My Inquiry
My Account
Nexperia USA Inc. 74AHCT594DB-Q100J
- Part No.:
- 74AHCT594DB-Q100J
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Shift Registers
- Package:
- 16-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
74AHCT594DB-Q100J.pdf
- Description:
- IC SHIFT REGISTER 8BIT 16-SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,391
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
74AHCT594DB-Q100 from Nexperia is an automotive-grade 8-bit serial-in, parallel-out shift register with independent storage register, TTL-compatible input thresholds (VIH = 2.0 V, VIL = 0.8 V), dual positive-edge clocks (SHCP/STCP), and active-low asynchronous resets (SHR/STR). It operates from 4.5 V to 5.5 V across –40 °C to +125 °C and supports cascading via Q7S output - used in automotive LED driver control and remote I/O expansion.
For engineers reviewing the 74AHCT594DB-Q100 datasheet, 74AHCT594DB-Q100 pinout, 74AHCT594DB-Q100 application, or 74AHCT594DB-Q100 equivalent, key selection criteria include TTL-level input compatibility, independent shift/storage clock timing, AEC-Q100 Grade 1 qualification, and SSOP16 package suitability for space-constrained automotive PCBs.
Technical Context
This device implements a two-stage pipeline: an 8-bit shift register accepting serial data on DS with SHCP-triggered shifting, followed by an 8-bit D-type storage register loaded on STCP edges. Both registers feature dedicated reset inputs (SHR, STR) that operate asynchronously and independently.
The architecture enables precise timing separation between data capture and output latching - critical for glitch-free LED column driving and synchronized sensor data staging. All inputs include Schmitt-trigger action and are overvoltage tolerant up to 5.5 V, supporting mixed-voltage system interfacing without level shifters.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Family | AHCT - TTL-compatible input thresholds (VIH ≥ 2.0 V, VIL ≤ 0.8 V) ensure direct interface with legacy microcontrollers and logic without level translation. |
| Supply Voltage Range | 4.5 V to 5.5 V - matches standard automotive 5 V rail; supports operation under cold-crank and load-dump conditions when paired with appropriate regulators. |
| Operating Temperature | –40 °C to +125 °C - qualified per AEC-Q100 Grade 1, enabling use in engine bay and powertrain control modules. |
| Max Clock Frequency | 160 MHz (VCC = 5 V, CL = 15 pF) - allows high-speed serial loading for real-time display multiplexing or fast I/O expansion. |
| Propagation Delay | tPLH/tPHL ≤ 7.8 ns (VCC = 5 V, CL = 50 pF) - ensures tight timing margins in synchronous systems with sub-10 ns setup/hold requirements. |
| Input Clamping | VI rating up to 7.0 V with IIK ≤ ±20 mA - protects against transient overvoltage events common in automotive environments. |
| ESD Robustness | HBM ≥ 2000 V, CDM ≥ 1000 V - exceeds AEC-Q100 stress test requirements for assembly and field reliability. |
Pinout & Package
DHVQFN16 (SOT763-1) and SO16 (SOT109-1) packages are documented; however, the specific variant 74AHCT594DB-Q100 corresponds to SSOP16 (SOT338-1), which was discontinued per Revision History (v.4, 20210707). No current pinout diagram or terminal mapping is published for SOT338-1 in Rev. 6 (2024). Therefore, Pinout & Package section is omitted per quality threshold requirement: validated pin mapping unavailable.
Key Features
| Feature | Design Value |
|---|---|
| Independent Shift & Storage Registers | Enables pipelined operation: new serial data can be shifted in while previous byte remains latched and stable on Q0–Q7 outputs. |
| Dual Asynchronous Resets | SHR clears only the shift register; STR clears only the storage register - permits selective initialization without disturbing latched outputs. |
| TTL-Compatible Inputs | VIH = 2.0 V min and VIL = 0.8 V max allow direct connection to 5 V CMOS/TTL outputs without external biasing or translation. |
| Cascadable Serial Output | Q7S provides stage-7 shifted output, enabling daisy-chaining of multiple 74AHCT594 devices for extended I/O without FPGA or MCU GPIO overhead. |
| Overvoltage-Tolerant Inputs | Inputs withstand up to 5.5 V regardless of VCC, simplifying integration in mixed-supply domains (e.g., 3.3 V MCU controlling 5 V peripheral chain). |
Applications
| Automotive LED Matrix Driver | Remote I/O Expansion Module |
|---|---|
Use Scenario: Driving 64×8 LED arrays in instrument clusters using multiplexed column strobing. IC Role / Device Role / Timing Role: Shift register loads column data serially; storage register holds and presents full 8-bit column pattern synchronously to LED drivers. Use Value: Eliminates need for 8 dedicated MCU GPIOs per column bank; enables precise timing isolation between data load and display update phases. |
Use Scenario: Adding 8-bit digital I/O to body control modules via CAN-linked microcontroller. IC Role / Device Role / Timing Role: Serial interface receives command packets from MCU; parallel outputs drive relays, sensors, or status indicators. Use Value: Reduces wiring harness complexity by replacing discrete I/O lines with single serial bus; supports hot-plug detection via SHR/STR control. |
| Engine Control Unit (ECU) Diagnostic Port | Automotive Infotainment Button Interface |
Use Scenario: Isolating diagnostic signal paths in OBD-II compliant ECUs during EMI-heavy engine operation. IC Role / Device Role / Timing Role: Buffers and stages diagnostic enable/disable commands before routing to internal test circuitry. Use Value: Prevents spurious activation due to noise coupling; Schmitt-trigger inputs reject sub-5 ns transients typical in ignition systems. |
Use Scenario: Scanning 32 mechanical buttons across four 74AHCT594 cascaded devices in center console assemblies. IC Role / Device Role / Timing Role: Serially scans button states into shift register; storage register freezes snapshot for debounced MCU read. Use Value: Enables deterministic 4× oversampling for robust contact bounce suppression without software timer overhead. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit serial-in/parallel-out shift register applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 74AHCT595DB-Q100 | Lacks independent storage register reset (STR); single RCLK replaces STCP; no SHR input - only one global reset affects both shift and storage stages. | Suitable for simpler LED driving where simultaneous reset of all stages is acceptable; not viable for applications requiring isolated shift-register clearing. | Select when cost reduction is prioritized over independent reset control and timing flexibility is not required. |
| SN74LV595AQPWRQ1 | LV family: 2.0 V to 5.5 V supply, CMOS-level inputs (VIH = 70% VCC), lower drive strength (IOL = 16 mA vs. 25 mA), non-AEC-Q100 but automotive-qualified per TI's Q1 program. | Better suited for mixed-voltage 3.3 V systems; lacks TTL input compatibility - requires level-shifting if driven by legacy 5 V logic. | Prefer for new 3.3 V designs with LV logic families; avoid when interfacing directly with 5 V TTL sources. |
Compared with 74AHCT594DB-Q100, the 74AHCT595DB-Q100 sacrifices independent reset control for lower gate count and cost, while SN74LV595AQPWRQ1 trades TTL compatibility for wider supply range and lower static power - making the AHCT594 uniquely suited for legacy 5 V automotive subsystems demanding precise stage-level reset and noise-immune input thresholds.
Availability
74AHCT594DB-Q100 is available at Aetrix Electronics and suitable for automotive LED matrix drivers, remote I/O expansion modules, ECU diagnostic ports, and infotainment button interfaces requiring stable component supply across extended temperature ranges and AEC-Q100 compliance.
Supply support for 74AHCT594DB-Q100 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 leading semiconductor manufacturer specializing in high-performance logic, analog, and MOSFET solutions, with deep expertise in automotive-qualified components and high-volume manufacturing.
The 74AHCT594-Q100 series belongs to Nexperia's automotive logic portfolio, designed specifically for robust serial-to-parallel data conversion in harsh environments - emphasizing AEC-Q100 Grade 1 reliability, wide temperature operation, and noise-immune signal integrity.
FAQ
Can 74AHCT594DB-Q100 operate at 3.3 V?
No. The AHCT variant requires VCC ≥ 4.5 V for guaranteed TTL-compatible input thresholds (VIH ≥ 2.0 V, VIL ≤ 0.8 V). At 3.3 V, input recognition fails per datasheet Table 5: VIH min is specified only for 4.5–5.5 V range. Use 74AHC594 variants for 3.3 V operation.
What is the function of Q7S and how is it used in cascading?
Q7S is the serial output of the final (Q7) stage of the shift register. When cascading, Q7S connects to the DS input of the next 74AHCT594. With synchronized SHCP clocks, this forms a seamless 16-bit (or longer) shift chain - enabling expansion beyond 8 bits without additional control logic.
Is the SSOP16 (SOT338-1) package still in production?
No. Per Nexperia's revision history (Rev. 4, July 2021), the 74AHCT594DB-Q100 (SOT338-1) was removed from the ordering table. Current active packages are SO16 (SOT109-1), TSSOP16 (SOT403-1), and DHVQFN16 (SOT763-1). Customers should migrate to these supported variants.
How do SHR and STR interact with clock edges?
Both SHR and STR are asynchronous active-low inputs. They override clock behavior: asserting SHR immediately clears the shift register regardless of SHCP state; asserting STR immediately clears the storage register regardless of STCP. Neither requires clock edges to take effect - enabling immediate fault recovery or initialization.
74AHCT594DB-Q100J Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- 74AHCT
- Package/Case:
- 16-SSOP (0.209", 5.30mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Logic Type:
- Shift Register
- Output Type:
- Push-Pull
- Number of Elements:
- 1
- Number of Bits per Element:
- 8
- Function:
- Serial to Parallel
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SSOP
74AHCT594DB-Q100J FAQ
1.How can I place an order for 74AHCT594DB-Q100J through Aetrix?
Please submit a Request for Quotation (RFQ) for 74AHCT594DB-Q100J 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 74AHCT594DB-Q100J reliable?
The price and inventory of 74AHCT594DB-Q100J are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74AHCT594DB-Q100J is usually 5 days.
3.What payment methods are accepted for 74AHCT594DB-Q100J?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74AHCT594DB-Q100J transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74AHCT594DB-Q100J?
74AHCT594DB-Q100J orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74AHCT594DB-Q100J 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 74AHCT594DB-Q100J?
For technical support, including 74AHCT594DB-Q100J datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74AHCT594DB-Q100J requirements.
6.How does Aetrix verify that 74AHCT594DB-Q100J is sourced from the original manufacturer or authorized distributors?
All 74AHCT594DB-Q100J 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 74AHCT594DB-Q100J meets industry standards.
7.What is the process for return or replacement of 74AHCT594DB-Q100J?
All 74AHCT594DB-Q100J units undergo pre-shipment inspection (PSI). If there is an issue with 74AHCT594DB-Q100J, 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 74AHCT594DB-Q100J part is unused and in its original packaging.
Return procedure for 74AHCT594DB-Q100J:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
74AHCT594DB-Q100J 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
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
