74ACT280M

® 74ACT280 9 BIT PARITY GENERATOR/CHECKER s s s s s s s s s HIGH SPEED: tPD = 4 ns (TYP.) at VCC = 5V LOW POWER DISSIPATION: ICC = 4 µA (MAX.) at TA = 25 oC COMPATIBLE WITH TTL OUTPUTS VIH = 2V (MIN), VIL = 0.8V (MAX) 50Ω TRANSMISSION LINE DRIVING CAPABILITY SYMMETRICAL OUTPUT IMPEDANCE: |IOH| = IOL = 24 mA (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 B M (Plastic Package) (Micro Package) ORDER CODES : 74ACT280B 74ACT280M 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. 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 easily 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. DESCRIPTION The AC280 is an advanced high-speed CMOS 9 BIT PARITY GENERATOR - CHECKER fabricated with sub-micron silicon gate and double-layer metal wiring C2MOS technology. It is ideal for low power applications mantaining high speed operation similar to eqivalent Bipolar Schottky TTL. It is composed of nine data inputs (A to I) and odd/even parity outputs (ΣODD and ΣEVEN). The PIN CONNECTION AND IEC LOGIC SYMBOLS December 1998 1/8 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 ΣEVEN ΣODD A to I NAME AND FUNCT ION Parity Outputs Data Inputs NC GND VCC No Connection Ground (0V) Positive Supply Voltage TRUTH TABLE NUMBER OF INPUT A TRHU I T HAT ARE HIGH 0, 2, 4, 6, 8 1, 3, 5, 7, 9 ΣEVEN H L OUTPUT Σ ODD L H LOGIC DIAGRAM 2/8 74ACT280 ABSOLUTE MAXIMUM RATINGS Symbol VCC VI VO IIK IOK IO Tstg TL Supply Voltage DC Input Voltage DC Output Voltage DC Input Diode Current DC Output Diode Current DC Output Current Storage Temperature Lead Temperature (10 sec) Parameter Value -0.5 to +7 -0.5 to VCC + 0.5 -0.5 to VCC + 0.5 ± 20 ± 20 ± 50 ± 200 -65 to +150 300 Unit V V V mA mA mA mA o o ICC or IGND DC VCC or Ground Current C C Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these condition is not implied. RECOMMENDED OPERATING CONDITIONS Symbol VCC VI VO Top dt/dv Supply Voltage Input Voltage Output Voltage Operating Temperature: Input Rise and Fall Time VCC = 4.5 to 5.5V (note 1) Parameter Value 4.5 to 5.5 0 to VCC 0 to VCC -40 to +85 8 Unit V V V o C ns/V 1) VIN from 0.8 V to 2.0 V DC SPECIFICATIONS Symb ol Parameter V CC (V) VIH VIL VOH High Level Input Voltage Low Level Input Voltage High Level Output Voltage 4.5 5.5 4.5 5.5 4.5 5.5 4.5 5.5 VOL Low Level Output Voltage 4.5 5.5 4.5 5.5 II ICCT ICC IOLD IOHD Input Leakage Current Max ICC /Input Quiescent Supply Current Dynamic Output Current (note 1, 2) 5.5 5.5 5.5 5.5 V I (* ) = V IH or V IL VO = 0.1 V or VCC - 0.1 V VO = 0.1 V or VCC - 0.1 V V I (* ) = V IH or V IL IO=-50 µA IO=-50 µA IO=-24 mA IO=-24 mA IO=50 µA IO=50 mA IO=24 mA IO=24 mA VI = VCC or GND VI = VCC -2.1 V VI = VCC or GND VOLD = 1.65 V max VOHD = 3.85 V min 0.6 4 4.4 5.4 3.86 4.86 0.001 0.001 0.1 0.1 0.36 0.36 ±0.1 Test Co nditions o Valu e T A = 25 C Min. 2.0 2.0 T yp. 1.5 1.5 1.5 1.5 4.49 5.49 0.8 0.8 4.4 5.4 3.76 4.76 0.1 0.1 0.44 0.44 ±1 1.5 40 75 -75 Max. -40 to 85 C Min. 2.0 2.0 0.8 0.8 Max. o Un it V V V V µA mA µA mA mA 1) Maximum test duration 2ms, one output loaded attime 2) Incident wave switching is guaranteed on transmission lines with impedances as low as 50 Ω. 3/8 74ACT280 AC ELECTRICAL CHARACTERISTICS (CL = 50 pF, RL = 500 Ω, Input tr = tf =3 ns) Symb ol Parameter V CC (V) tPLH tPHL Propagation Delay Time (Input - Σ ODD, ΣEVEN) 5.0(*) T est Con ditio n Valu e T A = 25 oC -40 to 85 o C Min. T yp. Max. Min. Max. 3.0 8.5 13.0 2.0 14.5 Un it ns (*) Voltage range is 5V ± 0.5V CAPACITIVE CHARACTERISTICS Symb ol Parameter V CC (V) C IN CPD Input Capacitance Power Dissipation Capacitance (note 1) 5.0 5.0 Test Co nditions o Valu e T A = 25 C Min. T yp. 4 75 Max. -40 to 85 C Min. Max. o Un it pF pF 1) CPD isdefined as the value of the IC’sinternal equivalent capacitance which is calculated fromthe operating current consumption without load. (Referto Test Circuit).Average operating current can be obtained by the following equation. ICC(opr) = CPD • VCC • fIN + ICC TEST CIRCUIT CL = 50 pF or equivalent (includes jigand probe capacitance) RL = R1 = 500Ω orequivalent RT = ZOUT of pulse generator (typically 50Ω) 4/8 74ACT280 WAVEFORM: PROPAGATION DELAYS (f=1MHz; 50% duty cycle) 5/8 74ACT280 Plastic DIP-14 MECHANICAL DATA mm MIN. a1 B b b1 D E e e3 F I L Z 1.27 3.3 2.54 0.050 8.5 2.54 15.24 7.1 5.1 0.130 0.100 0.51 1.39 0.5 0.25 20 0.335 0.100 0.600 0.280 0.201 1.65 TYP. MAX. MIN. 0.020 0.055 0.020 0.010 0.787 0.065 inch TYP. MAX. DIM. P001A 6/8 74ACT280 SO-14 MECHANICAL DATA DIM. MIN. A a1 a2 b b1 C c1 D E e e3 F G L M S 3.8 4.6 0.5 8.55 5.8 1.27 7.62 4.0 5.3 1.27 0.68 8 (max.) 0.149 0.181 0.019 8.75 6.2 0.35 0.19 0.5 45 (typ.) 0.336 0.228 0.050 0.300 0.157 0.208 0.050 0.026 0.344 0.244 0.1 mm TYP. MAX. 1.75 0.2 1.65 0.46 0.25 0.013 0.007 0.019 0.003 MIN. inch TYP. MAX. 0.068 0.007 0.064 0.018 0.010 P013G 7/8 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 infringement of patents or other rights 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. Specification mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. 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