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| 74F169 4-Stage Synchronous Bidirectional Counter April 1988 Revised July 1999 74F169 4-Stage Synchronous Bidirectional Counter General Description The 74F169 is a fully synchronous 4-stage up/down counter. The 74F169 is a modulo-16 binary counter. Features a preset capability for programmable operation, carry lookahead for easy cascading and a U/D input to control the direction of counting. All state changes, whether in counting or parallel loading, are initiated by the LOW-toHIGH transition of the clock. Features s Asynchronous counting and loading s Built-in lookahead carry capability s Presettable for programmable operation Ordering Code: Order Number 74F169SC 74F169SJ 74F169PC Package Number M16A M16D N16E Package Description 16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150 Narrow 16-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide 16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide Devices also available in Tape and Reel. Specify by appending the suffix letter "X" to the ordering code. Logic Symbols Connection Diagram IEEE/IEC (c) 1999 Fairchild Semiconductor Corporation DS009488 www.fairchildsemi.com 74F169 Unit Loading/Fan Out Pin Names CEP CET CP P0-P3 PE U/D Q0-Q3 TC Description Count Enable Parallel Input (Active LOW) Count Enable Trickle Input (Active LOW) Clock Pulse Input (Active Rising Edge) Parallel Data Inputs Parallel Enable Input (Active LOW) Up-Down Count Control Input Flip-Flop Outputs Terminal Count Output (Active LOW) U.L. HIGH/LOW 1.0/1.0 1.0/2.0 1.0/1.0 1.0/1.0 1.0/1.0 1.0/1.0 50/33.3 50/33.3 Input IIH/IIL Output IOH/IOL 20 A/-0.6 mA 20 A/-1.2 mA 20 A/-0.6 mA 20 A/-0.6 mA 20 A/-0.6 mA 20 A/-0.6 mA -1 mA/20 mA -1 mA/20 mA Functional Description The 74F169 uses edge-triggered J-K type flip-flops and has no constraints on changing the control or data input signals in either state of the clock. The only requirement is that the various inputs attain the desired state at least a setup time before the rising edge of the clock and remain valid for the recommended hold time thereafter. The parallel load operation takes precedence over other operations, as indicated in the Mode Select Table. When PE is LOW, the data on the P0-P3 inputs enters the flip-flops on the next rising edge of the clock. In order for counting to occur, both CEP and CET must be LOW and PE must be HIGH; the U/D input then determines the direction of counting. The Terminal Count (TC) output is normally HIGH and goes LOW, provided that CET is LOW, when a counter reaches zero in the Count Down mode or reaches 15 for the 74F169 in the Count Up mode. The TC output state is not a function of the Count Enable Parallel (CEP) input level. Since the TC signal is derived by decoding the flip-flop states, there exists the possibility of decoding spikes on TC. For this reason the use of TC as a clock signal is not recommended (see logic equations below). 1. Count Enable = CEP * CET * PE 2. Up: (74F169): TC = Q0 * Q1 * Q2 * Q3 * (Up) * CET 3. Down: TC = Q0 * Q1 * Q2 * Q3 * (Down) * CET Mode Select Table PE L H H H H CEP CET U/D X L L H X X L L X H X H L X X Action on Rising Clock Edge Load (Pn Qn) Count Up (Increment) Count Down (Decrement) No Change (Hold) No Change (Hold) H = HIGH Voltage Level L = LOW Voltage Level X = Immaterial State Diagram www.fairchildsemi.com 2 74F169 Logic Diagram Please note that these diagrams are provided only for the understanding of logic operations and should not be used to estimate propagation delays. 3 www.fairchildsemi.com 74F169 Absolute Maximum Ratings(Note 1) Storage Temperature Ambient Temperature under Bias Junction Temperature under Bias VCC Pin Potential to Ground Pin Input Voltage (Note 2) Input Current (Note 2) Voltage Applied to Output in HIGH State (with VCC = 0V) Standard Output 3-STATE Output Current Applied to Output in LOW State (Max) twice the rated IOL (mA) -0.5V to VCC -0.5V to +5.5V -65C to +150C -55C to +125C -55C to +150C -0.5V to +7.0V -0.5V to +7.0V -30 mA to +5.0 mA Recommended Operating Conditions Free Air Ambient Temperature Supply Voltage 0C to +70C +4.5V to +5.5V Note 1: Absolute maximum ratings are values beyond which the device may be damaged or have its useful life impaired. Functional operation under these conditions is not implied. Note 2: Either voltage limit or current limit is sufficient to protect inputs. DC Electrical Characteristics Symbol VIH VIL VCD VOH VOL IIH IBVI ICEX VID IOD IIL Parameter Input HIGH Voltage Input LOW Voltage Input Clamp Diode Voltage Output HIGH Voltage Output LOW Voltage Input HIGH Current Input HIGH Current Breakdown Test Output HIGH Leakage Current Input Leakage Test Output Leakage Circuit Current Input LOW Current -60 35 4.75 3.75 -0.6 -1.2 IOS ICCL Output Short-Circuit Current Power Supply Current -150 52 mA mA Max Max 10% VCC 5% VCC 10% VCC 2.5 2.7 0.5 5.0 7.0 50 Min 2.0 0.8 -1.2 Typ Max Units V V V V V A A A V A mA Min Min Min Max Max Max 0.0 0.0 Max VCC Conditions Recognized as a HIGH Signal Recognized as a LOW Signal IIN = -18 mA IOH = -1 mA IOH = -1 mA IOL = 20 mA VIN = 2.7V VIN = 7.0V VOUT = VCC IID = 1.9 A All Other Pins Grounded VIOD = 150 mV All Other Pins Grounded VIN = 0.5V (except CET) VIN = 0.5V (CET) VOUT = 0V VO = LOW www.fairchildsemi.com 4 74F169 AC Electrical Characteristics TA = +25C Symbol Parameter Min fMAX tPLH tPHL tPLH tPHL tPLH tPHL tPLH tPHL Maximum Count Frequency Propagation Delay CP to Qn (PE HIGH or LOW) Propagation Delay CP to TC Propagation Delay CET to TC Propagation Delay U/D to TC 90 3.0 4.0 5.5 4.0 2.5 2.5 3.5 4.0 6.5 9.0 12.0 8.5 4.5 8.5 8.5 8.0 8.5 11.5 15.5 12.5 6.5 11.0 11.5 12.0 VCC = +5.0V CL = 50 pF Typ Max TA = -55C to +125C VCC = +5.0V CL = 50 pF Min 60 3.0 4.0 5.5 4.0 2.5 2.5 3.5 4.0 12.0 16.0 20.0 15.0 9.0 12.0 16.0 14.0 Max TA = 0C to +70C VCC = +5.0V CL = 50 pF Min 70 3.0 4.0 5.5 4.0 2.5 2.5 3.5 4.0 9.5 13.0 17.5 13.0 7.0 12.0 12.5 13.0 Max MHz ns Units ns ns ns AC Operating Requirements TA = +25C Symbol Parameter VCC = +5.0V Min tS(H) tS(L) tH(H) tH(L) tS(H) tS(L) tH(H) tH(L) tS(H) tS(L) tH(H) tH(L) tS(H) tS(L) tH(H) tH(L) tW(H) tW(L) Setup Time, HIGH or LOW Pn to CP Hold Time, HIGH or LOW Pn to CP Setup Time, HIGH or LOW CEP or CET to CP Hold Time, HIGH or LOW CEP or CET to CP Setup Time, HIGH or LOW PE to CP Hold Time, HIGH or LOW PE to CP Setup Time, HIGH or LOW U/D to CP Hold Time, HIGH or LOW U/D to CP CP Pulse Width HIGH or LOW 4.0 4.0 3.0 3.0 7.0 5.0 0 0.5 8.0 8.0 1.0 0 11.0 7.0 0 0 4.0 7.0 Max TA = -55C to +125C VCC = +5.0V Min 4.5 4.5 3.5 3.5 8.0 8.0 0 1.0 10.0 10.0 1.0 0 14.0 12.0 0 0 6.0 9.0 Max TA = 0C to +70C VCC = +5.0V Min 4.5 4.5 3.5 3.5 8.0 6.5 0 0.5 9.0 9.0 1.0 0 12.5 8.5 0 0 4.5 8.0 ns ns ns ns ns Max Units 5 www.fairchildsemi.com 74F169 Physical Dimensions inches (millimeters) unless otherwise noted 16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150 Narrow Package Number M16A 16-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide Package Number M16D www.fairchildsemi.com 6 74F169 4-Stage Synchronous Bidirectional Counter Physical Dimensions inches (millimeters) unless otherwise noted (Continued) 16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide Package Number N16E Fairchild does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and Fairchild reserves the right at any time without notice to change said circuitry and specifications. LIFE SUPPORT POLICY FAIRCHILD'S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and (c) whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury to the user. 7 2. A critical component in any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. www.fairchildsemi.com www.fairchildsemi.com |
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