DESCRIPTION
PIN No SYMBOL NAME AND FUNCTION 1,13 1CLR, 2CLR Asynchronous Reset Direct Input 2, 12 1D, 2D Data Inputs 3, 11 Clock Input 1CK, 2CK (LOW-to-HIGH, Edge-Triggered) 4, 10 1PR, 2PR Asynchronous Set - Direct Input 5, 9 1Q, 2Q True Flip-Flop Outputs duct(s)TRUTH TABLE ProCLR leteL H soL bH - OH )H t(sX : Don’t Care INPUTS PR D HX LX LX HL HH HX Obsolete ProducLOGIC DIAGRAM 6, 8 1Q, 2Q Complement Flip-Flop Outputs 7 GND Ground (0V) 14 Vcc Positive Supply Voltage OUTPUTS CK Q XL XH XH L Q H L H H HL Qn Qn FUNCTION CLEAR PRESET ---------NO CHANGE This logic diagram has not be used to estimate propagation delays 2/10 M74HCT74 ABSOLUTE MAXIMUM RATINGS
Symbol Parameter Value Unit VCC Supply Voltage -0.5 to +7 V VI DC Input Voltage -0.5 to VCC + 0.5 V VO DC Output Voltage -0.5 to VCC + 0.5 V IIK DC Input Diode Current ± 20 mA IOK DC Output Diode Current ± 20 mA IO DC Output Current ± 25 mA ICC or IGND DC VCC or Ground Current ± 50 mA PD Power Dissipation 500(*) mW )Tstg Storage Temperature -65 to +150 °C t(sTL Lead Temperature (10 sec) 300 °C ABSOLUTE MAXIMUM RATINGS
are those values beyond which damage to the device may occur.
STMicroelectronics
