M74HCT374 OCTAL D-TYPE FLIP FLOP WITH 3 STATE OUTPUT NON INVERTING HIGH SPEED: f = 50 MHz (TYP.) at V = 4.5V MAX CC LOW POWER DISSIPATION: I = 4A(MAX.) at T =25C CC A COMPATIBLE WITH TTL OUTPUTS : V = 2V (MIN.) V = 0.8V (MAX) IH IL DIP SOP TSSOP BALANCED PROPAGATION DELAYS: t t PLH PHL SYMMETRICAL OUTPUT IMPEDANCE: I = I = 6mA (MIN) OH OL ORDER CODES PIN AND FUNCTION COMPATIBLE WITH PACKAGE TUBE T & R 74 SERIES 374 DIP M74HCT374B1R SOP M74HCT374M1R M74HCT374RM13TR DESCRIPTION TSSOP M74HCT374TTR The M74HCT374 is an high speed CMOS OCTAL D-TYPE FLIP FLOP WITH 3-STATE OUTPUTS NON INVERTING fabricated with silicon gate The output control does not affect the internal 2 C MOS technology. operation of flip-flops that is, the old data can be This 8 bit D-TYPE FLIP FLOP is controlled by a retained or the new data can be entered even clock input (CK) and an output enable input (OE). while the outputs are off. On the positive transition of the clock, the Q The M74HCT374 is designed to directly interface 2 outputs will be set to the logic state that were HSCMOS systems with TTL and NMOS setup at the D inputs. components. While the OE input is at low level, the eight outputs All inputs are equipped with protection circuits will be in a normal logic state (high or low logic against static discharge and transient excess level) and while OE is at high level the outputs will voltage. be in a high impedance state. PIN CONNECTION AND IEC LOGIC SYMBOLS July 2001 1/11 Obsolete Product(s) - Obsolete Product(s)M74HCT374 INPUT AND OUTPUT EQUIVALENT CIRCUIT PIN DESCRIPTION PIN No SYMBOL NAME AND FUNCTION 1OE 3 State Output Enable Input (Active LOW) 2, 5, 6, 9, 12, Q0 to Q7 3 State Outputs 15, 16, 19 3, 4, 7, 8, 13, D0 to D7 Data Inputs 14, 17, 18 11 CK Clock Input (LOW to HIGH, edge triggered) 10 GND Ground (0V) 20 V Positive Supply Voltage CC TRUTH TABLE INPUTS OUTPUT OE CK D Q H XXZ L X NO CHANGE LLL LHH X: Dont Care Z: High Impedance LOGIC DIAGRAM This logic diagram has not be used to estimate propagation delays 2/11 Obsolete Product(s) - Obsolete Product(s)