74ACT280 9 BIT PARITY GENERATOR/CHECKER ■ ■ ■ ■ ■ ■ ■ ■ ■ HIGH SPEED: tPD = 7ns (TYP.) at VCC = 5V LOW POWER DISSIPATION: ICC = 4µA(MAX.) at TA=25°C COMPATIBLE WITH TTL OUTPUTS VIH = 2V (MIN.), VIL = 0.8V (MAX.) 50Ω TRANSMISSION LINE DRIVING CAPABILITY SYMMETRICAL OUTPUT IMPEDANCE: |IOH| = IOL = 24mA (MIN) BALANCED PROPAGATION DELAYS: tPLH ≅ tPHL OPERATING VOLTAGE RANGE: VCC (OPR) = 4.5V to 5.5V PIN AND FUNCTION COMPATIBLE WITH 74 SERIES 280 IMPROVED LATCH-UP IMMUNITY DESCRIPTION The 74ACT280 is an advanced high-speed CMOS 9 BIT PARITY GENERATOR CHECKER fabricated with sub-micron silicon gate and double-layer metal wiring C2MOS tecnology. It is composed of nine data inputs (A to I) and odd/ even parity outputs (ΣODD and ΣEVEN). The nine data inputs control the output conditions. When the number of high level input is odd, ΣODD output is kept high and ΣEVEN output low. DIP SOP TSSOP ORDER CODES PACKAGE TUBE DIP SOP TSSOP 74ACT280B 74ACT280M T&R 74ACT280MTR 74ACT280TTR Conservely, when the output is even, ΣEVEN output is kept high and ΣODD low. The IC generates either odd or even parity making it flexible application. The word-length capability is easly expanded by cascading. The device is designed to interface directly High Speed CMOS systems with TTL, NMOS and CMOS output voltage levels. All inputs and outputs are equipped with protection circuits against static discharge, giving them 2KV ESD immunity and transient excess voltage. PIN CONNECTION AND IEC LOGIC SYMBOLS April 2001 1/9 74ACT280 INPUT AND OUTPUT EQUIVALENT CIRCUIT PIN DESCRIPTION PIN No 5, 6 8, 9, 10, 11, 12, 13, 1, 2, 4 3 7 14 SYMBOL NAME AND FUNCTION ΣEVEN Parity Outputs ΣODD A to I Data Inputs NC GND VCC No Connection Ground (0V) Positive Supply Voltage TRUTH TABLE OUTPUT NUMBER OF INPUTS A - I THAT ARE HIGH 0, 2, 4, 6, 8 1, 3, 5, 7, 9 LOGIC DIAGRAM 2/9 ΣEVEN ΣODD H L L H 74ACT280 ABSOLUTE MAXIMUM RATINGS Symbol V CC Parameter Supply Voltage Value Unit -0.5 to +7 V -0.5 to VCC + 0.5 -0.5 to VCC + 0.5 V DC Input Diode Current ± 20 mA IOK DC Output Diode Current ± 20 mA IO DC Output Current VI DC Input Voltage VO DC Output Voltage IIK ICC or IGND DC VCC or Ground Current Tstg Storage Temperature TL Lead Temperature (10 sec) V ± 50 mA ± 200 mA -65 to +150 °C 300 °C Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these conditions is not implied. RECOMMENDED OPERATING CONDITIONS Symbol Value Unit Supply Voltage 4.5 to 5.5 V VI Input Voltage 0 to VCC V VO Output Voltage 0 to VCC V Top Operating Temperature -55 to 125 °C 8 ns/V V CC dt/dv Parameter Input Rise and Fall Time VCC = 4.5 to 5.5V (note 1) 1) VIN from 0.8V to 2.0V 3/9 74ACT280 DC SPECIFICATIONS Test Condition Symbol Parameter TA = 25°C VCC (V) High Level Input Voltage 4.5 5.5 VO = 0.1 V or VCC-0.1V V IL Low Level Input Voltage 4.5 5.5 VO = 0.1 V or VCC-0.1V VOH High Level Output Voltage VIH VOL II ICCT Low Level Output Voltage Input Leakage Current Max ICC/Input Max. -40 to 85°C -55 to 125°C Min. Min. Min. Typ. 2.0 1.5 2.0 2.0 1.5 2.0 1.5 1.5 0.8 0.8 Max. Unit Max. 2.0 2.0 0.8 0.8 V 0.8 0.8 4.5 IO=-50 µA 4.4 4.49 4.4 4.4 5.5 IO=-50 µA 5.4 5.49 5.4 5.4 4.5 IO =-24 mA 3.86 3.76 3.7 5.5 IO =-24 mA 4.86 4.76 4.7 4.5 IO=50 µA 0.001 0.1 0.1 0.1 5.5 IO=50 µA 0.001 0.1 0.1 0.1 V V 4.5 IO =24 mA 0.36 0.44 0.5 5.5 IO =24 mA 0.36 0.44 0.5 5.5 VI = VCC or GND ± 0.1 ±1 ±1 µA 5.5 VI = VCC - 2.1V 1.5 1.6 mA VI = VCC or GND 40 80 µA ICC Quiescent Supply Current 5.5 IOLD Dynamic Output Current (note 1, 2) 5.5 IOHD Value 0.6 4 VOLD = 1.65 V max 75 50 mA VOHD = 3.85 V min -75 -50 mA 1) Maximum test duration 2ms, one output loaded at time 2) Incident wave switching is guaranteed on transmission lines with impedances as low as 50Ω AC ELECTRICAL CHARACTERISTICS (CL = 50 pF, RL = 500 Ω, Input tr = tf = 3ns) Test Condition Symbol Parameter tPLH tPHL Propagation Delay Time (Input ΣODD, ΣEVEN) Value TA = 25°C VCC (V) 5.0 (*) -40 to 85°C -55 to 125°C Min. Typ. Max. Min. Max. Min. Max. 3.0 7.0 13.0 2.0 14.5 2.0 14.5 Unit ns (*) Voltage range is 5.0V ± 0.5V CAPACITIVE CHARACTERISTICS Test Condition Symbol Parameter TA = 25°C VCC (V) CIN Input Capacitance 5.0 C PD Power Dissipation Capacitance (note 1) 5.0 Value Min. fIN = 10MHz Typ. Max. -40 to 85°C -55 to 125°C Min. Min. Max. Unit Max. 4 pF 67 pF 1) CPD is defined as the value of the IC’s internal equivalent capacitance which is calculated from the operating current consumption without load. (Refer to Test Circuit). Average operating current can be obtained by the following equation. ICC(opr) = CPD x VCC x fIN + ICC/n (per circuit) 4/9 74ACT280 TEST CIRCUIT C L = 50pF or equivalent (includes jig and probe capacitance) R L = R1 = 500Ω or equivalent R T = ZOUT of pulse generator (typically 50Ω) WAVEFORM: PROPAGATION DELAYS (f=1MHz; 50% duty cycle) 5/9 74ACT280 Plastic DIP-14 MECHANICAL DATA mm DIM. MIN. a1 0.51 B 1.39 TYP. inch MAX. MIN. TYP. MAX. 0.020 1.65 0.055 0.065 b 0.5 0.020 b1 0.25 0.010 D 20 0.787 E 8.5 0.335 e 2.54 0.100 e3 15.24 0.600 F 7.1 0.280 I 5.1 0.201 L Z 3.3 1.27 0.130 2.54 0.050 0.100 P001A 6/9 74ACT280 SO-14 MECHANICAL DATA mm DIM. MIN. TYP. A a1 inch MAX. MIN. TYP. 1.75 0.1 0.2 a2 MAX. 0.068 0.003 0.007 1.65 0.064 b 0.35 0.46 0.013 0.018 b1 0.19 0.25 0.007 0.010 C 0.5 0.019 c1 45 (typ.) D 8.55 8.75 0.336 0.344 E 5.8 6.2 0.228 0.244 e 1.27 0.050 e3 7.62 0.300 F 3.8 G 4.6 5.3 0.181 0.208 L 0.5 1.27 0.019 0.050 M S 4.0 0.149 0.68 0.157 0.026 8 (max.) P013G 7/9 74ACT280 TSSOP14 MECHANICAL DATA mm DIM. MIN. inch TYP. A MAX. MIN. MAX. 1.1 0.433 A1 0.05 0.10 0.15 0.002 0.004 0.006 A2 0.85 0.9 0.95 0.335 0.354 0.374 b 0.19 0.30 0.0075 0.0118 c 0.09 0.20 0.0035 0.0079 D 4.9 5 5.1 0.193 0.197 0.201 E 6.25 6.4 6.5 0.246 0.252 0.256 E1 4.3 4.4 4.48 0.169 0.173 0.176 e 0.65 BSC 0.0256 BSC K 0o 4o 8o 0o 4o 8o L 0.50 0.60 0.70 0.020 0.024 0.028 A A2 A1 b e K c E1 PIN 1 IDENTIFICATION 1 L E D 8/9 TYP. 74ACT280 Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences of use of such information nor for any infringe ment of patents or other righ ts of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications mentioned in this pub lication are subject to change without notice. Thi s pub lication supersedes and replaces all information previously supplied. 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