DM74LS564 Octal D-Type Flip-Flop with TRI-STATEÉ Outputs General Description Features The ’LS564 is a high speed low power octal flip-flop with a buffered common Clock (CP) and a buffered common Output Enable (OE). The information presented to the D inputs is stored in the flip-flops on the LOW-to-HIGH Clock (CP) transition This device is functionally identical to the ’LS574, but has inverted outputs. For complete discussions of operations, truth tables, AC and DC electrical specifications, refer to the ’LS374 data sheet. Y Connection Diagram Logic Symbol Y Y Y Y Inputs and outputs on opposite sides of package allowing easy interface with microprocessors Useful as input or output port for microprocessors Functionally identical to ’LS574 Input clamp diodes limit high speed termination effects Fully TTL and CMOS compatible Dual-In-Line Package TL/F/10191 – 2 VCC e Pin 20 GND e Pin 10 TL/F/10191 – 1 Order Number DM74LS564WM or DM74LS564N See NS Package Number M20B or N20A Pin Names D0–D7 CP OE O0 – O7 Description Data Inputs Clock Pulse Input (Active Rising Edge) TRI-STATEÉ Output Enable Input (Active LOW) TRI-STATE Outputs TRI-STATEÉ is a registered trademark of National Semiconductor Corporation. C1995 National Semiconductor Corporation TL/F/10191 RRD-B30M105/Printed in U. S. A. DM74LS564 Octal D-Type Flip-Flop with TRI-STATE Outputs February 1992 Absolute Maximum Ratings (Note) Note: The ‘‘Absolute Maximum Ratings’’ are those values beyond which the safety of the device cannot be guaranteed. The device should not be operated at these limits. The parametric values defined in the ‘‘Electrical Characteristics’’ table are not guaranteed at the absolute maximum ratings. The ‘‘Recommended Operating Conditions’’ table will define the conditions for actual device operation. If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/Distributors for availability and specifications. Supply Voltage Input Voltage Operating Free Air Temperature Range DM74LS 7V 7V 0§ C to a 70§ C b 65§ C to a 150§ C Storage Temperature Range Recommended Operating Conditions Symbol DM74LS564 Parameter VCC Supply Voltage VIH High Level Input Voltage VIL Low Level Input Voltage Units Min Nom Max 4.75 5 5.25 V 2 V 0.8 V mA IOH High Level Output Current b 2.6 IOL Low Level Output Current 24 mA TA Free Air Operating Temperature 70 §C 0 Electrical Characteristics over recommended operating free air temperature range (unless otherwise noted) Symbol Parameter Conditions Min Typ (Note 1) Max Units b 1.5 V VI Input Clamp Voltage VCC e Min, II e b18 mA VOH High Level Output Voltage VCC e Min, IOH e Max, VIL e Max VOL Low Level Output Voltage VCC e Min, IOL e Max, VIH e Min 0.35 0.5 IOL e 12 mA, VCC e Min 0.25 0.4 II Input Current @ Max Input Voltage VCC e Max, VI e 7V IIH High Level Input Current VCC e Max, VI e 2.7V 20 mA IIL Low Level Input Current VCC e Max, VI e 0.4V b 0.4 mA IOS Short Circuit Output Current VCC e Max (Note 2) b 130 mA ICC Supply Current VCC e Max 60 mA IOZH TRI-STATE Output OFF Current HIGH VCC e Max, VO e 2.4V 20 mA IOZL TRI-STATE Output OFF Current LOW VCC e Max, VO e 0.4V b 20 mA 2.4 V 0.1 b 30 Note 1: All typicals are at VCC e 5V, TA e 25§ C. Note 2: Not more than one output should be shorted at a time, and the duration should not exceed one second. 2 3.4 V mA Switching Characteristics VCC e a 5.0V, TA e a 25§ C Symbol Parameter Min Max Units tPLH tPHL Propagation Delay CP to On 28 28 ns tPZH tPZL Enable Time OE to On 28 28 ns tPHZ tPLZ Enable Time OE to On 20 25 ns ts Setup Time Dn to CP 20 ns th Hold Time Dn to CP 5 ns tw (H) tw (L) Pulse Width (HIGH/LOW) CP 20 15 ns Physical Dimensions inches (millimeters) 20-Lead Wide Small Outline Molded Package (M) Order Number DM74LS564WM NS Package Number M20B 3 DM74LS564 Octal D-Type Flip-Flop with TRI-STATE Outputs Physical Dimensions inches (millimeters) (Continued) 20-Lead Molded Dual-In-Line Package (N) Order Number DM74LS564N NS Package Number N20A LIFE SUPPORT POLICY NATIONAL’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 NATIONAL SEMICONDUCTOR CORPORATION. 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