MC74F579 8-BIT BIDIRECTIONAL BINARY COUNTER (3-STATE) The MC74F579 is a fully synchronous 8-stage up/down counter with multiplexed 3-state I/O ports for bus-oriented applications. It features a preset capability for programmable operation, carry look-ahead for easy cascading and a U/D input to control the direction of counting. All state changes, except for the case of asynchronous reset, are initiated by the rising edge of the clock. TC output is not recommended for use as a clock or asynchronous reset due to the possibility of decoding spikes. • • • • • • • • • • • Multiplexed 3-State I/O Ports For Bus-oriented Applications Built-In Cascading Carry Capability Count Frequency 115 MHz Typ Supply Current 100 mA Typ Fully Synchronous Operation U/D Pin to Control Direction of Counting Separate Pins for Master Reset and Synchronous Reset Center Power Pins to Reduce Effects of Package Inductance See F269 for 24-Pin Separate I/O Port Version See F779 for 16-Pin Version ESD Protection > 4000 Volts 8-BIT BIDIRECTIONAL BINARY COUNTER (3-STATE) FAST SCHOTTKY TTL 20 1 SR CEP CET VCC TC 20 19 18 17 16 1 U/D PE CS OE 14 13 12 11 15 N SUFFIX PLASTIC CASE 738-03 20 PIN ASSIGNMENT MR J SUFFIX CERAMIC CASE 732-03 DW SUFFIX SOIC CASE 751D-03 20 1 ORDERING INFORMATION 8 9 10 1 2 3 4 5 6 7 CP I/O0 I/O1 I/O2 I/O3 GND I/O4 I/O5 I/O6 I/O7 MC74FXXXJ Ceramic MC74FXXXN Plastic MC74FXXXDW SOIC LOGIC SYMBOL 1 18 17 CP CEP CET 11 OE 13 12 20 19 14 PE CS MR SR U/D TC 15 I/O0 I/O1 I/O2 I/O3 I/O4 I/O5 I/O6 I/O7 2 3 4 5 6 7 8 9 GUARANTEED OPERATING RANGES Symbol VCC TA Parameter Supply Voltage Operating Ambient Temperature Range IOH Output Current — High IOL Output Current — Low Typ Max Unit 4.5 5.0 5.5 V 0 25 70 °C TC –1.0 I/On TC –3.0 I/On 24 FAST AND LS TTL DATA 4-229 Min 20 mA mA MC74F579 FUNCTION TABLE MR SR CS PE CEP CET U/D OE CP Function X X H X X X X X X I/O0 to I/O7 in Hi-Z (PE disabled) X X L H X X X H X I/O0 to I/O7 in Hi-Z X X L H X X X L X Flip-Flop outputs appear on I/O lines L X X X X X X X X Asynchronous reset for all flip-flops H L X X X X X X ↑ Synchronous reset for all flip-flops H H L L X X X X ↑ Parallel load all flip-flops H H (not LL) H X X X ↑ Hold H H (not LL) X H X X ↑ Hold (TC held high) H H (not LL) L L H X ↑ Count up H H (not LL) L L L X ↑ Count down H = High voltage level L = Low voltage level X = Don’t care ↑ = Low-to-High clock transition (not LL) = CS and PE should never both be low voltage at the same time DC CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE (unless otherwise specified) 74F Symbol Parameter Unit Min Typ (2) Max 2.5 TC VOH V 2.7 3.4 2.4 3.3 Output HIGH Voltage I/On V 2.7 3.3 TC VOL Output LOW Voltage VIK Input Clamp Diode Voltage IIH 0.35 V I/On – 1.2 V I/On 1.0 mA others 100 I/On 70 others 20 Except I/On –0.6 Input HIGH Current Input LOW Current IOZH OFF-State Current High-Level Voltage Applied IOZL OFF-State Current Low-Level Voltage Applied IOS Output Short Circuit Current (Note 3) Total Supply Current (total) IOH = – 1.0 mA VIL = MAX VIH = MIN VCC = 4.5 V IOH = – 3.0 mA VIL = MAX VIH = MIN VCC = 4.5 V IOL = 20 mA VCC = 4.5 V VIL = MAX VIH = MIN IOL = 24 mA –0.73 IIL ICC 0.5 Test Conditions (Note 1) µA VCC = 5.5 V –150 ICCH 95 135 ICCL 105 145 ICCZ 105 150 VIN = 7.0 V VCC = 5.5 V, VIN = 2.7 V mA VCC = 5.5 V, VIN = 0.5 V VOUT = 2.7 V µA –80 VIN = 5.5 V µA VCC = 5.5 V –600 – 60 VCC = 4.75 V VCC = 4.5 V, IIN = – 18 mA 70 I/On VCC = 4.75 V VOUT = 0.5 V mA VCC = MAX, VOUT = 0 V mA VCC = MAX NOTES: 1. For conditions shown as MIN or MAX, use the appropriate value specified under guaranteed operating conditions for the applicable device type. 2. All typical values are at VCC = 5.0 V, TA = 25°C. 3. Not more than one output should be shorted at a time. For IOS testing, the use of high-speed test apparatus and/or sample-and-hold techniques are preferable in order to minimize internal heating and more accurately reflect operational values. Otherwise, prolonged shorting of a HIGH output may raise the chip temperature well above normal and thereby cause invalid readings in other parameter tests. In any sequence of parameter tests, IOS tests should be performed last. FAST AND LS TTL DATA 4-230 MC74F579 AC ELECTRICAL CHARACTERISTICS Symbol 74F 74F TA = + 25°C VCC = + 5.0 V CL = 50 pF TA = 0°C to + 70°C VCC = +5.0 V ± 10% CL = 50 pF Min Parameter Typ Max Min Max 80 Unit fMAX Maximum Clock Frequency 100 MHz tPLH tPHL Propagation Delay CP to I/On 5.0 5.0 10.5 10.5 5.0 5.0 11.5 11.5 ns tPLH tPHL Propagation Delay CP to TC 4.5 5.5 10 10 4.5 5.0 11 11 ns tPLH tPHL Propagation Delay U/D to TC 3.5 4.5 8.0 8.0 3.5 4.5 9.0 9.0 ns tPLH tPHL Propagation Delay CET to TC 3.5 3.5 7.0 8.0 3.5 3.5 8.5 8.5 ns tPHL Propagation Delay MR to I/On 5.0 10 5.0 11 ns tPZH tPZL Output Enable Time to HIGH or LOW Level CS, PE to I/On 4.5 6.5 10.5 10.5 4.5 6.0 11.5 11.5 ns tPHZ tPLZ Output Disable Time to HIGH or LOW Level CS, PE to I/On 3.0 4.0 7.5 9.5 3.0 4.0 9.0 11 ns tPZH tPZL Output Enable Time to HIGH or LOW Level OE to I/On 4.0 6.0 8.5 9.5 4.0 5.0 9.5 10.5 ns tPHZ tPLZ Output Disable Time to HIGH or LOW Level OE to I/On 1.0 2.5 6.0 7.0 1.0 2.5 6.5 8.0 ns Max Unit AC SETUP REQUIREMENTS Symbol Parameter Min 74F 74F TA = + 25°C VCC = + 5.0 V CL = 50 pF TA = 0°C to + 70°C VCC = +5.0 V ± 10% CL = 50 pF Typ Max Min Typ ts(H) ts(L) Setup Time, HIGH or LOW I/On to CP 3.0 3.0 4.0 4.0 ns th(H) th(L) Hold Time, HIGH or LOW I/On to CP 1.0 1.0 1.0 1.0 ns ts(H) ts(L) Setup Time, HIGH or LOW PE, SR or CS to CP 9.5 9.5 10 10 ns th(H) th(L) Hold Time, HIGH or LOW PE, SR or CS to CP 0 0 0 0 ns ts(H) ts(L) Setup Time, HIGH or LOW CET, CEP to CP 5.0 9.0 5.5 10.5 ns th(H) th(L) Hold Time, HIGH or LOW CET, CEP to CP 0 0 0 0 ns tw CP Pulse Width 4.5 6.0 ns tw(L) MR Pulse Width 3.5 4.5 ns trec MR Recovery Time 4.0 4.5 ns FAST AND LS TTL DATA 4-231 MC74F579 LOGIC DIAGRAM SR CPMR LOAD CONTROL PE CE OE I/O0 DETAIL A DETAIL A I/O1 DETAIL A I/O2 DETAIL A I/O3 DETAIL A I/O4 DETAIL A I/O5 DETAIL A I/O6 I/O7 U/D CEP DETAIL A DOWN UP CET TC TOGGLE CP MR DATA MR LOAD D CP Q Q Detail A FAST AND LS TTL DATA 4-232 Q Q