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74AHCT595S16 Dataheets PDF



Part Number 74AHCT595S16
Manufacturers Diodes
Logo Diodes
Description 8-BIT SHIFT REGISTER 8-BIT OUTPUT REGISTER
Datasheet 74AHCT595S16 Datasheet74AHCT595S16 Datasheet (PDF)

74AHCT595 8-BIT SHIFT REGISTER 8-BIT OUTPUT REGISTER Description 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 o.

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74AHCT595 8-BIT SHIFT REGISTER 8-BIT OUTPUT REGISTER Description 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. Pin Assignments Features  Supply Voltage Range from 4.5V to 5.5V  Sinks or sources 8mA at VCC = 4.5V  CMOS low power consumption  Schmitt Trigger Action at All Inputs  Inputs accept up to 5.5V  ESD Protection Tested per JESD 22  Exceeds 200-V Machine Model (A115-A)  Exceeds 2000-V Human Body Model (A114-A)  Exceeds 1000-V Charged Device Model (C101C)  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) Applications  General Purpose Logic  Serial to Parallel Data conversion  Capture and hold data for extended periods of time.  Allow simple serial bit streams from a microcontroller to control as many peripheral lines as needed.  Wide array of products such as:  Computer peripherals  Appliances  Industrial control Notes: 1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant. 2. See http://www.diodes.com/quality/lead_free.html for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green" and Lead-free. 3. Halogen- and Antimony-free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and <1000ppm antimony compounds. Click here for ordering information, located at the end of datasheet 74AHCT595 Document number: DS35487 Rev. 3 - 2 1 of 10 www.diodes.com June 2013 © Diodes Incorporated Pin Descriptions Pin Number 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Pin Name Q1 Q2 Q3 Q4 Q5 Q6 Q7 GND Q7S MR SHCP STCP OE DS Q0 Vcc Description Parallel Data Output 1 Parallel Data Output 2 Parallel Data Output 3 Parallel Data Output 4 Parallel Data Output 5 Parallel Data Output 6 Parallel Data Output 7 Ground Serial Data Output Master Reset Input Shift Register Clock Input Storage Register Clock Input Output Enable Input Serial Data Input Parallel Data Output 0 Supply Voltage Logic Diagram Functional Diagram 74AHCT595 74AHCT595 Document number: DS35487 Rev. 3 - 2 2 of 10 www.diodes.com June 2013 © Diodes Incorporated 74AHCT595 Functional Description and Timing Diagram Control Input SHCP STCP OE MR DS Output Q7S Qn X X L L  L NC X  L L  L L X X H L  L Z  X L H  Q6S NC X  L H    L H  NC Q6S QnS QnS Function Low-level asserted on MR clears shift register. Storage register is unchanged Empty shift register transferred to storage register Shift register remains clear;: All Q ouputs in Z state. HIGH is shifted into first stage of Shift Register Contents of each register shifted to next register The content of Q6S has been shifted to Q7S and now appears on device pin Q7S Contents of shift register copied to storage register. With output now in active state the storage resister contents appear on Q outputs. Contents of shift register copied to output register then shift register shifted. H=HIGH voltage state L=LOW voltage state =LOW to HIGH transition X= don’t care – high or low (not floating) NC= No change Z= high-impedance state 74AHCT595 Document number: DS35487 Rev. 3 - 2 3 of 10 www.diodes.com June 2013 © Diodes Incorporated 74AHCT595 Absolute Maximum Ratings (Note 4) (@TA = +25°C, unless otherwise specified.) Symbol Description Rating ESD HBM Human Body Model ESD Protection 2 ESD CDM Charged Device Model ESD Protection 1 ESD MM Machine Model ESD Protection 200 VCC VI Vo IIK IOK IOK IO ICC IGND TJ TSTG PTOT Supply Voltage Range Input Voltage Range Voltage applied to output in high or low state Input Clamp Current VI < -0.5V Output Clamp Current VO <-0.5V Output Clamp Current VO > VCC +0.5V Continuous output current Continuous current through Vcc or GND Continuous current through Vcc or GND Operating Junction Temperature Storage Temperature Total Power Dissipation -0.5 to +7.0 -0.5 to +7.0 -0.5 to VCC +0.5 -20 -20 20 ±25 75 -75 -40 to +150 -65 to +150 500 Notes: 4. Stresses beyond the absolute maximum may result in immediate failure or reduced reliab.


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