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Nexperia USA Inc. 74HCT595DB,118
- Part No.:
- 74HCT595DB,118
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Shift Registers
- Package:
- 16-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
74HCT595DB,118.pdf
- Description:
- IC 8BIT SHIFT REGISTER 16SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,158
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Product details
Overview
74HCT595DB,118 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. It operates from 4.5 V to 5.5 V, supports up to 52 MHz shift clock frequency at 5 V, and drives 8 parallel outputs (Q0–Q7) or cascaded serial output (Q7S). Used in LED matrix drivers and microcontroller GPIO expansion where level-shifted serial-to-parallel conversion is required.
For engineers reviewing the 74HCT595DB,118 datasheet, 74HCT595DB,118 pinout, 74HCT595DB,118 application, or 74HCT595DB,118 equivalent, this device delivers deterministic timing for synchronous data latching, low-power CMOS logic with TTL input thresholds, and robust 3-state output control for bus sharing - critical for embedded control systems with limited I/O resources.
Technical Context
The 74HCT595DB,118 implements dual-register architecture: an 8-stage shift register clocks data in via DS on SHCP rising edges, while a separate storage register captures that data on STCP rising edges - enabling independent shift and latch timing. Its TTL-level inputs (VIH = 2.0 V min, VIL = 0.8 V max at VCC = 5 V) ensure compatibility with legacy 5 V microcontrollers without level-shifting.
Outputs are actively driven high/low when OE is LOW; asserting OE HIGH places Q0–Q7 in high-impedance state without affecting internal register contents. The MR input asynchronously clears only the shift register (not storage), and all inputs include clamp diodes for safe interfacing to voltages beyond VCC using current-limiting resistors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Family | 74HCT - TTL-compatible input thresholds with CMOS output drive and low static power |
| Supply Voltage | 4.5 V to 5.5 V - matches standard 5 V systems; excludes 2–6 V HC range |
| Max Shift Clock (fmax) | 52 MHz at VCC = 5 V - enables >10 Mbps serial data loading for real-time display updates |
| Propagation Delay | SHCP→Q7S: 42 ns typ; STCP→Qn: 40 ns typ - ensures sub-50 ns timing margin for 20 MHz latched output updates |
| Output Drive | ±6 mA per Qn pin at VCC = 5 V - sufficient to directly drive LEDs or interface to 74-series inputs without buffers |
| Operating Temperature | −40 °C to +125 °C - qualified for automotive under-hood and industrial motor-control environments |
| ESD Rating | HBM >2000 V, CDM >1000 V - meets IEC 61000-4-2 Level 3 for board-level robustness |
Pinout & Package
74HCT595DB,118 uses the SOT338-1 (SSOP16) package: plastic shrink small outline, 16 leads, 0.65 mm pitch, body width 5.3 mm. Pin 1 index located at top-left corner with notch marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Q0) | Parallel output bit 0 | LSB of latched 8-bit parallel output; synchronized to STCP edge, enabled by OE |
| 2 (Q1) | Parallel output bit 1 | Second bit of storage register output; electrically identical to Q0, Q2–Q7 |
| 3 (Q2) | Parallel output bit 2 | Third bit of latched parallel bus; shares same 3-state control and timing as Q0–Q7 |
| 4 (Q3) | Parallel output bit 3 | Fourth bit of 8-bit output latch; used in nibble-aligned display or sensor readout |
| 5 (Q4) | Parallel output bit 4 | Fifth bit of parallel output group; supports segmented control in multi-digit LED drivers |
| 6 (Q5) | Parallel output bit 5 | Sixth bit of storage register; enables full byte-wide peripheral control from serial stream |
| 7 (Q6) | Parallel output bit 6 | Seventh bit of latched output; critical for MSB-aligned data transfer in SPI-based systems |
| 8 (GND) | Ground reference | 0 V return for all internal logic and output drivers; must be low-impedance for noise immunity |
| 9 (Q7S) | Serial output | MSB of shift register (Q7); enables daisy-chaining multiple 74HCT595s without external wiring |
| 10 (MR) | Master reset | Asynchronous active-LOW input; clears shift register only - leaves storage register unchanged |
| 11 (SHCP) | Shift clock | Rising-edge-triggered clock for serial data entry into shift register; tolerant of slow edges |
| 12 (STCP) | Storage clock | Rising-edge-triggered clock transferring shift register contents to output latches; decoupled from SHCP |
| 13 (OE) | Output enable | Active-LOW control for 3-state outputs; no effect on internal registers - enables bus sharing |
| 14 (DS) | Serial data input | Data entered on SHCP rising edge; first bit shifted becomes Q0 after eight clocks |
| 15 (Q7) | Parallel output bit 7 | MSB of latched parallel output; synchronized to STCP, disabled when OE = HIGH |
| 16 (VCC) | Supply voltage | +5 V nominal supply; powers both logic core and output drivers; bypass capacitor required |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent clocks | Separate SHCP and STCP allow pipelined operation: new data can shift in while previous data is latched and output |
| TTL-compatible inputs | VIH = 2.0 V min, VIL = 0.8 V max at 5 V - interoperates directly with 5 V MCUs, FPGAs, and legacy logic |
| 3-state parallel outputs | OE-controlled high-impedance mode permits shared bus operation without contention or external tri-state logic |
| Asynchronous shift register clear | MR resets only the shift register - preserves previously latched data in storage register during reinitialization |
| Clamp diode inputs | Internal diodes allow safe connection to signals exceeding VCC (e.g., 12 V sensors) when used with series current-limiting resistors |
| Industrial temperature range | −40 °C to +125 °C operation - validated for use in motor drives, power supplies, and automotive ECUs |
Applications
| LED Matrix Driver | Microcontroller GPIO Expander |
|---|---|
|
Use Scenario: Driving 8×8 monochrome LED displays using SPI-connected microcontrollers with limited parallel I/O. IC Role / Device Role / Timing Role: Serial-to-parallel converter that accepts SPI MOSI data and clocks it into Q0–Q7 outputs synchronized to STCP for stable column/row activation. Use Value: Eliminates need for dedicated parallel port; enables single-SPI-pin expansion of 8 controllable outputs with precise timing control over latch vs. shift phases. |
Use Scenario: Adding digital output capability to resource-constrained ARM Cortex-M0+ MCUs in smart sensor nodes. IC Role / Device Role / Timing Role: Output latch buffer that holds actuator control states (e.g., relay ON/OFF) independently of ongoing serial communication. Use Value: Prevents flicker or glitch during data shifting - storage register maintains steady outputs while new commands load into shift register. |
| Industrial PLC Output Module | Automotive Body Control Unit |
|
Use Scenario: Controlling 8 solenoid valves in factory automation panels using isolated RS-485 command streams. IC Role / Device Role / Timing Role: Isolated serial interface translator that converts differential bus data into galvanically separated parallel control signals. Use Value: MR input allows system-wide reset of pending shift data without disturbing latched valve states - critical for fail-safe shutdown sequences. |
Use Scenario: Managing interior lighting zones (dome, map, footwell) in vehicles where EMI resilience and thermal stability are mandatory. IC Role / Device Role / Timing Role: Robust output driver with 125 °C rating and HBM >2 kV ESD protection for direct connection to LIN or CAN subsystems. Use Value: OE pin enables dynamic output disabling during sleep mode - reduces quiescent current to <100 μA while preserving latch state across wake cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial-to-parallel shift register applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 74HC595DB,118 | CMOS inputs (VIH = 3.15 V min at 4.5 V); wider 2–6 V supply range | Better suited for mixed-voltage systems (e.g., 3.3 V MCU driving 5 V peripherals) | Select when interfacing with 3.3 V logic or requiring broader VCC flexibility |
| SN74HC595PWR | Texas Instruments part in TSSOP-16; identical logic function but different thermal resistance and traceability | Approved for TI-specific design ecosystems; slightly higher ICC (160 μA max vs. 80 μA) | Choose for TI-design continuity or when sourcing from TI-authorized channels |
Compared with 74HC595DB,118 and SN74HC595PWR, the 74HCT595DB,118 provides guaranteed TTL-level compatibility at 5 V - eliminating input threshold uncertainty in legacy 5 V designs - while maintaining identical pinout, timing, and 3-state behavior for drop-in replacement where input drive strength matches.
Availability
74HCT595DB,118 is available at Aetrix Electronics and suitable for LED display drivers, microcontroller GPIO expansion, industrial PLC output modules, and automotive body control units requiring stable component supply across extended temperature ranges.
Supply support for 74HCT595DB,118 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 focused on essential efficiency technologies, delivering high-performance logic, analog, and discrete components for automotive, industrial, and consumer markets.
The 74HCT595 belongs to Nexperia's standard logic portfolio designed specifically for robust, pin-compatible replacements in 5 V TTL-legacy systems - emphasizing reliability, wide temperature operation, and ESD-hardened interfaces.
FAQ
Can 74HCT595DB,118 operate at 3.3 V?
No - the 74HCT595DB,118 is specified only for 4.5 V to 5.5 V operation. Its TTL-compatible inputs require minimum 2.0 V VIH, which is not guaranteed below 4.5 V supply. For 3.3 V systems, use the 74HC595DB,118 variant instead, which supports 2.0–6.0 V and has CMOS input thresholds.
What is the maximum recommended capacitive load on Q0–Q7 outputs?
The datasheet specifies reliable operation with ≤50 pF total load capacitance per output, including PCB trace and downstream input capacitance. Exceeding this may increase propagation delay beyond 60 ns and cause setup/hold violations in high-speed latching; add series 22 Ω resistors if driving >30 pF.
How does MR interact with the storage register during reset?
The MR input affects only the shift register - it asynchronously clears all eight stages to zero but leaves the storage register and its Q0–Q7 outputs unchanged. This allows safe reinitialization of incoming serial data without disrupting currently active parallel outputs.
Is the Q7S output inverted relative to Q7?
No - Q7S is the non-inverted serial output of the shift register's Q7 stage. It mirrors the value present at Q7 *before* the latest SHCP edge; after the edge, Q7S reflects the prior Q6 value due to shift-through behavior, but polarity remains true - no inversion occurs in normal operation.
74HCT595DB,118 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- 74HCT
- Package/Case:
- 16-SSOP (0.209", 5.30mm Width)
- Packaging:
- Tape & Reel (TR)
- 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,118 FAQ
1.How can I place an order for 74HCT595DB,118 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74HCT595DB,118 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,118 reliable?
The price and inventory of 74HCT595DB,118 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74HCT595DB,118 is usually 5 days.
3.What payment methods are accepted for 74HCT595DB,118?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74HCT595DB,118 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74HCT595DB,118?
74HCT595DB,118 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74HCT595DB,118 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,118?
For technical support, including 74HCT595DB,118 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74HCT595DB,118 requirements.
6.How does Aetrix verify that 74HCT595DB,118 is sourced from the original manufacturer or authorized distributors?
All 74HCT595DB,118 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,118 meets industry standards.
7.What is the process for return or replacement of 74HCT595DB,118?
All 74HCT595DB,118 units undergo pre-shipment inspection (PSI). If there is an issue with 74HCT595DB,118, 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,118 part is unused and in its original packaging.
Return procedure for 74HCT595DB,118:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
74HCT595DB,118 Tags
-
SN74HC164DR
Texas Instruments
-
SN74HC595DR
Texas Instruments
-
74HC595PW,118
Nexperia USA Inc.
-
SN74HC165PWR
Texas Instruments
-
HEF4094BT,653
Nexperia USA Inc.
-
74HC595D,118
Nexperia USA Inc.
-
SN74HC595PWR
Texas Instruments
-
74HC165D,653
Nexperia USA Inc.
-
SN74LV165APWR
Texas Instruments
-
74HC595BQ,115
Nexperia USA Inc.
-
74HC165BQ,115
Nexperia USA Inc.
-
CD4094BPWR
Texas Instruments
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