SN74AHC595PW-P Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
SN74AHC595PW-P is an 8-bit serial-in parallel-out shift register with 3-state output latches from TI's AHC logic family, operating at up to 40 MHz clock frequency in a 16-pin TSSOP package. It supports 2 V to 5.5 V supply voltage with 50 pF load capacitance and 8 mA output sink current per pin, enabling cascading multiple devices for GPIO expansion. RoHS-compliant, available in stock worldwide with fast shipping.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 16
- Lifecycle
- OBSOLETE
- Datasheet
- SN74AHC595PW-P Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- -40.0°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 8-bit serial-in parallel-out shift register with 3-state outputs allows cascading multiple SN74AHC595PW-P devices on a single SPI bus for GPIO port expansion beyond 8 bits
- Up to 40 MHz shift clock frequency enables fast serial data loading in high-throughput LED matrix and display driver applications
- Wide 2 V to 5.5 V supply voltage range with AHC logic levels ensures compatibility across 3.3 V and 5 V microcontroller GPIO without level-shifting hardware
- 16-pin TSSOP package (R-PDSO-G16) balances compact SMT footprint with easy manual soldering for prototype and production PCBs
Applications
SN74AHC595PW-P is widely used for SPI-driven GPIO expansion in microcontroller projects, allowing a 3-wire SPI interface to control 8 or more output pins for LED matrices, relay banks, and segment displays. Multiple devices can be daisy-chained on a single SPI bus with only 3 MCU GPIO pins consumed regardless of the number of expansion outputs, making it ideal for Arduino, STM32, and ESP32 designs needing additional digital outputs. The 3-state output feature also enables bus-sharing in multi-device systems where outputs must be tristated during programming or testing.
Specifications
| Pbfree Code | Yes |
| YTEOL | 0 |
| Count Direction | RIGHT |
| Family | AHC/VHC/H/U/V |
| JESD-30 Code | R-PDSO-G16 |
| Load Capacitance (CL) | 50pF |
| Logic IC Type | SERIAL IN PARALLEL OUT |
| Max Frequency@Nom-Sup | 40000000Hz |
| Max I(ol) | 0.008A |
| Number of Bits | 8 |
| Number of Functions | 1 |
| Output Characteristics | 3-STATE |
| Output Polarity | TRUE |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | TSSOP16,.25 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE, THIN PROFILE, SHRINK PITCH |
| Packing Method | TUBE |
| Power Supply Current-Max (ICC) | 0.04mA |
| Propagation Delay (tpd) | 18.5ns |
| Supply Voltage-Max (Vsup) | 5.5V |
| Supply Voltage-Min (Vsup) | 2V |
| Supply Voltage-Nom (Vsup) | 3.3V |
| Surface Mount | YES |
| Technology | CMOS |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.65mm |
| Terminal Position | DUAL |
| Trigger Type | POSITIVE EDGE |
| fmax-Min | 115MHz |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.60 |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for SN74AHC595PW-P:
Serial In Parallel Out, AHC/VHC/H/U/V Series, 8-Bit, Right Direction, True Output, CMOS, PDSO16
Serial In Parallel Out, AHC/VHC/H/U/V Series, 8-Bit, Right Direction, True Output, CMOS, PDSO16
Serial In Parallel Out, AHC/VHC/H/U/V Series, 8-Bit, Right Direction, True Output, CMOS, PDSO16
Serial In Parallel Out, AHC/VHC/H/U/V Series, 8-Bit, Right Direction, True Output, CMOS, PDSO16
Frequently Asked Questions
How many SN74AHC595PW-P devices can be daisy-chained together and what is the clock speed limit per chain?
SN74AHC595PW-P supports unlimited cascading by connecting the serial output (QH') of one device to the serial input (DS) of the next, sharing a common shift clock and latch clock. Each device operates up to 40 MHz shift clock frequency, so a chain of 4 devices can load 32 output bits in as little as 32 clock cycles — under 1 µs at 40 MHz. The only practical limit is capacitive loading on the serial data line as chain length grows beyond 8 to 10 devices.
What supply voltage range does SN74AHC595PW-P support and how does that affect its use with 3.3 V microcontrollers?
SN74AHC595PW-P operates from 2 V to 5.5 V, making it natively compatible with 3.3 V systems such as STM32, nRF52, and ESP32 microcontrollers. No level-shifting is required when both the MCU and the shift register share a 3.3 V supply, and the AHC input thresholds are designed to accept 3.3 V logic high levels reliably. The same part can also interface with 5 V AVR or PIC microcontrollers without modification.
How does the 3-state output feature of SN74AHC595PW-P help in a multiplexed bus design?
The 3-state (tristate) output enable pin on SN74AHC595PW-P allows all 8 parallel outputs to be driven to high-impedance simultaneously, disconnecting the shift register's outputs from the shared bus. This is useful in multiplexed LED row-column displays where only one row driver should be active at a time, and in bus-sharing architectures where several shift registers drive the same wire but must not conflict. Toggling OE high disables the outputs without losing the data stored in the output latch.
For a 64-LED matrix controller using SN74AHC595PW-P, how many MCU pins and ICs are required?
Driving 64 LEDs with SN74AHC595PW-P requires 8 daisy-chained devices sharing 3 MCU GPIO pins: shift clock, latch clock, and serial data. Only 3 pins are consumed on the microcontroller regardless of LED count, compared to 64 GPIO pins in a direct-drive scheme. Each SN74AHC595PW-P sinks up to 8 mA per output pin, sufficient to drive standard 5 mm LEDs with a 330 Ω series resistor from a 3.3 V supply.
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About Texas Instruments
Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
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