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SN54HCT74 Datasheet(PDF) 1 Page - Texas Instruments |
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SN54HCT74 Datasheet(HTML) 1 Page - Texas Instruments |
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1 / 15 page  SN54HCT74, SN74HCT74 DUAL DTYPE POSITIVEEDGETRIGGERED FLIPFLOPS WITH CLEAR AND PRESET SCLS169E − DECEMBER 1982 − REVISED APRIL 2004 1 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 D Operating Voltage Range of 4.5 V to 5.5 V D Outputs Can Drive Up To 10 LSTTL Loads D Low Power Consumption, 40-µA Max ICC D Typical tpd = 17 ns D ±4-mA Output Drive at 5 V D Low Input Current of 1 µA Max D Inputs Are TTL-Voltage Compatible description/ordering information The ’HCT74 devices contain two independent D-type positive-edge-triggered flip-flops. A low level at the preset (PRE) or clear (CLR) inputs sets or resets the outputs, regardless of the levels of the other inputs. When PRE and CLR are inactive (high), data at the data (D) input meeting the setup time requirements are transferred to the outputs on the positive-going edge of the clock (CLK) pulse. Clock triggering occurs at a voltage level and is not directly related to the rise time of CLK. Following the hold-time interval, data at the D input may be changed without affecting the levels at the outputs. ORDERING INFORMATION TA PACKAGE† ORDERABLE PART NUMBER TOP-SIDE MARKING PDIP − N Tube of 25 SN74HCT74N SN74HCT74N Tube of 50 SN74HCT74D SOIC − D Reel of 2500 SN74HCT74DR HCT74 SOIC − D Reel of 250 SN74HCT74DT HCT74 −40 °C to 85°C SOP − NS Reel of 2000 SN74HCT74NSR HCT74 −40 C to 85 C SSOP − DB Reel of 2000 SN74HCT74DBR HT74 Tube of 90 SN74HCT74PW TSSOP − PW Reel of 2000 SN74HCT74PWR HT74 TSSOP − PW Reel of 250 SN74HCT74PWT HT74 CDIP − J Tube of 25 SNJ54HCT74J SNJ54HCT74J −55 °C to 125°C CFP − W Tube of 150 SNJ54HCT74W SNJ54HCT74W −55 C to 125 C LCCC − FK Tube of 55 SNJ54HCT74FK SNJ54HCT74FK † Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available at www.ti.com/sc/package. Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. 1 2 3 4 5 6 7 14 13 12 11 10 9 8 1CLR 1D 1CLK 1PRE 1Q 1Q GND VCC 2CLR 2D 2CLK 2PRE 2Q 2Q SN54HCT74 ...J OR W PACKAGE SN74HCT74 . . . D, DB, N, NS, OR PW PACKAGE (TOP VIEW) 32 1 20 19 910 11 1213 4 5 6 7 8 18 17 16 15 14 2D NC 2CLK NC 2PRE 1CLK NC 1PRE NC 1Q SN54HCT74 . . . FK PACKAGE (TOP VIEW) NC − No internal connection Copyright 2004, Texas Instruments Incorporated UNLESS OTHERWISE NOTED this document contains PRODUCTION DATA information current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. |
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