1CY74FCT162240T Data sheet acquired from Cypress Semiconductor Corporation. Data sheet modified to remove devices not offered. CY74FCT16240T CY74FCT162240T 16-Bit Buffers/Line Drivers SCCS027B - August 1994 - Revised September 2001 Features Functional Description • Ioff supports partial-power-down mode operation • Edge-rate control circuitry for significantly improved noise characteristics • Typical output skew < 250 ps • ESD > 2000V • TSSOP (19.6-mil pitch) and SSOP (25-mil pitch) packages • Industrial temperature range of –40˚C to +85˚C • VCC = 5V ± 10% CY74FCT16240T Features: • 64 mA sink current, 32 mA source current • Typical VOLP (ground bounce) <1.0V at VCC = 5V, TA = 25˚C These 16-bit buffer/line drivers are used in memory driver, clock driver, or other bus interface applications, where high speed and low power are required. With flow-through pinout and small shrink packaging, board layout is simplified. The three-state controls are designed to allow 4-, 8-, or 16-bit operation. This device is fully specified for partial-power-down applications using Ioff. The Ioff circuitry disables the outputs, preventing damaging current backflow through the device when it is powered down. The CY74FCT16240T is ideally suited for driving high-capacitance loads and low-impedance backplanes. The CY74FCT162240T has 24-mA balanced output drivers with current limiting resistors in the outputs. This reduces the need for external terminating resistors and provides for minimal undershoot and reduced ground bounce. The CY74FCT162240T is ideal for driving transmission lines. CY74FCT162240T Features: • Balanced output drivers: 24 mA • Reduced system switching noise • Typical VOLP (ground bounce) <0.6V at VCC = 5V, TA= 25˚C Logic Block Diagrams Pin Configuration 1OE 3OE 1A1 3A1 1A2 1A3 1A4 1Y1 1Y2 1Y3 1Y4 3A2 3A3 3A4 2OE 4OE 2A1 4A1 2A2 2A3 2A4 2Y2 2Y3 2Y4 FCT16240–2 3Y1 3Y2 3Y3 3Y4 FCT16240–3 FCT16240–1 2Y1 SSOP/TSSOP Top View 4A2 4A3 4A4 4Y1 4Y2 4Y3 4Y4 FCT16240–4 1OE 1 48 1Y1 2 47 1A1 1Y2 3 46 1A2 GND 4 45 GND 1Y3 5 44 1A3 1Y4 6 43 1A4 VCC 7 42 VCC 2Y1 8 41 2A1 2Y2 9 40 2A2 GND 10 39 GND 2Y3 11 38 2A3 2Y4 37 2A4 3Y1 12 13 36 3A1 3Y2 14 35 3A2 GND 15 34 GND 3Y3 16 33 3A3 3Y4 17 32 3A4 VCC 18 31 VCC 4Y1 19 30 4A1 4Y2 20 29 4A2 GND 21 28 GND 4Y3 22 27 4A3 4Y4 23 26 4A4 4OE 24 25 3OE 2OE FCT16240–5 Copyright © 2001, Texas Instruments Incorporated CY74FCT16240T CY74FCT162240T Maximum Ratings[2, 3] Pin Summary Name (Above which the useful life may be impaired. For user guidelines, not tested.) Description OE Three-State Output Enable Inputs (Active LOW) A Data Inputs Y Three-State Outputs Storage Temperature ......................Com’l . –55°C to +125°C Ambient Temperature with Power Applied..................................Com’l . –55°C to +125°C DC Input Voltage ........................................... –0.5V to +7.0V Function Table[1] DC Output Voltage......................................... –0.5V to +7.0V Inputs Outputs OE A Y DC Output Current (Maximum Sink Current/Pin) ........................–60 to +120 mA L L H Power Dissipation .......................................................... 1.0W L H L H X Z Static Discharge Voltage (per MIL-STD-883, Method 3015) .............................>2001V Operating Range Range Industrial Ambient Temperature VCC –40°C to +85°C 5V ± 10% Electrical Characteristics Over the Operating Range Parameter Description Test Conditions Min. Typ.[4] Max. VIH Input HIGH Voltage VIL Input LOW Voltage VH Input Hysteresis[5] VIK Input Clamp Diode Voltage VCC = Min., IIN= –18 mA –1.2 V IIH Input HIGH Current VCC = Max., VI = VCC ±1 µA IIH Input HIGH Current VCC = Max., VI = VCC ±1 µA IIL Input LOW Current VCC = Max., VI = GND ±1 µA IIL Input LOW Current VCC = Max., VI = GND ±1 µA IOZH High Impedance Output Current (Three-State Output pins) VCC = Max., VOUT = 2.7V ±1 µA IOZL High Impedance Output Current (Three-State Output pins) VCC = Max., VOUT = 0.5V ±1 µA IOS Short Circuit Current[6] VCC = Max., VOUT = GND –80 –200 mA IO Output Drive Current[6] VCC = Max., VOUT = 2.5V –50 –180 mA Power-Off Disable VCC = 0V, VOUT ≤ ±1 µA Max. Unit IOFF 2.0 Unit V 0.8 100 –0.7 –140 4.5V[7] V mV Output Drive Characteristics for CY74FCT16240T Parameter VOH VOL Description Output HIGH Voltage Output LOW Voltage Min. Typ.[4] VCC = Min., IOH= –3 mA 2.5 3.5 V VCC = Min., IOH= –15 mA 2.4 3.5 V VCC = Min., IOH= –32 mA 2.0 3.0 V Test Conditions VCC = Min., IOL= 64 mA 0.2 0.55 V Notes: 1. H = HIGH Voltage Level. L = LOW Voltage Level. X = Don’t Care. Z = High Impedance. 2. Operation beyond the limits set forth may impair the useful life of the device. Unless 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. Typical values are at VCC=5.0V, TA= +25˚C ambient. 5. This parameter is specified but not tested. 6. 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. 7. Tested at +25˚C. 2 CY74FCT16240T CY74FCT162240T Output Drive Characteristics for CY74FCT162240T Parameter Description [6] Test Conditions Min. Typ.[4] Max. Unit IODL Output LOW Current VCC = 5V, VIN = VIH or VIL,VOUT = 1.5V 60 115 150 mA IODH Output HIGH Current[6] VCC = 5V, VIN = VIH or VIL, VOUT = 1.5V –60 –115 –150 mA VOH Output HIGH Voltage VCC = Min., IOH = –24 mA 2.4 3.3 VOL Output LOW Voltage VCC = Min., IOL = 24 mA V 0.3 0.55 V Typ.[4] Capacitance[5] (TA = +25˚C, f = 1.0 MHz) Parameter Description Test Conditions Max. Unit CIN Input Capacitance VIN = 0V 4.5 6.0 pF COUT Output Capacitance VOUT = 0V 5.5 8.0 pF Power Supply Characteristics Parameter Description Test Conditions Typ.[4] Max. Unit 5 500 µA ICC Quiescent Power Supply Current VCC=Max. VIN≤0.2V, VIN≥VCC–0.2V ∆ICC Quiescent Power Supply Current (TTL inputs HIGH) VCC=Max. VIN=3.4V[8] 0.5 1.5 mA ICCD Dynamic Power Supply Current[9] VCC=Max., One Input Toggling, 50% Duty Cycle, Outputs Open, OE=GND VIN=VCC or VIN=GND 60 100 µA/MHz IC Total Power Supply Current[10] VCC=Max., f1=10 MHz, 50% Duty Cycle, Outputs Open, One Bit Toggling, OE=GND VIN=VCC or VIN=GND 0.6 1.5 mA VIN=3.4V or VIN=GND 0.9 2.3 mA VIN=VCC or VIN=GND 2.4 4.5[11] mA VIN=3.4V or VIN=GND 6.4 16.5[11] mA VCC=Max., f1=2.5 MHz, 50% Duty Cycle, Outputs Open, Sixteen Bits Toggling, OE=GND 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. 10. IC = IQUIESCENT + IINPUTS + IDYNAMIC 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) 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) f0 = Clock frequency for registered devices, otherwise zero f1 = Input signal frequency N1 = Number of inputs changing at f1 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 CY74FCT16240T CY74FCT162240T Switching Characteristics Over the Operating Range[12] CY74FCT16240AT Parameter Description CY74FCT162240CT Min. Max. Min. Max. Unit Fig. No.[13] tPLH tPHL Propagation Delay Data to Output 1.5 4.8 1.5 4.3 ns 1, 2 tPZH tPZL Output Enable Time 1.5 6.2 1.5 5.8 ns 1, 7, 8 tPHZ tPLZ Output Disable Time 1.5 5.6 1.5 5.2 ns 1, 7, 8 tSK(O) Output Skew[14] 0.5 ns — 0.5 Note: 12. Minimum limits are specified but not tested on Propagation Delays. 13. See “Parameter Measurement Information” in the General Information section. 14. Skew between any two outputs of the same package switching in the same direction. This parameter is ensured by design. Ordering Information CY74FCT16240 Speed (ns) 4.8 Ordering Code CY74FCT16240ATPVC/PVCT Package Name O48 Package Type 48-Lead (300-Mil) SSOP Operating Range Industrial Ordering Information CY74FCT162240 Speed (ns) 4.3 Ordering Code Package Name Package Type 74FCT162240CTPACT Z48 48-Lead (240-Mil) TSSOP CY74FCT162240CTPVC O48 48-Lead (300-Mil) SSOP 74FCT162240CTPVCT O48 48-Lead (300-Mil) SSOP Document #: 38-00395-C 4 Operating Range Industrial CY74FCT16240T CY74FCT162240T Package Diagrams 48-Lead Shrunk Small Outline Package O48 5 CY74FCT16240T CY74FCT162240T Package Diagrams 48-Lead Thin Shrunk Small Outline Package 6 IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications, enhancements, improvements, and other changes to its products and services at any time and to discontinue any product or service without notice. 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