Revised August 1999 74F378 Parallel D-Type Register with Enable General Description Features The 74F378 is a 6-bit register with a buffered common Enable. This device is similar to the 74F174, but with common Enable rather than common Master Reset. ■ 6-bit high-speed parallel register ■ Positive edge-triggered D-type inputs ■ Fully buffered common clock and enable inputs ■ Input clamp diodes limit high-speed termination effects ■ Full TTL and CMOS compatible Ordering Code: Order Number Package Number Package Description 74F378SC M16A 16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150 Narrow 74F378SJ M16D 16-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide 74F378PC N16E 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 © 1999 Fairchild Semiconductor Corporation DS009526 www.fairchildsemi.com 74F378 Parallel D-Type Register with Enable April 1988 74F378 Unit Loading/Fan Out Pin Names U.L. Input IIH/IIL HIGH/LOW Output IOH/IOL Description E Enable Input (Active LOW) 1.0/1.0 20 µA/−0.6 mA D0–D5 Data Inputs 1.0/1.0 20 µA/−0.6 mA CP Clock Pulse Input (Active Rising Edge) 1.0/1.0 20 µA/−0.6 mA Q0–Q5 Outputs 50/33.3 −1 mA/20 mA Truth Table Functional Description The 74F378 consists of six edge-triggered D-type flip-flops with individual D inputs and Q inputs. The Clock (CP) and Enable (E) inputs are common to all flip-flops. Inputs E When the E input is LOW, new data is entered into the register on the LOW-to-HIGH transition of the CP input. When the E input is HIGH the register will retain the present data independent of the CP input. H L L CP Output Dn Qn X No Change H H L L H = HIGH Voltage Level L = LOW Voltage Level X = Immaterial = LOW-to-HIGH Clock Transition Logic Diagram Please note that this diagram is provided only for the understanding of logic operations and should not be used to estimate propagation delays. www.fairchildsemi.com 2 Recommended Operating Conditions Storage Temperature −65°C to +150°C Ambient Temperature under Bias −55°C to +125°C Free Air Ambient Temperature Junction Temperature under Bias −55°C to +150°C Supply Voltage 0°C to +70°C +4.5V to +5.5V −0.5V to +7.0V VCC Pin Potential to Ground Pin Input Voltage (Note 2) −0.5V to +7.0V Input Current (Note 2) −30 mA to +5.0 mA Voltage Applied to Output in HIGH State (with VCC = 0V) Standard Output −0.5V to VCC 3-STATE Output −0.5V 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. Current Applied to Output twice the rated IOL (mA) in LOW State (Max) DC Electrical Characteristics Symbol Parameter Min Typ Max VCC VIL Input LOW Voltage 0.8 V VCD Input Clamp Diode Voltage −1.2 V Min VOH Output HIGH V Min 0.5 V Min IOL = 20 mA 5.0 µA Max VIN = 2.7V 7.0 µA Max VIN = 7.0V 50 µA Max VOUT = VCC V 0.0 3.75 µA 0.0 −0.6 mA Max −150 mA Max VOUT = 0V 45 mA Max VO = LOW VOL Output LOW 10% VCC 2.5 5% VCC 2.7 V Conditions Input HIGH Voltage Voltage 2.0 Units VIH 10% VCC Voltage IIH Input HIGH Current IBVI Input HIGH Current Breakdown Test ICEX Output HIGH Leakage Current VID Input Leakage Test IOD 4.75 Output Leakage Circuit Current IIL Input LOW Current IOS Output Short-Circuit Current ICCL Power Supply Current −60 30 3 Recognized as a HIGH Signal Recognized as a LOW Signal IIN = −18 mA IOH = −1 mA IOH = −1 mA IID = 1.9 µA All Other Pins Grounded VIOD = 150 mV All Other Pins Grounded VIN = 0.5V www.fairchildsemi.com 74F378 Absolute Maximum Ratings(Note 1) 74F378 AC Electrical Characteristics Symbol Parameter TA = +25°C TA = −55°C to +125°C TA = 0°C to +70°C VCC = +5.0V VCC = +5.0V VCC = +5.0V CL = 50 pF CL = 50 pF CL = 50 pF Min Typ fMAX Maximum Input Frequency 80 100 Max Min Max tPLH Propagation Delay 3.0 5.5 7.5 3.0 10.0 3.0 8.5 tPHL CP to Qn 3.5 6.0 8.5 3.5 10.5 3.5 9.5 70 Min Units Max 80 MHz ns AC Operating Requirements Symbol Parameter TA = +25°C TA = −55°C to +125°C VCC = +5.0V VCC = +5.0V Min Max Min Max TA = 0°C to +70°C VCC = +5.0V Min tS(H) Setup Time, HIGH or LOW 4.0 5.0 4.0 tS(L) Dn to CP 4.0 5.0 4.0 tH(H) Hold Time, HIGH or LOW 0 2.0 0 tH(L) Dn to CP 0 2.0 0 tS(H) Setup Time, HIGH or LOW 6.0 4.5 6.0 tS(L) E to CP 10.0 13.0 10.0 tH(H) Hold Time, HIGH or LOW 0 0 0 tH(L) E to CP 0 0 0 tW(H) CP Pulse Width 4.0 5.0 4.0 tW(L) HIGH or LOW 6.0 7.5 6.0 www.fairchildsemi.com 4 Units Max ns ns ns 74F378 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 5 www.fairchildsemi.com 74F378 Parallel D-Type Register with Enable 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: 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. 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. www.fairchildsemi.com www.fairchildsemi.com 6