{"id":6582,"date":"2026-06-18T15:24:00","date_gmt":"2026-06-18T15:24:00","guid":{"rendered":"https:\/\/materialparts.com\/sn74hc595n\/"},"modified":"2026-06-18T15:24:00","modified_gmt":"2026-06-18T15:24:00","slug":"sn74hc595n","status":"publish","type":"post","link":"https:\/\/materialparts.com\/zh\/sn74hc595n\/","title":{"rendered":"SN74HC595N"},"content":{"rendered":"

\u4ea7\u54c1\u6982\u89c8<\/h2>\n

The SN74HC595N from Texas Instruments is an 8-bit shift register with output latch and 3-state outputs. It converts serial input to 8-bit parallel output using only 3 MCU pins, with daisy-chain capability for unlimited output expansion. Packaged in 16-PDIP.<\/p>\n

\u4e3b\u8981\u89c4\u683c<\/h2>\n\n\n\n\n\n\n\n\n\n
\u903b\u8f91\u5bb6\u65cf<\/td>\n74HC (High-Speed CMOS)<\/td>\n<\/tr>\n
Bits<\/td>\n8-bit shift register + 8-bit output latch<\/td>\n<\/tr>\n
\u7535\u6e90\u7535\u538b<\/td>\n2V to 6V<\/td>\n<\/tr>\n
Shift Frequency<\/td>\n25MHz (typ at 5V)<\/td>\n<\/tr>\n
\u8f93\u51fa\u7535\u6d41<\/td>\n+\/-6mA per output (at 5V)<\/td>\n<\/tr>\n
\u4f20\u64ad\u5ef6\u8fdf<\/td>\n20ns (typ at 5V)<\/td>\n<\/tr>\n
\u5305\u88c5<\/td>\n16-PDIP<\/td>\n<\/tr>\n
\u5de5\u4f5c\u6e29\u5ea6<\/td>\n-40 to +85 C<\/td>\n<\/tr>\n<\/table>\n

\u7279\u70b9<\/h2>\n
    \n
  • 8-bit serial-in, parallel-out shift register<\/li>\n
  • Separate output latch for glitch-free updates<\/li>\n
  • 3-state outputs for bus interface<\/li>\n
  • Daisy-chain serial output (QH’)<\/li>\n
  • Direct clear (SRCLR) for register reset<\/li>\n
  • Output enable (OE) for 3-state control<\/li>\n<\/ul>\n

    \u5e94\u7528<\/h2>\n
      \n
    • Expanding MCU output pins<\/li>\n
    • LED matrix and display driving<\/li>\n
    • Serial-to-parallel data conversion<\/li>\n
    • Daisy-chained I\/O expansion<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The SN74HC595N from Texas Instruments is an 8-bit shift register with output latch and 3-state outputs. It converts serial input to 8-bit parallel output using only 3 MCU pins, with daisy-chain capability for unlimited output expansion. Packaged in 16-PDIP. Key Specifications Logic Family 74HC (High-Speed CMOS) Bits 8-bit shift register + 8-bit output […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[13],"tags":[],"chip_brand":[138],"class_list":["post-6582","post","type-post","status-publish","format-standard","hentry","category-integrated-circuits-ics","chip_brand-ti"],"acf":{"brief_explanation":"8-bit shift register with output latch, 3-state outputs, 25MHz, 16-PDIP","date_code":"","package_case":"16-PDIP","in_stock":7553,"datasheet":"https:\/\/www.ti.com\/lit\/ds\/symlink\/sn74hc595.pdf","price":"$0.35 @ 1ku","product_introduction":"The SN74HC595N from Texas Instruments is an 8-bit shift register with output latch and 3-state outputs that converts serial data from 3 MCU pins (DATA, SRCLK, RCLK) into 8 parallel outputs. The two-stage architecture (shift register + output latch) allows new data to be shifted in while the current output remains stable, eliminating output glitches during updates. The QH' serial output enables daisy-chaining multiple 74HC595 devices for unlimited output expansion while using only 3 MCU pins. The 3-state outputs with Output Enable (OE) allow the device to be connected to a shared bus. With 25MHz shift frequency and +\/-6mA output drive at 5V, it is the most popular IC for LED matrix driving and GPIO expansion.","working_principle":"The 74HC595 contains two 8-bit registers: the shift register and the storage register (output latch). Serial data is clocked into the shift register on the rising edge of SRCLK. When RCLK rises, the shift register contents are copied to the storage register, which drives the Q0-Q7 outputs. This two-stage pipeline allows shifting new data without disturbing the current output. The SRCLR pin asynchronously clears the shift register. The OE pin controls the 3-state output buffers: when OE is high, all outputs are high-impedance; when low, the storage register drives the outputs. The QH' pin outputs the last bit of the shift register, which becomes the first bit of the next daisy-chained device.","pin_description":"
      Pin<\/th>Name<\/th>Function<\/th><\/tr>
      1<\/td>Q1<\/td>Parallel output bit 1<\/td><\/tr>
      2<\/td>Q2<\/td>Parallel output bit 2<\/td><\/tr>
      3<\/td>Q3<\/td>Parallel output bit 3<\/td><\/tr>
      4<\/td>Q4<\/td>Parallel output bit 4<\/td><\/tr>
      5<\/td>Q5<\/td>Parallel output bit 5<\/td><\/tr>
      6<\/td>Q6<\/td>Parallel output bit 6<\/td><\/tr>
      7<\/td>Q7<\/td>Parallel output bit 7<\/td><\/tr>
      8<\/td>GND<\/td>Ground<\/td><\/tr>
      9<\/td>Q7'<\/td>Serial output (for daisy chain)<\/td><\/tr>
      10<\/td>SRCLR<\/td>Shift register clear (active low)<\/td><\/tr>
      11<\/td>SRCLK<\/td>Shift register clock input<\/td><\/tr>
      12<\/td>RCLK<\/td>Storage register clock (latch)<\/td><\/tr>
      13<\/td>OE<\/td>Output enable (active low, 3-state)<\/td><\/tr>
      14<\/td>SER<\/td>Serial data input<\/td><\/tr>
      15<\/td>Q0<\/td>Parallel output bit 0<\/td><\/tr>
      16<\/td>VCC<\/td>Supply voltage (2-6V)<\/td><\/tr><\/table>","application_scenarios":"
      • Expanding MCU GPIO from 3 pins to 8+ outputs using daisy-chain shift registers<\/li>
      • LED matrix and 7-segment display driving with glitch-free latch updates<\/li>
      • Serial-to-parallel data conversion with 25MHz shift rate and 3-state bus<\/li>
      • Home automation relay control boards with unlimited channel expansion<\/li><\/ul>","alternative_models":"
        Model<\/th>Manufacturer<\/th>Key Difference<\/th><\/tr>
        74HC595D<\/td>Nexperia<\/td>SOIC-16 surface mount<\/td><\/tr>
        74HC165N<\/td>TI<\/td>Parallel-in serial-out (reverse direction)<\/td><\/tr>
        TPIC6B595<\/td>TI<\/td>Power shift register, 50V\/150mA, open drain<\/td><\/tr>
        MAX7219<\/td>ADI<\/td>SPI LED driver with current control<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/6582","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/comments?post=6582"}],"version-history":[{"count":0,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/6582\/revisions"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/media?parent=6582"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/categories?post=6582"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/tags?post=6582"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/chip_brand?post=6582"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}