Data sheet acquired from Cypress Semiconductor Corporation. Data sheet modified to remove devices not offered. CY74FCT191T 4-Bit Up/Down Binary Counter SCCS016 - May 1994 - Revised February 2000 Features Functional Description • Function, pinout, and drive compatible with FCT and F logic • FCT-C speed at 6.2 ns max, FCT-A speed at 7.8 ns max. • Reduced VOH (typically = 3.3V) versions of equivalent FCT functions • Edge-rate control circuitry for significantly improved noise characteristics • Power-off disable permits live insertion • ESD > 2000V • Matched rise and fall times • Sink current 64 mA Source current 32 mA The FCT191T is a reversible modulo-16 binary counter, featuring synchronous counting and asynchronous presetting. The preset allows the FCT191T to be used in programmable dividers. The count enable input, terminal count output, and ripple clock output make possible a variety of methods of implementing multiusage counters. In the counting modes, state changes are initiated by the rising edge of the clock. The outputs are designed with a power-off disable feature to allow for live insertion of boards. Logic Block Diagram CP U/D P0 CE Pin Configurations P1 P2 P3 PL SOIC/QSOP Top View J CLOCK K PRESET CLEAR Q Q RC TC J CLOCK K PRESET CLEAR Q Q Q1 Q0 Pin Description Name J CLOCK K PRESET CLEAR Q Q P1 1 16 VCC Q1 2 15 P0 Q0 3 14 CP CE 4 13 RC U/D 5 12 TC Q2 6 11 PL Q3 7 10 P2 GND 8 9 P3 J CLOCK K PRESET CLEAR Q Q Q2 Q3 RC Function Table[1] Description CE Count Enable Input (Active LOW) CP Clock Pulse Input (Active Rising Edge) P Parallel Data Inputs PL Asynchronous Parallel Load Input (Active LOW) U/D Up/Down Count Control Input Q Flip-Flop Outputs RC Ripple Clock Output (Active LOW) TC Terminal Count Output Inputs CE L H X Outputs CP T[2] RC X X H X L H H Copyright © 2000, Texas Instruments Incorporated CY74FCT191T RC Function Table[1] Ambient Temperature with Power Applied............................................. –65°C to +135°C Inputs Outputs CE CP T [2] Supply Voltage to Ground Potential ............... –0.5V to +7.0V RC DC Input Voltage ........................................... –0.5V to +7.0V Notes: 1. H = HIGH Voltage Level, L = LOW Voltage Level, X = Don‘t Care, = LOW-to-HIGH clock transition. =Low Pulse. 2. TC is generated internally. DC Output Voltage......................................... –0.5V to +7.0V DC Output Current (Maximum Sink Current/Pin) ...... 120 mA Power Dissipation .......................................................... 0.5W Mode Select[1] Static Discharge Voltage............................................>2001V (per MIL-STD-883, Method 3015) Inputs PL CE U/D H H L H L L X H L H X X CP X X Mode Operating Range Count Up Count Down Preset (Asynchronous) No Change (Hold) Ambient Temperature VCC –40°C to +85°C 5V ± 5% Range Commercial Maximum Ratings[3, 4] (Above which the useful life may be impaired. For user guidelines, not tested.) Storage Temperature .................................–65°C to +150°C Electrical Characteristics Over the Operating Range Parameter VOH Description Output HIGH Voltage Test Conditions Min. VCC=Min., IOH=–32 mA 2.0 VCC=Min., IOH=–15 mA 2.4 Max. Unit V 3.3 Output LOW Voltage VIH Input HIGH Voltage VIL Input LOW Voltage VH Hysteresis[6] All inputs 0.2 VIK Input Clamp Diode Voltage VCC=Min., IIN=–18 mA –0.7 –1.2 V II Input HIGH Current VCC=Max., VIN=VCC 5 µA IIH Input HIGH Current VCC=Max., VIN=2.7V ±1 µA IIL Input LOW Current VCC=Max., VIN=0.5V ±1 µA –225 mA ±1 µA Output Short Circuit IOFF Power-Off Disable 0.3 V VOL IOS VCC=Min., IOL=64 mA Typ.[5] 0.55 V 2.0 V 0.8 Current[7] VCC=Max., VOUT=0.0V –60 –120 VCC=0V, VOUT=4.5V V V Capacitance[6] Parameter Description Typ.[5] Max. Unit CIN Input Capacitance 5 10 pF COUT Output Capacitance 9 12 pF Notes: 3. 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. 2 CY74FCT191T Power Supply Characteristics Parameter Description Test Conditions Typ.[5] Max. Unit ICC Quiescent Power Supply Current VCC=Max., VIN < 0.2V, VIN > VCC–0.2V 0.1 0.2 mA ∆ICC Quiescent Power Supply Current (TTL inputs HIGH) VCC=Max., VIN=3.4V,[8] f1=0, Outputs Open 0.5 2.0 mA ICCD Dynamic Power Supply Current[9] VCC=Max., One Bit Toggling, Preset Mode, 50% Duty Cycle, Outputs Open, MR=VCC=SR, PL=CE=U/D=CP=GND, VIN < 0.2V or VIN > VCC–0.2V 0.06 0.12 mA/MHz IC Total Power Supply Current[10] VCC=Max., Preset Mode, 50% Duty Cycle, Outputs Open, One Bit Toggling at f1=5 MHz, PL=CE=U/D=CP=GND, VIN=VCC, VIN=GND 0.4 0.8 mA VCC=Max., Preset Mode, 50% Duty Cycle, Outputs Open, One Bit Toggling at f1=5 MHz, VIN=3.4V or VIN=GND 0.7 1.8 mA VCC=Max., Preset Mode, 50% Duty Cycle, Outputs Open, Four Bits Toggling at f1=5 MHz, PL=CE=U/D=CP=GND, VIN=VCC, VIN=GND 1.3 2.6[11] mA VCC=Max., Preset Mode, 50% Duty Cycle, Outputs Open, Four Bits Toggling at f1=5 MHz, PL=CE=U/D=CP=GND, VIN=3.4V or VIN=GND 2.3 6.6[11] mA 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) 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) = Clock frequency for registered devices, otherwise zero f0 = Input signal frequency f1 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 CY74FCT191T Switching Characteristics Over the Operating Range CY74FCT191AT Parameter Description [12] Min. CY74FCT191CT Max. Min.[12] Max. Unit Fig. No.[13] tPLH tPHL Propagation Delay CP to Qn 1.5 7.8 1.5 6.2 ns 1, 5 tPLH tPHL Propagation Delay CP to TC 1.5 11.8 1.5 9.4 ns 1, 5 tPLH tPHL Propagation Delay CP to RC 1.5 8.5 1.5 6.8 ns 1, 5 tPLH tPHL Propagation Delay CE to RC 1.5 7.2 1.5 6.0 ns 1, 5 tPLH tPHL Propagation Delay U/D to RC 1.5 13.0 1.5 11.0 ns 1, 5 tPLH tPHL Propagation Delay U/D to TC 1.5 7.2 1.5 6.1 ns 1, 5 tPLH tPHL Propagation Delay Pn to Qn 1.5 9.1 1.5 7.7 ns 1, 5 tPLH tPHL Propagation Delay PL to Qn 2.0 8.5 2.0 7.2 ns 1, 5 tSU Set-Up Time HIGH or LOW Pn to PL 4.0 3.5 ns 4 tH Hold Time HIGH or LOW Pn to PL 1.5 1.0 ns 4 tSU Set-Up Time LOW CE to CP 9.0 7.2 ns 4 tH Hold Time LOW CE to CP 0 0 ns 4 tSU Set-Up Time HIGH or LOW U/D to CP 10.0 8.0 ns 4 tH Hold Time HIGH or LOW U/D to CP 0 0 ns 4 tW PL Pulse Width LOW 5.5 5.0 ns 5 Width[6] tW Clock Pulse HIGH or LOW 4.0 4.0 ns 5 tREM Recovery Time PL to CP 5.0 4.5 ns 6 Notes: 12. Minimum limits are specified but not tested on Propagation Delays. 13. See “Parameter Measurement Information” in the General Information section. Ordering Information Speed (ns) 6.2 7.8 Ordering Code Package Name Package Type CY74FCT191CTQCT Q1 16-Lead (150-Mil) QSOP CY74FCT191CTSOC/SOCT S1 16-Lead (300-Mil) Molded SOIC CY74FCT191ATSOC/SOCT S1 16-Lead (300-Mil) Molded SOIC Document #: 38-00286-B 4 Operating Range Commercial Commercial CY74FCT191T Package Diagrams 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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