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Diodes Incorporated 74AHCT594S16-13
- Part No.:
- 74AHCT594S16-13
- Manufacturer:
- Diodes Incorporated
- Category:
- Shift Registers
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
74AHCT594S16-13.pdf
- Description:
- AHC HIGH PIN COUNT SO-16
- Quantity:
- Payment:
- Shipping:
Inventory:2,429
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Product details
Overview
74AHCT594S16-13 from Diodes Incorporated is an 8-bit serial-in, parallel-out shift register with separate 8-bit storage register and active-low asynchronous reset for both registers, operating at 4.5–5.5 V, delivering 8 mA output drive, and featuring Schmitt-trigger inputs for noise immunity in industrial microcontroller I/O expansion applications.
For engineers reviewing the 74AHCT594S16-13 datasheet, 74AHCT594S16-13 pinout, 74AHCT594S16-13 application, or 74AHCT594S16-13 equivalent, key selection criteria include dual-register timing independence, Q7S cascading capability, simultaneous parallel output assertion on STCP edge, and SO-16 package compatibility with legacy 74LS594 layouts.
Technical Context
The device implements two synchronized but independent 8-bit registers: a shift register clocked by SHCP (data loaded on rising edge) and a storage register clocked by STCP (data latched on rising edge), enabling pipeline delay control between serial input and parallel output stages. Both SHR and STR are active-low asynchronous resets, fully decoupled from clock edges.
Q7S provides serial output from the shift register's most significant stage for daisy-chaining multiple devices; all eight parallel outputs (Q0–Q7) are push-pull, capable of sourcing/sinking 8 mA at VCC = 4.5 V, with input thresholds meeting TTL-compatible levels and Schmitt-trigger hysteresis for robust signal integrity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - ensures compatibility with standard 5 V logic systems and tolerance against rail droop. |
| Output Drive | ±8 mA at VCC = 4.5 V - sufficient to directly drive LEDs or interface with standard CMOS/TTL loads without external buffers. |
| Max Clock Frequency | 90 MHz (SHCP/STCP) - supports high-speed serial data ingestion and parallel update in real-time control loops. |
| Input Hysteresis | Schmitt-trigger action - rejects up to ~0.8 V of input noise, critical for noisy industrial bus environments. |
| Propagation Delay | tPLH(STCP→Qn) = 3.7 ns (typ) - enables sub-10 ns deterministic output update latency after storage clock edge. |
| ESD Protection | 2 kV HBM, 1 kV CDM - exceeds JEDEC standards for handling safety in automated assembly and field service. |
| Operating Temp | −40 °C to +125 °C - qualified for under-hood automotive and industrial ambient conditions. |
Pinout & Package
74AHCT594S16-13 is housed in a 16-pin SOIC (SO-16) package with standard 1.27 mm pitch, 10.0 mm × 4.0 mm body, and gull-wing leads suitable for reflow soldering per IPC-J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 5, 6, 7, 15 | Q0–Q7 Parallel Outputs | Push-pull CMOS outputs; assert latched data simultaneously on STCP rising edge for glitch-free parallel bus driving. |
| 9 | Q7S Serial Output | Shift register MSB output; enables cascading to next 74AHCT594 for >8-bit wide data expansion. |
| 10 | SHR Shift Reset | Asynchronous active-low reset of shift register only; independent of SHCP/STCP, used for serial stream synchronization. |
| 11 | SHCP Shift Clock | Rising-edge triggered; advances serial data (DS) into shift register, one bit per pulse. |
| 12 | STCP Storage Clock | Rising-edge triggered; transfers full 8-bit content from shift register to output register (Q0–Q7). |
| 13 | STR Storage Reset | Asynchronous active-low reset of storage register only; clears Q0–Q7 independently of STCP timing. |
| 14 | DS Serial Input | Data input for shift register; sampled on SHCP rising edge with setup/hold times validated down to −40 °C. |
| 8, 16 | GND / VCC | Dual power pins ensure low-impedance supply return path and reduce switching noise coupling across 8 outputs. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent registers | Enables pipelined operation: new serial data can be shifted in while previous byte remains held and driven on Q0–Q7. |
| Asynchronous active-low resets | SHR and STR allow immediate register clearing without waiting for clock edges-critical for fault recovery and initialization. |
| Q7S cascading output | Eliminates need for external logic to chain devices; supports scalable I/O expansion using single DS line and shared clocks. |
| TTL-compatible input thresholds | VIH = 2.0 V min, VIL = 0.8 V max - ensures reliable interfacing with legacy 5 V microcontrollers and logic families. |
| Low ICC current | 4.0 μA typical supply current at 5.5 V - reduces system-level power budget impact in always-on control modules. |
Applications
| LED Matrix Controller | Industrial PLC I/O Expander |
|---|---|
Use Scenario: Driving 8×8 monochrome LED display from an MCU with limited GPIOs via SPI-like serial interface. IC Role / Device Role / Timing Role: Serial-to-parallel converter that accepts bitstream from MCU and asserts stable column/row drive signals on Q0–Q7. Use Value: Eliminates need for dedicated LED driver ICs; Q7S allows vertical stacking of displays without added glue logic. |
Use Scenario: Adding isolated digital output points to a programmable logic controller rack with space-constrained PCB layout. IC Role / Device Role / Timing Role: Output latch stage buffering PLC CPU commands before driving relay coils or optocouplers. Use Value: STR reset ensures safe power-up state (all outputs low); ±8 mA drive directly interfaces with 5 V opto-LEDs. |
| Appliance Control Panel | Test Equipment Signal Generator |
Use Scenario: Managing front-panel indicator LEDs and button status feedback in washing machine or HVAC control board. IC Role / Device Role / Timing Role: Captures serial scan codes from keypad matrix and holds steady output states for panel illumination. Use Value: Schmitt-trigger inputs reject EMI from motor drivers; −40 °C to +125 °C rating covers enclosure thermal extremes. |
Use Scenario: Generating precise multi-bit test patterns (e.g., PRBS, walking 1s) for digital circuit validation benches. IC Role / Device Role / Timing Role: High-speed pattern shifter feeding parallel bus to DUT; STCP edge defines deterministic pattern launch time. Use Value: 90 MHz max clock enables >100 Mbps serial pattern rates; tPLH < 4 ns ensures sub-10 ns jitter in pattern edge alignment. |
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 |
|---|---|---|---|
| SN74AHCT595N | Lacks separate storage register reset (STR); shares single active-low SRCLR for both shift and storage registers. | Less flexible for applications requiring independent reset of output latches during ongoing shift operations. | Choose when cost sensitivity outweighs need for dual-reset isolation and Q7S is not required. |
| 74LV595PW | Lower voltage range (1.65–5.5 V); no Schmitt-trigger inputs; 6 mA output drive at 3.3 V. | Optimized for mixed-voltage 3.3 V systems; unsuitable for noisy 5 V industrial environments due to missing hysteresis. | Prefer for battery-powered or low-power embedded designs where 5 V noise immunity is not required. |
Compared with SN74AHCT595N and 74LV595PW, the 74AHCT594S16-13 uniquely supports independent asynchronous reset of shift and storage registers, delivers higher noise-immune input thresholds, and provides guaranteed 8 mA drive at 5 V-making it optimal for deterministic, robust I/O expansion in harsh 5 V systems.
Availability
74AHCT594S16-13 is available at Aetrix Electronics and suitable for industrial PLC modules, appliance control panels, LED signage controllers, and test equipment requiring stable component supply with long-term manufacturability assurance.
Supply support for 74AHCT594S16-13 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
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability, industry-qualified components for automotive, industrial, and computing markets.
The 74AHCT594 belongs to Diodes' advanced high-speed CMOS logic family, engineered for pin compatibility with legacy 74LS devices while delivering lower power, higher noise immunity, and extended temperature operation.
FAQ
Can 74AHCT594S16-13 operate reliably at 3.3 V?
No. The 74AHCT594S16-13 is specified only for 4.5–5.5 V operation. Its VIH minimum is 2.0 V, but internal gate thresholds and output drive strength are optimized for 5 V rails; operation below 4.5 V risks timing violations, reduced noise margin, and failure to meet output voltage specifications per datasheet Table 5.
What is the functional difference between SHR and STR pins?
SHR (pin 10) asynchronously resets only the 8-bit shift register, clearing DS-shifted bits but leaving Q0–Q7 unchanged. STR (pin 13) asynchronously resets only the 8-bit storage register, forcing Q0–Q7 low while preserving shift register contents. This separation enables independent control of serial ingestion and parallel output states.
Is Q7S output synchronous or asynchronous with respect to STCP?
Q7S is strictly synchronous with SHCP: it reflects the shift register's Q7 state immediately after each SHCP rising edge and is unaffected by STCP. It does not mirror Q7 output changes caused by STCP-those appear only on Q7, not Q7S-enabling clean daisy-chain propagation without storage register interference.
Does the SO-16 package of 74AHCT594S16-13 match footprint of 74LS595N?
Yes. The SO-16 (S16) package has identical 1.27 mm pitch, 10.0 mm × 4.0 mm body dimensions, and pin 1 location as standard 74LS595N SOIC packages. Pin mapping differs (e.g., 74AHCT594 uses pin 13 for STR vs. 74LS595's OE), so PCB layout must verify signal routing-but mechanical replacement is feasible with firmware/logic adaptation.
74AHCT594S16-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- 74AHCT
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Logic Type:
- Shift Register
- Output Type:
- Push-Pull
- 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-SO
74AHCT594S16-13 FAQ
1.How can I place an order for 74AHCT594S16-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74AHCT594S16-13 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 74AHCT594S16-13 reliable?
The price and inventory of 74AHCT594S16-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74AHCT594S16-13 is usually 5 days.
3.What payment methods are accepted for 74AHCT594S16-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74AHCT594S16-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74AHCT594S16-13?
74AHCT594S16-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74AHCT594S16-13 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 74AHCT594S16-13?
For technical support, including 74AHCT594S16-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74AHCT594S16-13 requirements.
6.How does Aetrix verify that 74AHCT594S16-13 is sourced from the original manufacturer or authorized distributors?
All 74AHCT594S16-13 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 74AHCT594S16-13 meets industry standards.
7.What is the process for return or replacement of 74AHCT594S16-13?
All 74AHCT594S16-13 units undergo pre-shipment inspection (PSI). If there is an issue with 74AHCT594S16-13, 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 74AHCT594S16-13 part is unused and in its original packaging.
Return procedure for 74AHCT594S16-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
74AHCT594S16-13 Tags
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SN74HC595DR
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74HC595PW,118
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SN74HC595PWR
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74HC165D,653
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SN74LV165APWR
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74HC595BQ,115
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74HC165BQ,115
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CD4094BPWR
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