NTE74LS377

NTE74LS377 Integrated Circuit TTL − Octal D−Type Flip−Flop with Enable Description: The NTE74LS377 is a hex monolithic, positive−edge−triggered flip−flop in a 20−Lead plastic DIP type package that utilizes TTL circuitry to implement D−type flip−flop logic with an enable input. The NTE74LS377 is similar to the NTE74LS173 but features a common enable instead of a common clear. Information at the D inputs meeting the setup time requirements is transferred to the Q outputs on the positive−going edge of the clock pulse if the enable input G is low. Clock triggering occurs at a particular voltage level and is not directly related to the transition time of the positive−going pulse. When the clock input is at either the high or ,low level, the D input signal has no effect a the output. The circuit is designed to prevent false clocking by transitions at the G input. The flip−flops are guaranteed to respond to clock frequencies ranging from 0 to 30Mhz while maximum clock frequency is typically 40Mhz. Typical power dissipation is 10mW per flip−flop. Features: D Contains Eight Flip−Flops with Single Rail Outputs D Individual Data Input to Each Flip−Flop Applications: D Buffer/Storage Registers D Shift Registers D Pattern Generators Absolute Maximum Ratings: (Note 1) Supply Voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7V DC Input Voltage, VIN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7V Operating Temperature Range, TA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0C to +70C Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −65C to +150C Note 1. Unless otherwise specified, all voltages are referenced to GND. Recommended Operating Conditions: Parameter Symbol VCC IOH IOL fclock tw tsu Supply Voltage High−Level Output Current Low−Level Output Current Clock Frequency Width of Clock Pulse Setup Time Data Input Enable Active−State Enable Inactive−State Hold Time Operating Temperature Range th TA Min 4.75 − − 0 20 Typ 5.0 − − − − 20 25 10 5 0 − − − − − Max Unit 5.25 V −400 A 8 mA 30 MHz − ns − − − − +70 ns ns ns ns C Electrical Characteristics: (Note 2, Note 3) Parameter Symbol High Level Input Voltage Test Conditions VIH Min Typ Max Unit 2 − − V − − 0.8 V − − −1.5 V 2.7 3.5 Low Level Input Voltage VIL Input Clamp Voltage VIK VCC = MIN, II = −18mA High Level Output Voltage VOH VCC = MIN, VIH = 2V, VIL = MAX, IOH = -400A Low Level Output Voltage VOL VCC = MIN, VIH = 2V, VIL = MAX IOL = 4mA − 0.25 0.4 V IOL = 8mA − 0.35 0.5 V V Input Current II VCC = MAX, VI = 7V − − 0.1 mA High Level Input Current IIH VCC = MAX, VI = 2.7V − − 20 A Low Level Input Current IIL VCC = MAX, VI = 0.4V − − −0.4 mA Short−Circuit Output Current IOS VCC = MAX, Note 4 −20 − −100 mA Supply Current ICC VCC = MAX, Note 5 − 17 28 mA Note 2. .For conditions shown as MIN or MAX, use the appropriate value specified under “Recommended Operation Conditions”. Note 3. All typical values are at VCC = 5V, TA = +25C. Note 4. Not more than one output should be shorted at a time, and duration of the short−circuit should not exceed one second. Note 4. With all outputs open and ground applied to all data inputs, ICC is measured after a momentary ground, then 4.5V is applied to the clock. Switching Characteristics: (VCC = 5V, TA = +25C unless otherwise specified) Parameter Maximum Clock Frequency Symbol fmax Propagation Delay Time, from Clock G H L L X Test Conditions RL = 2k, CL = 15pF Min Typ Max Unit 30 40 − MHz tPLH − 17 27 ns tPHL − 18 27 ns Function Table (Each Flip−Flop): Inputs Outputs Clock Data Q Q X X Q0 Q0  H H L  L L H L X Q0 Q0 Pin Connection Diagram G 1 20 VCC 1Q 2 1D 3 19 8Q 18 8D 2D 4 17 7D 2Q 5 16 7Q 3Q 6 3D 7 15 6Q 14 6D 4D 8 13 5D 4Q 9 12 5Q GND 10 11 CLK 20 11 1 10 .300 (7.62) 1.200 (30.5) Max .260 (6.6) Max .200 (5.08) Max .100 (2.54) Min .012 (0.30) .100 (2.54) Typ .350 (8.89)