BiCMOS Interface Logic, 9-Bit Transparent Latches, Three-State Ci

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BiCMOS Interface Logic, 9-Bit Transparent Latches, Three-State Ci

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CD74FCT843A, CD74FCT844A
BiCMOS Interface Logic, 9-Bit Transparent Latches, Three-State
Circuit Design Speed Bipolar FASTTM/AS/S 48mA Output Sink Current Output Voltage Swing Limited 3.7V Controlled Output Edge Rates Input/Output Isolation BiCMOS Technology with Quiescent Power
January 1997
Features
ENDE IGNS ology Techn
Buffered Inputs Typical Propagation Delay: 6.8ns 25oC, 50pF (FCT843A) CD74FCT843A Noninverting CD74FCT844A Inverting Latchup Resistant BiCMOS Process
Ordering Information
PART NUMBER CD74FCT844AEN CD74FCT843AM TEMP. RANGE (oC) PACKAGE PDIP SOIC PKG. E24.3 M24.3
NOTE: When ordering suffix package, entire part number. suffix obtain variant tape reel.
Pinouts
CD74FCT843A (SOIC) VIEW CD74FCT844A (PDIP) VIEW
CAUTION: These devices sensitive electrostatic discharge. Users should follow proper Handling Procedures. FASTis trademark Fairchild Semiconductor. Copyright Harris Corporation 1997
File Number
2396.2
CD74FCT843A, CD74FCT844A Functional Diagram
843A 844A
TRUTH TABLE (Note INPUTS NOTE: HIGH Voltage Level Voltage Level Immaterial Change High Impedance 843A 844A OUTPUTS FUNCTION High Latched (High Transparent Transparent Latched Preset Clear Preset Latched (High Latched (High
CD74FCT843A, CD74FCT844A Logic Symbol
CD74FCT843A
CD74FCT844A
CD74FCT843A, CD74FCT844A
Absolute Maximum Ratings
Supply Voltage (VCC) -0.5V Diode Current, (For -0.5V) -20mA Output Diode Current, (for -0.5V) -50mA Output Sink Current Output Pin, 70mA Output Source Current Output Pin, -30mA Current (ICC) 237mA Ground Current (IGND). 453mA
Thermal Information
Thermal Resistance (Typical, Note (oC/W) PDIP Package SOIC Package Maximum Junction Temperature 150oC Maximum Storage Temperature Range .-65oC 150oC Maximum Lead Temperature (Soldering 10s) 300oC (SOIC-Lead Tips Only)
Operating Conditions
Operating Temperature Range, .0oC 70oC Supply Voltage Range, .4.75V 5.25V Input Voltage, Output Voltage, Input Rise Fall Slew Rate, dt/dv. 10ns/V
CAUTION: Stresses above those listed "Absolute Maximum Ratings" cause permanent damage device. This stress only rating operation device these other conditions above those indicated operational sections this specification implied.
NOTE: measured with component mounted evaluation board free air.
Electrical Specifications Commercial Temperature Range 70oC, 5.25V, 4.75V
AMBIENT TEMPERATURE (TA) TEST CONDITIONS PARAMETER High Level Input Voltage Level Input Voltage High Level Output Voltage Level Output Voltage High Level Input Current Level Input Current Three-State Leakage Current SYMBOL IOZH IOZL Input Clamp Voltage Short Circuit Output Current (Note Quiescent Supply Current, Additional Quiescent Supply Current Input Inputs High, Unit Load NOTES: more than output should shorted time. Test duration should exceed 100ms. Inputs that measured GND. Input Loading: inputs unit load. Unit load limit specified Static Characteristics Chart, e.g., 1.6mA Max. 70oC. 3.4V (Note (mA) 4.75 5.25 4.75 5.25 25oC 0.55 -0.1 -0.5 -1.2 70oC 0.55 -1.2 UNITS
CD74FCT843A, CD74FCT844A
Switching Specifications Over Operating Range Series 2.5ns, 50pF, (Figure
25oC PARAMETER Propagation Delays Data Outputs CD74FCT843A CD74FCT844A Outputs Outputs Outputs Output Enable Times Output Disable Times Power Dissipation Capacitance Minimum (Valley) VOHV During Switching Other Outputs (Output Under Test Switching) Maximum (Peak) VOLP During Switching Other Outputs (Output Under Test Switching) Input Capacitance Three-State Output Capacitance NOTES: Minimum 5.25V 70oC, Maximum 4.75V 70oC, Typical CPD, measured flip-flop, used determine dynamic power consumption. (per package) (VCC2 fOCL where: supply voltage flow through current unit load output load capacitance duty cycle input high output frequency input frequency tPLH, tPHL tPLH, tPHL tPLH, tPHL tPLH tPHL tPZL, tPZH tPLZ, tPHZ (Note VOHV VOLP (Note 10.5 SYMBOL 70oC UNITS
Prerequisite Switching
25oC PARAMETER Setup Time, Data Hold Time, Data Pulse Width PRE, Pulse Width PRE, Recovery Time NOTE: Minimum 4.75V 70oC, Typical SYMBOL tREC (Note 70oC UNITS
Test Circuits Waveforms
2.5ns (NOTE PULSE 50pF
SWITCH POSITION TEST tPLZ, tPZL, Open Drain tPHZ, tPZH, tPLH, tPHL SWITCH Closed Open
NOTE: Pulse Generator Pulses: Rate 1.0MHz;
DEFINITIONS: Load capacitance, includes probe capacitance. Termination resistance, should equal ZOUT Pulse Generator.
IMPORTANT NOTICE Texas Instruments subsidiaries (TI) reserve right make changes their products discontinue product service without notice, advise customers obtain latest version relevant information verify, before placing orders, that information being relied current complete. products sold subject terms conditions sale supplied time order acknowledgement, including those pertaining warranty, patent infringement, limitation liability. warrants performance semiconductor products specifications applicable time sale accordance with TI's standard warranty. Testing other quality control techniques utilized extent deems necessary support this warranty. Specific testing parameters each device necessarily performed, except those mandated government requirements. CERTAIN APPLICATIONS USING SEMICONDUCTOR PRODUCTS INVOLVE POTENTIAL RISKS DEATH, PERSONAL INJURY, SEVERE PROPERTY ENVIRONMENTAL DAMAGE ("CRITICAL APPLICATIONS"). SEMICONDUCTOR PRODUCTS DESIGNED, AUTHORIZED, WARRANTED SUITABLE LIFE-SUPPORT DEVICES SYSTEMS OTHER CRITICAL APPLICATIONS. INCLUSION PRODUCTS SUCH APPLICATIONS UNDERSTOOD FULLY CUSTOMER'S RISK. order minimize risks associated with customer's applications, adequate design operating safeguards must provided customer minimize inherent procedural hazards. assumes liability applications assistance customer product design. does warrant represent that license, either express implied, granted under patent right, copyright, mask work right, other intellectual property right covering relating combination, machine, process which such semiconductor products services might used. TI's publication information regarding third party's products services does constitute TI's approval, warranty endorsement thereof.
Copyright 1999, Texas Instruments Incorporated

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