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Part: IN74ALS273DW
Category:
Logic
Description: Octal D-type Flip-flop 20
Company: IK Semiconductor
Datasheet: Download IN74ALS273DW datasheet File size : 288 kB
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TECHNICAL DATA
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OCTAL D-TYPE FLIP-FLOP WITH CLEAR
IN74ALS273
Contains Eight Flip-Flops with Single-Rail Outputs Buffered Clock and Direct Clear Inputs Individual Data Input to Each Flip-Flop Applications Include: Buffer/Storage Registers Shift Registers Pattern Generators DESCRIPTION This monolithic, positive-edge-triggered flip-flop utilizes TTL circuitry to implement D-type flip-flop logic with a direct clear input. 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. Clock triggering occurs at a particular voltage level and is not directly related to the transition time of the positivegoing pulse. When the clock inputs is at either the high or low level, the D input signal has no effect at the output. The IN74ALS273 is characterized for operation from 0oC to 70oC.
ORDERING INFORMATION IN74ALS273N Plastic IN74ALS273DW SOIC TA = 0° to 70° C for all packages
Function Table and Logic Symbol (each flip-flop) INPUTS CLEAR L H H H CLOCK X I I L D X H L X OUTPUT Q L H L Qo
CLR CLK 1D 2D 3D 4D 5D 6D 7D 8D (1) (11) (3) (4) (7) (8) (13) (14) (17) (18) R C1 (2) 1Q (5) 2Q (6) 3Q (9) 4Q (12) 5Q (15) 6Q (16) 7Q (19) 8Q
1D
IN74ALS273
ABSOLUTE MAXIMUM TEMPERATURE RANGE RATINGS OVER OPERATING 7V 7V 0oC to 70oC -65oC to 150oC FREE-AIR
Supply voltage, Vcc Input voltage, Vl Operating free-air temperature range, TA Storage temperature range RECOMMENDED OPERATING CONDITIONS VCC VIH VIL IOH IOL fclock tW tsu tly TA Supply voltage High-level input voltage Low-level input voltage High-level output current Low-level output current Clock frequency CLR low Pulse duration CLK high CLK low Setup time Data before CLKI Clear inactive state Hold time, data after CLKI Operating free-air temperature
MIN 4.5 2
0 10 14 14 10 15 0 0
NOM MAX UNIT 5 5.5 V V 0.8 V -2.6 mA 24 mA 35 MHz ns ns ns ns o C
70
ELECTRICAL CHARACTERISTICS OVER RECOMMENDED OPERATING FREEAIR TEMPERATURE RANGE Parameter VIK VCC= 4.5V VOH VCC= 4.5V to 5.5V VCC= 4.5V VOL VCC= 4.5V II IIH IIL IO* ICCH ICCL VCC= 5.5V VCC= 5.5V VCC= 5.5V VCC= 5.5V VCC= 5.5V VCC= 5.5V Test Conditions II =-18mA IOH =-0.4mA IOH =-2.6mA IOL =12mA IOL =24mA VI =7V VI =2.7V VI =0.4V VO=2.25V TYP** MAX UNIT -1.5 V VCC-2 V 2.4 3.2 0.25 0.4 V 0.35 0.5 V 0.1 mA 20 ľA -0.2 mA -30 -112 mA 11 20 mA 19 29 mA MIN
*-The output conditions have been chosen to produce a current that closely approximates one half of the true short-circuit output current, IOS **-All typical values are at VCC=5V, TA=25oC
2
IN74ALS273
SWITCHING CHARACTERISTICS Parameter From (input) To (output) VCC =4.5 V to 5.5V CL = 50 pF RL=500 TA =MIN to MAX MIN 35 4 2 3 MAX 18 12 15 MHz ns ns UNIT
fmax tPHL tPLH tPHL
CLR CLK
Any Q Any Q
3
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