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Nexperia USA Inc. 74HCT595DB,112
- Part No.:
- 74HCT595DB,112
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Shift Registers
- Package:
- 16-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
74HCT595DB,112.pdf
- Description:
- IC 8BIT SHIFT REGISTER 16-SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,154
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Product details
Overview
74HCT595DB,112 from Nexperia is an 8-bit serial-in/serial-or-parallel-out shift register with separate shift and storage registers, 3-state outputs, TTL-compatible inputs, and asynchronous master reset (MR). It operates from 4.5 V to 5.5 V, supports up to 52 MHz shift clock frequency at 5 V, and delivers parallel output drive capability of ±6 mA per Qn pin. It is used in LED matrix drivers and microcontroller GPIO expansion where serial-to-parallel conversion with output latching is required.
For engineers reviewing the 74HCT595DB,112 datasheet, 74HCT595DB,112 pinout, 74HCT595DB,112 application, or 74HCT595DB,112 equivalent, key selection criteria include TTL-level input compatibility, 3-state output control via OE, independent SHCP/STCP clocks for precise data staging, and SO16 package suitability for through-hole and reflow assembly in industrial control panels.
Technical Context
The device implements a two-stage pipeline: an 8-bit shift register accepting serial data on DS at rising SHCP edges, and an independent 8-bit storage register loaded on rising STCP edges. This separation enables concurrent shifting and latched output presentation - critical for glitch-free display updates and synchronized I/O expansion.
Its TTL-compatible inputs (VIH = 2.0 V min, VIL = 0.8 V max at VCC = 5 V) ensure direct interfacing with legacy MCU peripherals without level-shifting. The 3-state outputs (enabled by active-low OE) allow bus sharing and daisy-chained cascading via Q7S, while MR provides synchronous reset of the shift register only - leaving stored outputs unaffected until next STCP.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Family | 74HCT - TTL-compatible input thresholds, CMOS output drive, enabling direct connection to 5 V microcontrollers. |
| Supply Voltage | 4.5 V to 5.5 V - matches standard 5 V systems; excludes 3.3 V operation unlike 74HC variants. |
| Max Shift Clock (fmax) | 52 MHz at VCC = 5 V - supports high-speed serial loading (e.g., >400 kbps for 8-bit frames). |
| Output Drive | ±6 mA per Qn pin at VCC = 5 V - sufficient to directly drive LEDs or logic inputs without external buffers. |
| Propagation Delay | tpd = 25 ns (SHCP→Q7S), 24 ns (STCP→Qn) at VCC = 5 V - ensures tight timing margins in real-time control loops. |
| Operating Temperature | −40 °C to +125 °C - qualified for under-hood automotive and industrial motor control environments. |
| ESD Rating | HBM >2000 V, CDM >1000 V - robust against handling and board-level ESD events in manufacturing. |
Pinout & Package
74HCT595DB,112 uses the SO16 (SOT109-1) plastic small outline package: 16-pin, 3.9 mm body width, 1.27 mm lead pitch, surface-mount or through-hole compatible.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1–7, 15 | Q0–Q7 parallel outputs | Active-drive or high-impedance outputs; Q0 is LSB, Q7 is MSB; all controlled by OE. |
| 8 | GND | Ground reference for all internal logic and output stages; must be low-impedance. |
| 9 | Q7S serial output | MSB-shifted serial output for cascading multiple devices; no internal buffering delay. |
| 10 | MR (Master Reset) | Asynchronous active-low reset of shift register only; storage register and outputs unchanged. |
| 11 | SHCP (Shift Clock) | Rising-edge-triggered clock for serial data entry into shift register; edge-sensitive timing path. |
| 12 | STCP (Storage Clock) | Rising-edge-triggered clock transferring shift register contents to output latches; decouples load timing from shift timing. |
| 13 | OE (Output Enable) | Active-low 3-state control; does not affect internal registers - outputs go Hi-Z immediately. |
| 14 | DS (Data Serial Input) | Primary serial data input; sampled on SHCP rising edge; accepts standard logic levels. |
| 16 | VCC | Positive supply rail; must be decoupled locally (e.g., 100 nF ceramic) near pin 16. |
Key Features
| Feature | Design Value |
|---|---|
| Independent shift/storage clocks | Enables continuous serial loading while holding stable parallel outputs - essential for flicker-free LED displays. |
| TTL-compatible inputs | VIH ≥ 2.0 V, VIL ≤ 0.8 V at 5 V allows direct interface with legacy 5 V MCUs (e.g., ATmega328P, PIC16F) without level shifters. |
| 3-state parallel outputs | OE-controlled Hi-Z state permits shared bus operation and multi-device output multiplexing in modular I/O systems. |
| Asynchronous master reset | MR clears only the shift register - preserves latched display data during re-initialization sequences. |
| High noise immunity | CMOS design with hysteresis-free inputs and >40 % noise margin at 5 V ensures reliable operation in electrically noisy PLC cabinets. |
Applications
| LED Matrix Display Driver | Microcontroller GPIO Expander |
|---|---|
|
Use Scenario: Driving 8×8 monochrome LED arrays in industrial HMI panels requiring persistent, flicker-free illumination. IC Role / Device Role / Timing Role: Serial-to-parallel converter with output latching; receives SPI-like bitstream from MCU and presents stable column/row drive signals. Use Value: Eliminates need for dedicated display controller ICs; reduces MCU GPIO count by 8 pins per device; enables daisy-chaining for larger matrices. |
Use Scenario: Extending digital I/O on resource-constrained embedded controllers (e.g., STM32F030, ESP32-C3) in smart sensor nodes. IC Role / Device Role / Timing Role: Synchronous I/O expander with latch isolation; accepts serial commands and holds output states independently of MCU activity. Use Value: Provides deterministic, jitter-free output timing; OE pin allows safe hot-swap of peripheral modules without bus contention. |
| Industrial Relay Control Bank | Automotive Body Control Module |
|
Use Scenario: Controlling 8-channel 12 V relay banks in factory automation cabinets where EMI resilience and thermal stability are critical. IC Role / Device Role / Timing Role: Level-translating serial interface with robust output drive; interfaces 3.3 V/5 V logic to relay driver transistors. Use Value: ±6 mA output current drives base of BC817-40 transistors directly; −40 °C to +125 °C rating ensures reliability in unventilated enclosures. |
Use Scenario: Managing interior lighting zones (dome, map, courtesy) in automotive BCMs with strict AEC-Q100 alignment requirements. IC Role / Device Role / Timing Role: Cascadable shift register with latch hold; synchronizes light activation across multiple zones using single SPI bus. Use Value: MR pin enables system-wide reset on power-up; 3-state outputs prevent backfeeding during sleep mode transitions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit serial-to-parallel shift register applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 74HC595D,112 | CMOS-input variant (VIH = 3.15 V min at 4.5 V); wider 2.0–6.0 V supply range; lower drive (±4 mA). | Suitable for mixed-voltage systems (e.g., 3.3 V MCU + 5 V peripherals); less tolerant of marginal TTL-level signals. | Select when interfacing with 3.3 V logic or requiring broader VCC flexibility; avoid if driving heavy loads or using legacy 5 V TTL sources. |
| SN74HC595PWR | Texas Instruments part in TSSOP-16; identical logic function; slightly higher ICC (160 μA vs 80 μA typical at 5 V). | Same pinout and timing but different thermal profile (TSSOP vs SO16); requires requalification for high-reliability thermal cycling. | Choose for TI-design ecosystems or space-constrained PCBs; verify solder joint reliability under thermal shock per IPC-J-STD-020. |
Compared with 74HC595D,112, the 74HCT595DB,112 offers guaranteed TTL-level compatibility and stronger output drive, making it preferable in legacy 5 V systems; versus SN74HC595PWR, it provides superior thermal robustness in SO16 and tighter parametric consistency across temperature extremes.
Availability
74HCT595DB,112 is available at Aetrix Electronics and suitable for LED display drivers, microcontroller GPIO expansion, industrial relay control banks, and automotive body control modules requiring stable component supply across extended temperature ranges.
Supply support for 74HCT595DB,112 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Nexperia is a global semiconductor expert delivering high-performance, reliable components for automotive, industrial, and consumer electronics, with leadership in logic, analog, and MOSFET technologies.
The 74HCT595 belongs to Nexperia's industry-standard 74-series logic family, designed specifically for robust, drop-in replacement of legacy TTL and CMOS shift registers in cost-sensitive, high-volume applications demanding long-term supply stability.
FAQ
Can 74HCT595DB,112 operate at 3.3 V?
No. The 74HCT595DB,112 is specified only for 4.5 V to 5.5 V operation. Its TTL-compatible inputs require minimum 2.0 V VIH at 5 V, which is not guaranteed below 4.5 V. For 3.3 V systems, use the 74HC595D,112 variant instead, which supports 2.0–6.0 V and has CMOS input thresholds.
What is the maximum recommended cascade length?
Up to 16 devices can be cascaded reliably using Q7S-to-DS connections, assuming proper signal integrity: controlled-impedance routing, <10 cm trace lengths, and local VCC decoupling per device. Propagation delay accumulates linearly (~25 ns per stage), limiting maximum clock rate in long chains - e.g., 8-stage chain limits fmax to ~12 MHz for full-frame update.
Does MR affect the storage register or output states?
No. MR resets only the 8-bit shift register to zero; the storage register, parallel outputs (Q0–Q7), and serial output (Q7S) retain their last latched values until the next STCP pulse. This allows safe initialization of serial data flow without disrupting active outputs - critical for live display or control systems.
Is the SO16 package RoHS-compliant and lead-free?
Yes. The 74HCT595DB,112 in SO16 (SOT109-1) packaging meets RoHS Directive 2011/65/EU and is fully lead-free, with matte tin termination and halogen-free molding compound. It is rated for lead-free reflow per JEDEC J-STD-020, peak temperature 260 °C, 10-second duration.
74HCT595DB,112 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- 74HCT
- Package/Case:
- 16-SSOP (0.209", 5.30mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Logic Type:
- Shift Register
- Output Type:
- Tri-State
- Number of Elements:
- 1
- Number of Bits per Element:
- 8
- Function:
- Serial to Parallel, Serial
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SSOP
74HCT595DB,112 FAQ
1.How can I place an order for 74HCT595DB,112 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74HCT595DB,112 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for 74HCT595DB,112 reliable?
The price and inventory of 74HCT595DB,112 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74HCT595DB,112 is usually 5 days.
3.What payment methods are accepted for 74HCT595DB,112?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74HCT595DB,112 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74HCT595DB,112?
74HCT595DB,112 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74HCT595DB,112 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for 74HCT595DB,112?
For technical support, including 74HCT595DB,112 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74HCT595DB,112 requirements.
6.How does Aetrix verify that 74HCT595DB,112 is sourced from the original manufacturer or authorized distributors?
All 74HCT595DB,112 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that 74HCT595DB,112 meets industry standards.
7.What is the process for return or replacement of 74HCT595DB,112?
All 74HCT595DB,112 units undergo pre-shipment inspection (PSI). If there is an issue with 74HCT595DB,112, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The 74HCT595DB,112 part is unused and in its original packaging.
Return procedure for 74HCT595DB,112:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
74HCT595DB,112 Tags
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SN74HC164DR
Texas Instruments
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SN74HC595DR
Texas Instruments
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74HC595PW,118
Nexperia USA Inc.
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SN74HC165PWR
Texas Instruments
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HEF4094BT,653
Nexperia USA Inc.
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74HC595D,118
Nexperia USA Inc.
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SN74HC595PWR
Texas Instruments
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74HC165D,653
Nexperia USA Inc.
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SN74LV165APWR
Texas Instruments
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74HC595BQ,115
Nexperia USA Inc.
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74HC165BQ,115
Nexperia USA Inc.
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CD4094BPWR
Texas Instruments
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