Data sheet acquired from Cypress Semiconductor Corporation. Data sheet modified to remove devices not offered. CY74FCT16841T CY74FCT162841T 20-Bit Latches SCCS067A - July 1994 - Revised October 2001 Features • • • • • • • • Functional Description FCT-C speed at 5.5 ns (FCT16841T Com’l) 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% The CY74FCT16841T and CY74FCT162841T are 20-bit D-type latches designed for use in bus applications requiring high speed and low power. These devices can be used as two independent 10-bit latches, or as a single 10-bit latch, or as a single 20-bit latch by connecting the Output Enable (OE) and Latch (LE) inputs. Flow-through pinout and small shrink packaging aid in simplifying board layout. 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 CY74FCT16841T is ideally suited for driving high-capacitance loads and low-impedance backplanes. CY74FCT16841T Features: • 64 mA sink current, 32 mA source current • Typical VOLP (ground bounce) <1.0V at VCC = 5V, TA = 25˚C The CY74FCT162841T 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 CY74FCT162841T is ideal for driving transmission lines. CY74FCT162841T Features: • Balanced 24 mA output drivers • Reduced system switching noise • Typical VOLP (ground bounce) <0.6V at VCC = 5V, TA= 25˚C Pin Configuration Logic Block Diagrams SSOP/TSSOP Top View 1OE 1LE 1D1 D 1Q1 C TO 9 OTHER CHANNELS FCT16841-1 2OE 2LE 2D1 D 2Q1 C TO 9 OTHER CHANNELS FCT16841-2 1OE 1 56 1LE 1Q1 2 55 1 D1 1Q2 GND 3 4 54 53 1Q3 5 52 1Q4 6 51 1 D4 VCC 7 50 VCC 1 D5 1 D2 GND 1 D3 1Q5 8 49 1Q6 9 48 1 D6 1Q7 10 47 1 D7 GND 11 46 GND 1Q8 12 45 1 D8 1Q9 13 44 1 D9 1Q10 14 43 1D10 2Q1 15 42 2 D1 2Q2 16 41 2 D2 2Q3 17 40 2 D3 GND 18 39 GND 2Q4 19 38 2 D4 2Q5 20 37 2 D5 2Q6 21 36 2 D6 VCC 2Q7 22 35 VCC 23 34 2 D7 2Q8 24 33 2 D8 GND 2Q9 25 32 GND 26 31 2 D9 2Q10 27 30 2D10 2OE 28 29 2LE FCT16841-3 Copyright © 2001, Texas Instruments Incorporated CY74FCT16841T CY74FCT162841T Function Table[1] Pin Description Name Description Inputs Outputs D Data Inputs D LE OE Q LE Latch Enable Input (Active HIGH) H H L H OE Output Enable Input (Active LOW) L H L L O Three-State Outputs X L L Q[2] X X H Z Maximum Ratings[3, 4] (Above which the useful life may be impaired. For user guidelines, not tested.) Power Dissipation .......................................................... 1.0W Storage Temperature ...................................... −55°C to +125°C Static Discharge Voltage............................................>2001V (per MIL-STD-883, Method 3015) Ambient Temperature with Power Applied .................................................. −55°C to +125°C Operating Range DC Input Voltage .................................................−0.5V to +7.0V Range DC Output Voltage ..............................................−0.5V to +7.0V Industrial DC Output Current (Maximum Sink Current/Pin) ...........................−60 to +120 mA Ambient Temperature VCC −40°C to +85°C 5V ± 10% Electrical Characteristics Over the Operating Range Parameter Description Test Conditions VIH Input HIGH Voltage Logic HIGH Level VIL Input LOW Voltage Logic LOW Level VH Input Hysteresis[6] VIK Input Clamp Diode Voltage VCC=Min., IIN=−18 mA IIH Input HIGH Current IIL Input LOW Current IOZH Min. Typ.[5] Max. 2.0 Unit V 0.8 100 mV −1.2 V VCC=Max., VI=VCC ±1 µA VCC=Max., VI=GND ±1 µA 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[7] VCC=Max., VOUT=GND −80 −200 mA IO Output Drive Current[7] VCC=Max., VOUT=2.5V −50 −180 mA ±1 µA IOFF Power-Off Disable VCC=0V, VOUT ≤4.5V[8] −0.7 V −140 Notes: 1. H = HIGH Voltage Level. L = LOW Voltage Level. X = Don’t Care. Z = HIGH Impedance. 2. Output level before LE HIGH-to-LOW Transition. 3. Operation beyond the limits set forth may impair the useful life of the device. Unless otherwise noted, these limits are over the operating free-air temperature range. 4. Unused inputs must always be connected to an appropriate logic voltage level, preferably either VCC or ground. 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. 8. Tested at +25˚C. 2 CY74FCT16841T CY74FCT162841T Output Drive Characteristics for CY74FCT16841T Parameter VOH VOL Min. Typ.[5] VCC=Min., IOH=−3 mA 2.5 3.5 VCC=Min., IOH=−15 mA 2.4 3.5 VCC=Min., IOH=−32 mA 2.0 3.0 Description Output HIGH Voltage Output LOW Voltage Test Conditions VCC=Min., IOL=64 mA Max. Unit V 0.2 0.55 V Min. Typ.[5] Max. Unit Output Drive Characteristics for CY74FCT162841T Parameter Description Test Conditions Output LOW Current[7] VCC=5V, VIN=VIH or VIL, VOUT=1.5V 60 115 150 mA IODH Output HIGH Current[7] 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 IODL V 0.3 0.55 V Typ.[5] Max. Unit Capacitance[6] (TA =+25˚C, f = 1.0 MHz) Symbol Description Conditions CIN Input Capacitance VIN = 0V 4.5 6.0 pF COUT Output Capacitance VOUT = 0V 5.5 8.0 pF Min. Typ.[5] Power Supply Characteristics Parameter Description Test Conditions Max. Unit ICC Quiescent Power Supply Current VCC=Max. VIN<0.2V VIN>VCC-0.2V — 5 500 µA ∆ICC Quiescent Power Supply Current (TTL inputs HIGH) VCC=Max., VIN=3.4V[9] — 0.5 1.5 mA ICCD Dynamic Power Supply Current[10] 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[11] VCC=Max., f1=10 MHz, 50% Duty Cycle, Outputs Open, One Bit Toggling, OE=GND LE = VCC VIN=VCC or VIN=GND — 0.6 1.5 mA VIN=3.4V or VIN=GND — 0.9 2.3 VIN=VCC or VIN=GND — 3.0 5.5[12] VIN=3.4V or VIN=GND — 8.0 20.5[12] VCC=Max., f1=2.5 MHz, 50% Duty Cycle, Outputs Open, Twenty Bits Toggling, OE=GND LE = VCC Notes: 9. Per TTL driven input (VIN=3.4V); all other inputs at VCC or GND. 10. This parameter is not directly testable, but is derived for use in Total Power Supply calculations. = IQUIESCENT + IINPUTS + IDYNAMIC 11. 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. 12. Values for these conditions are examples of the ICC formula. These limits are specified but not tested. 3 CY74FCT16841T CY74FCT162841T Switching Characteristics Over the Operating Range[13] 74FCT16841AT Parameter tPLH tPHL tPLH tPHL tPHZ tPZL tPHZ tPLZ Description Propagation Delay D to Q (LE=HIGH) Propagation Delay LE to Q Output Enable Time OE to Q Output Disable Time OE to Q 74FCT16841CT 74FCT162841CT Condition[14] Min. Max. Min. Max. Unit Fig. No.[15] CL=50 pF RL=500Ω 1.5 9.0 1.5 5.5 ns 1, 5 CL=300 pF[16] RL=500Ω 1.5 13.0 1.5 13.0 CL=50 pF RL=500Ω 1.5 12.0 1.5 6.4 ns 1, 5 CL=300 pF[16] RL=500Ω 1.5 16.0 1.5 15.0 CL=50 pF RL=500Ω 1.5 11.5 1.5 6.5 ns 1, 7, 8 CL=300 pF[16] RL=500Ω 1.5 23.0 1.5 12.0 CL=5 pF[16] RL=500Ω 1.5 7.0 1.5 5.7 ns 1, 7, 8 CL=50 pF RL=500Ω 1.5 8.0 1.5 6.0 CL=50 pF RL=500Ω 2.5 — 2.0 — ns 9 tSU Set-Up Time HIGH or LOW, D to LE tH Hold Time HIGH or LOW, D to LE 2.5 — 1.5 — ns 9 tW LE Pulse Width HIGH 4.0[17] — 4.0[17] — ns 5 — 0.5 — 0.5 ns — tSK(O) Output Skew[18] Notes: 13. Minimum limits are specified but not tested on Propagation Delays. 14. See test circuit and waveform. 15. See “Parameter Measurement Information” in the General Information section. 16. These conditions are specified but not tested. 17. These limits are specified but not tested. 18. Skew between any two outputs of the same package switching in the same direction. This parameter is ensured by design. Ordering Information for CY74FCT16841T Speed (ns) Ordering Code Package Name Package Type Operating Range 5.5 CY74FCT16841CTPVC/PVCT O56 56-Lead (300-Mil) SSOP Industrial 6.5 CY74FCT16841ATPVC/PVCT O56 56-Lead (300-Mil) SSOP Industrial Ordering Information CY74FCT162841T Speed (ns) 5.5 Ordering Code Package Name Package Type 74FCT162841CTPACT Z56 56-Lead (240-Mil) TSSOP CY74FCT162841CTPVC O56 56-Lead (300-Mil) SSOP 74FCT162841CTPVCT O56 56-Lead (300-Mil) SSOP 4 Operating Range Industrial CY74FCT16841T CY74FCT162841T Package Diagrams 56-Lead Shrunk Small Outline PackageO56 56-Lead Thin Shrunk Small Outline Package Z56 5 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. Customers should obtain the latest relevant information before placing orders and should verify that such information is current and complete. All products are sold subject to TI’s terms and conditions of sale supplied at the time of order acknowledgment. TI warrants performance of its hardware products to the specifications applicable at the time of sale in accordance with TI’s standard warranty. Testing and other quality control techniques are used to the extent TI deems necessary to support this warranty. Except where mandated by government requirements, testing of all parameters of each product is not necessarily performed. TI assumes no liability for applications assistance or customer product design. Customers are responsible for their products and applications using TI components. To minimize the risks associated with customer products and applications, customers should provide adequate design and operating safeguards. TI does not warrant or represent that any license, either express or implied, is granted under any TI patent right, copyright, mask work right, or other TI intellectual property right relating to any combination, machine, or process in which TI products or services are used. Information published by TI regarding third–party products or services does not constitute a license from TI to use such products or services or a warranty or endorsement thereof. Use of such information may require a license from a third party under the patents or other intellectual property of the third party, or a license from TI under the patents or other intellectual property of TI. Reproduction of information in TI data books or data sheets is permissible only if reproduction is without alteration and is accompanied by all associated warranties, conditions, limitations, and notices. Reproduction of this information with alteration is an unfair and deceptive business practice. TI is not responsible or liable for such altered documentation. Resale of TI products or services with statements different from or beyond the parameters stated by TI for that product or service voids all express and any implied warranties for the associated TI product or service and is an unfair and deceptive business practice. TI is not responsible or liable for any such statements. Mailing Address: Texas Instruments Post Office Box 655303 Dallas, Texas 75265 Copyright 2001, Texas Instruments Incorporated