Data sheet acquired from Cypress Semiconductor Corporation. Data sheet modified to remove devices not offered. CY54/74FCT157T Quad 2-Input Multiplexer SCCS014 - May 1994 - Revised February 2000 Features Functional Description • Function, pinout, and drive compatible with FCT and F logic • FCT-C speed at 4.3 ns max. (Com’l), FCT-A speed at 5.0 ns max. (Com’l) • Reduced VOH (typically = 3.3V) versions of equivalent FCT functions • Edge-rate control circuitry for significantly improved noise characteristics • Power-off disable feature • Matched rise and fall times • Fully compatible with TTL input and output logic levels • ESD > 2000V • Extended commercial range of −40˚C to +85˚C • Sink current 64 mA (Com’l), 32 mA (Mil) Source current 32 mA (Com’l), 12 mA (Mil) The FCT157T is a quad two-input multiplexer that selects four bits of data from two sources under the control of a common data Select input (S). The Enable input (E) is Active LOW. When (E) is HIGH, all of the outputs (Y) are forced LOW regardless of all other input conditions. Moving data from two groups of registers to four common output buses is a common use of the FCT157T. The state of the Select input determines the particular register from which the data comes. It can also be used as a function generator. The device is useful for implementing highly irregular logic by generating any four of the sixteen different functions of two variables with one variable common. The FCT157T is a logic implementation of a four-pole, two-position switch where the position of the switch is determined by the logic levels supplied to the Select input. The outputs are designed with a power-off disable feature to allow for live insertion of boards. Logic Block Diagram, FCT157T I1a I0a I0b I1b I0c Pin Configurations I1c I0d I1d E S Yb NC 9 10 11 Yc I1c 12 13 GND I 1b I 0b NC Ya I 1a LCC Top View 8 7 6 5 4 SOIC/QSOP Top View 3 2 1 20 19 FCT157T S 1 16 VCC I0a I0a 2 15 S I1a 3 14 E I0d NC Ya 4 FCT157T 13 I1d VCC I0b 5 12 E I1b 6 11 Yd I0c Yb 7 10 I1c GND 8 9 Yc Yc Yd I 0d Yb Yd NC I 1d Ya I 0c 14 1516 17 18 Logic Symbol E I0a I1a S I0b I1b I0c I1c I0d I1d FCT157T Ya Yb Yc Yd FCT157T–1 Copyright © 2000, Texas Instruments Incorporated CY54/74FCT157T Maximum Ratings[2,3] Pin Description Name Description S Common Select Input E Enable Inputs (Active LOW) I0 Data Inputs from Source 0 I1 Data Inputs from Source 1 Y Non-Inverted Output (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 .................................................. −65°C to +135°C Supply Voltage to Ground Potential..................−0.5V to +7.0V DC Input Voltage .................................................−0.5V to +7.0V DC Output Voltage ..............................................−0.5V to +7.0V Function Table[1] DC Output Current (Maximum Sink Current/Pin) ...... 120 mA Outputs Power Dissipation .......................................................... 0.5W S Inputs I0 I1 Y H X X X L Static Discharge Voltage............................................>2001V (per MIL-STD-883, Method 3015) L H X L L Operating Range L H X H H L L L X L Range L L H X H Commercial Military[4] E Ambient Temperature VCC All −40°C to +85°C 5V ± 5% All −55°C to +125°C 5V ± 10% Range Electrical Characteristics Over the Operating Range Parameter VOH VOL Description Output HIGH Voltage Output LOW Voltage Test Conditions Min. Typ.[5] Max. Unit VCC=Min., IOH=−32 mA Com’l 2.0 V VCC=Min., IOH=−15 mA Com’l 2.4 3.3 V VCC=Min., IOH=−12 mA Mil 2.4 3.3 V VCC=Min., IOL=64 mA Com’l 0.3 0.55 V VCC=Min., IOL=32 mA Mil 0.3 0.55 V VIH Input HIGH Voltage 2.0 V VIL Input LOW Voltage VH Hysteresis[6] All inputs 0.2 VIK Input Clamp Diode Voltage VCC=Min., IIN=−18 mA −0.7 II Input HIGH Current IIH 0.8 V V −1.2 V VCC=Max., VIN=VCC 5 µA Input HIGH Current VCC=Max., VIN=2.7V ±1 µA IIL Input LOW Current VCC=Max., VIN=0.5V ±1 µA IOZH Off State HIGH-Level Output Current VCC = Max., VOUT = 2.7V 10 µA IOZL Off State LOW-Level Output Current VCC = Max., VOUT = 0.5V −10 µA IOS Output Short Circuit Current[7] VCC=Max., VOUT=0.0V −225 mA IOFF Power-Off Disable VCC=0V, VOUT=4.5V ±1 µA −60 −120 Note: 1. H = HIGH Voltage Level. L = LOW Voltage Level. X = Don’t Care 2. Unless otherwise noted, these limits are over the operating free-air temperature range. 3. Unused inputs must always be connected to an appropriate logic voltage level, preferably either VCC or ground. 4. TA is the “instant on” case temperature. 5. Typical values are at VCC=5.0V, TA=+25˚C ambient. 6. This parameter is specified but not tested. 7. Not more than one output should be shorted at a time. Duration of short should not exceed one second. The use of high-speed test apparatus and/or sample and hold techniques are preferable in order to minimize internal chip 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 parametric tests. In any sequence of parameter tests, IOS tests should be performed last. 2 CY54/74FCT157T Capacitance[6] Parameter Description Typ.[5] Max. Unit CIN Input Capacitance 5 10 pF COUT Output Capacitance 9 12 pF Power Supply Characteristics Parameter ICC Description Quiescent Power Supply Current Test Conditions VCC=Max., VIN≤0.2V, VIN≥VCC−0.2V Typ.[5] Max. Unit 0.1 0.2 mA ∆ICC Quiescent Power Supply Current (TTL inputs HIGH) VCC=Max., VIN=3.4V, f1=0, Outputs Open 0.5 2.0 mA ICCD Dynamic Power Supply Current[9] VCC=Max., One Input Toggling, 50% Duty Cycle, Outputs Open, OE=GND, VIN≤0.2V or VIN≥VCC−0.2V 0.06 0.12 mA/MHz IC Total Power Supply Current[10] VCC=Max., 50% Duty Cycle, Outputs Open, One Input Toggling at f1=10 MHz, OE=GND, VIN≤0.2V or VIN≥VCC−0.2V 0.7 1.4 mA VCC=Max., 50% Duty Cycle, Outputs Open, One Input Toggling at f1=10 MHz, OE=GND, VIN=3.4V or VIN=GND 1.0 2.4 mA VCC=Max., 50% Duty Cycle, Outputs Open, Four Bits Toggling at f1=2.5 MHz, OE=GND, VIN≤0.2V or VIN≥VCC−0.2V 0.7 1.4[11] mA VCC=Max., 50% Duty Cycle, Outputs Open, Four Bits Toggling at f1=2.5 MHz, OE=GND, VIN=3.4V or VIN=GND 1.7 5.4[11] mA [8] Notes: 8. Per TTL driven input (VIN=3.4V); all other inputs at VCC or GND. 9. This parameter is not directly testable, but is derived for use in Total Power Supply calculations. = IQUIESCENT + IINPUTS + IDYNAMIC 10. IC IC = ICC+∆ICCDHNT+ICCD(f0/2 + f1N1) ICC = Quiescent Current with CMOS input levels ∆ICC = Power Supply Current for a TTL HIGH input (VIN=3.4V) = Duty Cycle for TTL inputs HIGH DH = Number of TTL inputs at DH NT ICCD = Dynamic Current caused by an input transition pair (HLH or LHL) = Clock frequency for registered devices, otherwise zero f0 = Input signal frequency f1 = Number of inputs changing at f1 N1 All currents are in milliamps and all frequencies are in megahertz. 11. Values for these conditions are examples of the ICC formula. These limits are specified but not tested. 3 CY54/74FCT157T Switching Characteristics Over the Operating Range FCT157T FCT157AT Commercial Parameter Description Military FCT157CT Commercial Commercial Min.[12] Max. Min.[12] Max. Min.[12] Max. Min.[12] Max. Unit Fig. No.[13} tPLH tPHL Propagation Delay I to Y 1.5 6.0 1.5 5.8 1.5 5.0 1.5 4.3 ns 1, 3 tPLH tPHL Propagation Delay E to Y 1.5 10.5 1.5 7.4 1.5 6.0 1.5 4.8 ns 1, 5 tPLH tPHL Propagation Delay S to Y 1.5 10.5 1.5 8.1 1.5 7.0 1.5 5.2 ns 1, 3 Ordering Information Speed (ns) 4.3 5.0 5.8 Ordering Code Package Name Package Type CY74FCT157CTQCT Q1 16-Lead (150-Mil) QSOP CY74FCT157CTSOC/SOCT S1 16-Lead (300-Mil) Molded SOIC CY74FCT157ATQCT Q1 16-Lead (150-Mil) QSOP CY74FCT157ATSOC/SOCT S1 16-Lead (300-Mil) Molded SOIC CY54FCT157ATLMB L61 20-Pin Square Leadless Chip Carrier Note: 12. Minimum limits are specified but not tested on Propagation Delays. 13. See “Parameter Measurement Information” in the General Information Section Document #: 38−00288-C Package Diagrams 20-Pin Square Leadless Chip Carrier L61 MIL−STD−1835 C−2A 4 Operating Range Commercial Commercial Military CY54/74FCT157T Package Diagrams (continued) 16-Lead Quarter Size Outline Q1 16-Lead Molded SOIC S1 5 IMPORTANT NOTICE Texas Instruments and its subsidiaries (TI) reserve the right to make changes to their products or to discontinue any product or service without notice, and advise customers to obtain the latest version of relevant information to verify, before placing orders, that information being relied on is current and complete. All products are sold subject to the terms and conditions of sale supplied at the time of order acknowledgement, including those pertaining to warranty, patent infringement, and limitation of liability. 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