PI74FCT521T 8-BIT IDENTITY COMPARATOR 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 PI74FCT521T 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 Fast CMOS 8-Bit Identity Comparator Product Features: • PI74FCT521T is pin compatible with bipolar FAST™ Series at a higher speed and lower power consumption • TTL input and output levels • Extremely low static power • Hysteresis on all inputs • Industrial operating temperature range: –40°C to +85°C • Packages available: – 20-pin 173 mil wide plastic TSSOP (L) – 20-pin 300 mil wide plastic DIP (P) – 20-pin 150 mil wide plastic QSOP (Q) – 20-pin 150 mil wide plastic TQSOP (R) – 20-pin 300 mil wide plastic SOIC (S) Product Description: Pericom Semiconductor’s PI74FCT series of logic circuits are produced in the Company’s advanced 0.8 micron CMOS technology, achieving industry leading speed grades. The PI74FCT521T is an 8-bit identity comparator. When two words of up to eight bits are compared, a bit-for-bit match of the two words provides a LOW output. The comparison can be extended over multiple words by the expansion input. The expansion input IA=B also serves as an active LOW enable input. Logic Block Diagram A0 B0 A1 B1 A2 B2 A3 B3 OA=B A4 B4 A5 B5 A6 B6 A7 B7 I A=B 1 PS2019A 03/11/96 PI74FCT521T 8-BIT IDENTITY COMPARATOR 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 Truth Table(1) Product Pin Description Pin Name IA=B OA=B A0–A7 B0–B7 GND VCC Inputs Description Expansion or Enable Input (Active LOW) Identity Output (Active LOW) Word A Inputs Word B Inputs Ground Power IA=B L L H H 1 20 2 19 3 20-PIN 18 L20 17 4 P20 16 5 Q20 6 15 R20 7 14 S20 8 13 9 12 10 11 Output OA=B L H H H NOTE: 1. H = High Voltage Level L = Low Voltage Level, *A0 = B0, A1 = B1, A2 = B2, etc. Product Pin Configuration IA=B A0 B0 A1 B1 A2 B2 A3 B3 GND A, B A = B* A≠B A = B* A≠B Vcc OA=B B7 A7 B6 A6 B5 A5 B4 A4 2 PS2019A 03/11/96 PI74FCT521T 8-BIT IDENTITY COMPARATOR 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 Maximum Ratings (Above which the useful life may be impaired. For user guidelines, not tested.) Storage Temperature .................................................................... –65°C to +150°C Ambient Temperature with Power Applied .....................................-40°C to +85°C Supply Voltage to Ground Potential (Inputs & Vcc Only) .............. –0.5V to +7.0V Supply Voltage to Ground Potential (Outputs & D/O Only) ........... –0.5V to +7.0V DC Input Voltage ............................................................................ –0.5V to +7.0V DC Output Current ..................................................................................... 120 mA Power Dissipation ..........................................................................................0.5W Note: Stresses greater than those listed under MAXIMUM RATINGS may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect reliability. DC Electrical Characteristics (Over the Operating Range, TA = –40°C to +85°C, VCC = 5V ± 5%) Test Conditions(1) Parameters Description Min. Typ(2) 2.4 3.0 VOH Output HIGH Voltage VCC = Min., VIN = VIH or VIL IOH = –15.0 mA VOL Output LOW Current VCC = Min., VIN = VIH or VIL IOL = 48 mA VIH Input HIGH Voltage Guaranteed Logic HIGH Level VIL Input LOW Voltage Guaranteed Logic LOW Level IIH Input HIGH Current VCC = Max. IIL Input LOW Current VCC = Max. VIK Clamp Diode Voltage VCC = Min., IIN = –18 mA IOS Short Circuit Current VCC = Max.(3), VOUT = GND –60 –120 IOFF Power Down Disable VCC = GND, VOUT = 4.5V — — VH Input Hysteresis 0.3 Max. Units V 0.50 2.0 V V 0.8 V VIN = VCC 1 µA VIN = GND –1 µA –1.2 V –0.7 mA 100 200 µA mV Capacitance (TA = 25°C, f = 1 MHz) Parameters(4) Description Test Conditions Typ Max. Units CIN Input Capacitance VIN = 0V 6 10 pF COUT Output Capacitance VOUT = 0V 8 12 pF Notes: 1. For Max. or Min. conditions, use appropriate value specified under Electrical Characteristics for the applicable device type. 2. Typical values are at Vcc = 5.0V, +25°C ambient and maximum loading. 3. Not more than one output should be shorted at one time. Duration of the test should not exceed one second. 4. This parameter is determined by device characterization but is not production tested. 3 PS2019A 03/11/96 PI74FCT521T 8-BIT IDENTITY COMPARATOR 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 Power Supply Characteristics Test Conditions(1) Parameters Description Min. Typ(2) Max. Units ICC Quiescent Power Supply Current VCC = Max. VIN = GND or VCC 0.1 500 µA ∆ICC Supply Current per Input @ TTL HIGH VCC = Max. VIN = 3.4V(3) 0.5 2.0 mA ICCD Supply Current per Input per MHz(4) VCC = Max., Outputs Open One Input Toggling 50% Duty Cycle VIN = VCC VIN = GND 0.15 0.25 mA/ MHz IC Total Power Supply Current(6) VCC = Max., Outputs Open fI = 10 MHZ 50% Duty Cycle One Bit Toggling VIN = VCC VIN = GND VIN = 3.4V VIN = GND 1.5 3.5(5) mA 1.8 4.5(5) Notes: 1. For conditions shown as Max. or Min., use appropriate value specified under Electrical Characteristics for the applicable device. 2. Typical values are at Vcc = 5.0V, +25°C ambient. 3. Per TTL driven input (VIN = 3.4V); all other inputs at Vcc or GND. 4. This parameter is not directly testable, but is derived for use in Total Power Supply Calculations. 5. Values for these conditions are examples of the Icc formula. These limits are guaranteed but not tested. 6. IC =IQUIESCENT + IINPUTS + IDYNAMIC IC = ICC + ∆ICC DHNT + ICCD (fCP/2 + fINI) ICC = Quiescent Current ∆ICC = Power Supply Current for a TTL High Input (VIN = 3.4V) DH = Duty Cycle for TTL Inputs High NT = Number of TTL Inputs at DH ICCD = Dynamic Current Caused by an Input Transition Pair (HLH or LHL) fCP = Clock Frequency for Register Devices (Zero for Non-Register Devices) fI = Input Frequency NI = Number of Inputs at fI All currents are in milliamps and all frequencies are in megahertz. Switching Characteristics over Operating Range 521T 521AT Com. Parameters tPLH tPHL tPLH tPHL 521BT Com. 521CT Com. Com. 521DT Com. Description Conditions(1) Min Max Min Max Min Max Min Max Min Max Unit Propagation Delay AN or BN to OA=B Propagation Delay IA=B to OA=B CL = 50 pF RL = 500Ω 1.5 10.0 1.5 7.2 1.5 5.5 1.5 4.5 1.5 4.2 ns 1.5 9.0 1.5 6.0 1.5 4.6 1.5 4.1 1.5 3.8 ns Notes: 1. See Test Circuit and Waveforms 2. Minimum limits are guaranteed but not tested on Propagation Delays. Pericom Semiconductor Corporation 2380 Bering Drive • San Jose, CA 95131 • 1-800-435-2336 • Fax (408) 435-1100 • http://www.pericom.com 4 PS2019A 03/11/96