ VIH VIL VOH Guaranteed Limits 3.0 4.5 5.5 2.1 3.15 3.85 2.1 3.15 3.85 V VOUT = 0.1 V or VCC – 0.1 V Maximum Low Level Input Voltage 3.0 4.5 5.5 0.9 1.35 1.65 0.9 1.35 1.65 V VOUT = 0.1 V or VCC – 0.1 V Minimum High Level Output Voltage 3.0 4.5 5.5 2.9 4.4 5.4 2.9 4.4 5.4 V 2.56 3.86 4.86 2.46 3.76 4.76 0.1 0.1 0.1 0.1 0.1 0.1 3.0 4.5 5.5 0.36 0.36 0.36 0.44 0.44 0.44 5.5 ±0.1 Maximum Low Level Output Voltage IIN Maximum Input Leakage Current IOLD Minimum Dynamic Output Current** IOHD Conditions Minimum High Level Input Voltage 2.99 4.49 5.49 3.0 4.5 5.5 VOL Unit 3.0 4.5 5.5 0.002 0.001 0.001 IOUT = –50 µA V *VIN = VIL or VIH –12 mA IOH –24 mA –24 mA IOUT = 50 µA V V *VIN = VIL or VIH 12 mA IOL 24 mA 24 mA ±1.0 µA VI = VCC, GND 5.5 75 mA VOLD = 1.65 V Max 5.5 –75 mA VOHD = 3.85 V Min * All outputs loaded; thresholds on input associated with output under test. ** Maximum test duration 2.0 ms, one output loaded at a time. FACT DATA 5-3 MC74AC4020 AC CHARACTERISTICS (For Figures and Waveforms — See Section 3) Symbol Parameter VCC* (V) 74AC 74AC TA = +25°C CL = 50 pF TA = –40°C to +85°C CL = 50 pF Min Typ 0 140 Max Min Unit Max fmax Maximum Clock Frequency 3.3 5.0 110 130 100 120 tPLH Propagation Delay CP to Q1 3.3 5.0 2.0 2.0 11 8.0 2.0 2.0 14 10 ns tPHL Propagation Delay CP to Q1 3.3 5.0 2.0 2.0 11 8.0 2.0 2.0 14 10 ns tPLH Propagation Delay CP to Q4 3.3 5.0 2.0 2.0 18 13 2.0 2.0 21 16 ns tPHL Propagation Delay CP to Q4 3.3 5.0 2.0 2.0 18 13 2.0 2.0 21 16 ns tPHL Propagation Delay Reset to any Q 3.3 5.0 3.0 3.0 12 10 3.0 3.0 15 12 ns tPHL Propagation Delay On to Qn +1 3.3 5.0 0 0 5.5 3.5 0 0 6.5 4.5 ns tPHL Propagation Delay On to Qn +1 3.3 5.0 0 0 5.5 3.5 0 0 6.5 4.5 ns trec MR to CP Recovery Time 3.3 5.0 0 0 –2.5 –1.5 0 0 ns tw CP Minimum Pulse Width Clock Pin 3.3 5.0 4.0 3.0 3.5 2.5 4.5 3.5 ns tw MR Minimum Pulse Width Master Reset 3.3 5.0 4.0 3.0 3.5 2.5 4.5 3.5 ns MHz * Voltage Range 3.3 V is 3.3 V ±0.3 V. Voltage Range 5.0 V is 5.0 V ±0.5 V. CAPACITANCE Symbol Parameter Value Typ Unit Test Conditions CIN Input Capacitance 4.5 pF VCC = 5.0 V CPD Power Dissipation Capacitance 50 pF VCC = 5.0 V FACT DATA 5-4 Fig. No. MC74AC4020 OUTLINE DIMENSIONS N SUFFIX PLASTIC DIP PACKAGE CASE 648–08 ISSUE R –A– 16 9 1 8 NOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 2. CONTROLLING DIMENSION: INCH. 3. DIMENSION L TO CENTER OF LEADS WHEN FORMED PARALLEL. 4. DIMENSION B DOES NOT INCLUDE MOLD FLASH. 5. ROUNDED CORNERS OPTIONAL. B F C DIM A B C D F G H J K L M S L S SEATING PLANE –T– K H G D M J 16 PL 0.25 (0.010) T A M M D SUFFIX PLASTIC SOIC PACKAGE CASE 751B–05 ISSUE J –A– 16 1 P 8 PL 0.25 (0.010) 8 M B S G R K F X 45 _ C –T– SEATING PLANE J M D 16 PL 0.25 (0.010) M T B S A S MILLIMETERS MIN MAX 18.80 19.55 6.35 6.85 3.69 4.44 0.39 0.53 1.02 1.77 2.54 BSC 1.27 BSC 0.21 0.38 2.80 3.30 7.50 7.74 0_ 10 _ 0.51 1.01 NOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 2. CONTROLLING DIMENSION: MILLIMETER. 3. DIMENSIONS A AND B DO NOT INCLUDE MOLD PROTRUSION. 4. MAXIMUM MOLD PROTRUSION 0.15 (0.006) PER SIDE. 5. DIMENSION D DOES NOT INCLUDE DAMBAR PROTRUSION. ALLOWABLE DAMBAR PROTRUSION SHALL BE 0.127 (0.005) TOTAL IN EXCESS OF THE D DIMENSION AT MAXIMUM MATERIAL CONDITION. 9 –B– INCHES MIN MAX 0.740 0.770 0.250 0.270 0.145 0.175 0.015 0.021 0.040 0.70 0.100 BSC 0.050 BSC 0.008 0.015 0.110 0.130 0.295 0.305 0_ 10 _ 0.020 0.040 DIM A B C D F G J K M P R MILLIMETERS MIN MAX 9.80 10.00 3.80 4.00 1.35 1.75 0.35 0.49 0.40 1.25 1.27 BSC 0.19 0.25 0.10 0.25 0_ 7_ 5.80 6.20 0.25 0.50 INCHES MIN MAX 0.386 0.393 0.150 0.157 0.054 0.068 0.014 0.019 0.016 0.049 0.050 BSC 0.008 0.009 0.004 0.009 0_ 7_ 0.229 0.244 0.010 0.019 Motorola reserves the right to make changes without further notice to any products herein. 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Box 20912; Phoenix, Arizona 85036. 1–800–441–2447 JAPAN: Nippon Motorola Ltd.; Tatsumi–SPD–JLDC, Toshikatsu Otsuki, 6F Seibu–Butsuryu–Center, 3–14–2 Tatsumi Koto–Ku, Tokyo 135, Japan. 03–3521–8315 MFAX: [email protected] –TOUCHTONE (602) 244–6609 INTERNET: http://Design–NET.com HONG KONG: Motorola Semiconductors H.K. Ltd.; 8B Tai Ping Industrial Park, 51 Ting Kok Road, Tai Po, N.T., Hong Kong. 852–26629298 ◊ FACT DATA 5-5 *MC74AC4020/D* MC74AC4020/D