74AHCT595T16-13 Diodes Incorporated

74AHCT595 8-BIT SHIFT REGISTER 8-BIT OUTPUT REGISTER Description Pin Assignments The 74AHCT595 is an advanced high speed CMOS device that is designed to be pin compatable with 74LS low power Schottky types. An eight bit shift register accepts data from the serial input (DS) on each positive transition of the shift register clock (STCP). When asserted low, the reset function (MR) sets all shift register values to zero and is independent of all clocks. Data from the input serial shift register is placed in the output register with a rising pulse on the storages resister clock (SHCP). With the output enable (OE asserted low the 3-state outputs Q0-Q7 become active and present. All registers capture data on rising edge and change output on the falling edge. If both clocks are connected together, the input shift register is always one clock cycle ahead of the output register. Features Applications Supply Voltage Range from 4.5V to 5.5V General Purpose Logic Sinks or sources 8mA at V = 4.5V Serial to Parallel Data conversion CC CMOS low power consumption Capture and hold data for extended periods of time. Schmitt Trigger Action at All Inputs Allow simple serial bit streams from a microcontroller to control as Inputs accept up to 5.5V many peripheral lines as needed. ESD Protection Tested per JESD 22 Wide array of products such as: Exceeds 200-V Machine Model (A115-A) Computer peripherals Exceeds 2000-V Human Body Model (A114-A) Appliances Exceeds 1000-V Charged Device Model (C101C) Industrial control Latch-Up Exceeds 250mA per JESD 78, Class II Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2) Halogen and Antimony Free. Green Device (Note 3) Notes: 1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant. 2. See 74AHCT595 Pin Descriptions Functional Diagram Pin Number Pin Name Description 1 Q1 Parallel Data Output 1 2 Q2 Parallel Data Output 2 3 Q3 Parallel Data Output 3 4 Q4 Parallel Data Output 4 5 Q5 Parallel Data Output 5 6 Q6 Parallel Data Output 6 7 Q7 Parallel Data Output 7 8 GND Ground 9 Q7S Serial Data Output 10 Master Reset Input MR 11 SHCP Shift Register Clock Input 12 STCP Storage Register Clock Input 13 Output Enable Input OE 14 DS Serial Data Input 15 Q0 Parallel Data Output 0 16 Vcc Supply Voltage Logic Diagram 2 of 10 June 2013 74AHCT595 Diodes Incorporated www.diodes.com Document number: DS35487 Rev. 3 - 2