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Diodes Incorporated 74AHCT595T16-13
- Part No.:
- 74AHCT595T16-13
- Manufacturer:
- Diodes Incorporated
- Category:
- Shift Registers
- Package:
- 16-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
74AHCT595T16-13.pdf
- Description:
- AHC HIGH PIN COUNT 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,490
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Product details
Overview
74AHCT595T16-13 from Diodes Incorporated is an 8-bit serial-in, parallel-out shift register with storage register and 3-state outputs, operating at 4.5–5.5 V, delivering 8 mA output drive, and featuring Schmitt-trigger inputs for noise immunity in microcontroller I/O expansion applications.
For engineers reviewing the 74AHCT595T16-13 datasheet, 74AHCT595T16-13 pinout, 74AHCT595T16-13 application, or 74AHCT595T16-13 equivalent, key selection criteria include propagation delay (≤10 ns), output enable timing (tEN/tDIS ≤14.5 ns), MR reset independence from clocks, and TSSOP-16 thermal performance in space-constrained PCBs.
Technical Context
The device implements two synchronized but independent registers: an 8-bit shift register clocked by SHCP (rising edge) and a storage register clocked by STCP (rising edge), enabling asynchronous data latching. Data flows serially via DS → Q7S → Q6S → … → Q0, with Q7S supporting daisy-chaining.
All inputs feature Schmitt-trigger action (VIH = 2.0 V min, VIL = 0.8 V max), ensuring robust noise rejection. Output enable (OE̅) controls high-impedance state on Q0–Q7 independently of register clocks, allowing bus sharing without data corruption.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - ensures compatibility with standard 5 V TTL/CMOS systems and stable operation across industrial temperature range. |
| Max Clock Frequency | 130 MHz (TA = +25°C) - supports high-speed serial data loading up to 130 million bits per second under nominal conditions. |
| Propagation Delay | tPD ≤ 10 ns (CL = 50 pF, VCC = 4.5–5.5 V) - enables tight timing margins in synchronous microcontroller interfaces with minimal skew. |
| Output Drive | ±8 mA at VCC = 4.5 V - sufficient to directly drive LEDs, small logic loads, or CMOS inputs without external buffers. |
| Input Hysteresis | Schmitt-trigger inputs (ΔV = ~1.2 V) - rejects noise spikes up to 1.2 V peak-to-peak on control lines like SHCP, STCP, and OE̅. |
| ESD Protection | HBM > 2000 V, CDM > 1000 V - meets IEC 61000-4-2 Level 3 requirements for handling robustness in assembly and field environments. |
Pinout & Package
TSSOP-16 package: 4.4 mm × 5.0 mm body, 0.65 mm pitch, 1.08 mm max height, optimized for automated placement and thermal dissipation in dense layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 5, 6, 7, 15 | Q0–Q7 Parallel Outputs | Active-high 3-state outputs; driven only when OE̅ = LOW and STCP has latched valid data. |
| 8 | GND | Ground reference for all internal logic and output drivers; must be low-impedance connection to minimize switching noise. |
| 9 | Q7S Serial Output | Shift register MSB output; enables cascading multiple 74AHCT595 devices for >8-bit wide data paths. |
| 10 | MR Master Reset | Asynchronous active-low reset; clears shift register to zero regardless of clock states - critical for known-power-on state. |
| 11 | SHCP Shift Clock | Rising-edge triggered; advances serial data one bit into shift register - must meet tW ≥ 5 ns pulse width. |
| 12 | STCP Storage Clock | Rising-edge triggered; copies current shift register contents to output register - decouples serial load from parallel output update. |
| 13 | OE̅ Output Enable | Active-low 3-state control; disables Q0–Q7 outputs (high-Z) without affecting internal register states. |
| 14 | DS Serial Input | Data input sampled on SHCP rising edge; requires tSU ≥ 3 ns setup and tH ≥ 2 ns hold relative to SHCP. |
| 16 | VCC | Positive supply; must be bypassed with ≥100 nF ceramic capacitor near pin to suppress switching transients. |
Key Features
| Feature | Design Value |
|---|---|
| Independent shift & storage registers | Enables continuous serial data loading while holding previous parallel output stable - eliminates output glitches during update. |
| Schmitt-trigger inputs | Guarantees clean clock and control edge detection even with slow-rising or noisy signals from microcontrollers or mechanical switches. |
| Asynchronous master reset (MR) | Ensures deterministic initial state on power-up or fault recovery without requiring clock synchronization. |
| 3-state parallel outputs with OE̅ | Allows direct connection to shared buses (e.g., LED matrix rows, GPIO expanders) without external multiplexing logic. |
| Wide temperature operation | -40°C to +125°C operating range supports deployment in automotive engine compartments and industrial PLC modules. |
Applications
| LED Matrix Control | Microcontroller GPIO Expansion |
|---|---|
|
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 presents it as simultaneous 8-bit parallel outputs synchronized to STCP. Use Value: Reduces microcontroller pin count from 8+2 to 3 (DS, SHCP, STCP) while maintaining flicker-free display refresh via independent latch timing. |
Use Scenario: Adding 8 programmable digital outputs to an ARM Cortex-M0-based sensor node with only 2 spare GPIOs. IC Role / Device Role / Timing Role: I/O expander with buffered outputs; MR ensures known-zero startup state before firmware initialization. Use Value: Enables reliable peripheral control (relays, indicators, sensors) without sacrificing MCU resources or requiring external pull-ups. |
| Daisy-Chained Peripheral Interface | Industrial Status Register |
|
Use Scenario: Cascading four 74AHCT595 devices to manage 32 discrete outputs across a modular PLC backplane. IC Role / Device Role / Timing Role: First-stage shift register feeds Q7S to next device's DS; all share common SHCP/STCP/OE̅ for synchronized update. Use Value: Achieves scalable I/O expansion with single SPI interface and deterministic 32-bit update latency (4 × tPD + tSU). |
Use Scenario: Capturing and holding alarm status bits from 8 field sensors in a factory automation cabinet for periodic polling. IC Role / Device Role / Timing Role: Storage register holds last-read sensor states; STCP updates only when new data is validated. Use Value: Prevents read-miss errors during rapid sensor transitions by decoupling acquisition (SHCP) from reporting (STCP). |
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 |
|---|---|---|---|
| SN74HC595PWR | Higher VIH (3.15 V min), lower ICC (≤4 μA), no Schmitt inputs - less noise-immune on long traces. | Preferred in battery-powered systems where ultra-low quiescent current dominates over noise margin. | Select SN74HC595PWR only if board layout ensures clean, short control lines and supply is strictly 5 V ±5%. |
| 74LV595PW,118 | 3.3 V only (1.0–3.6 V), lower VOH/VOL, smaller tPD (≤7 ns), TSSOP-16 footprint identical. | Required for mixed-voltage 3.3 V systems interfacing to 5 V peripherals via level shifters. | Choose 74LV595PW,118 when main system runs at 3.3 V and full 5 V tolerance is unnecessary. |
Compared with SN74HC595PWR and 74LV595PW,118, the 74AHCT595T16-13 uniquely combines 5 V TTL-compatible thresholds, Schmitt-trigger noise immunity, and industrial temperature support - making it optimal for legacy 5 V microcontroller designs in electrically noisy environments.
Availability
74AHCT595T16-13 is available at Aetrix Electronics and suitable for LED display drivers, microcontroller I/O expansion, daisy-chained industrial controllers, and real-time status register applications requiring stable component supply across extended product lifecycles.
Supply support for 74AHCT595T16-13 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 components for industrial, computing, and consumer markets with ISO/TS 16949-certified production.
The 74AHCT595 belongs to Diodes' advanced high-speed CMOS logic family, designed specifically to replace legacy 74LS devices while delivering lower power, higher noise immunity, and guaranteed 5 V operation in modern embedded control systems.
FAQ
Can the 74AHCT595T16-13 operate reliably at 3.3 V?
No. The 74AHCT595T16-13 requires a minimum supply voltage of 4.5 V per its Recommended Operating Conditions. At 3.3 V, VIH and VOL specifications are not guaranteed, and output drive falls below 1 mA - insufficient for most logic interfaces. Use 74LV595 for 3.3 V systems.
What happens to Q0–Q7 outputs during MR assertion?
When MR is pulled LOW, the internal shift register resets to all zeros, but the storage register and Q0–Q7 outputs remain unchanged until the next STCP rising edge. Only after STCP triggers does the cleared shift register content (all zeros) propagate to outputs - preserving prior state during reset.
Is Q7S output registered or combinatorial?
Q7S is the true serial output of the shift register's most significant stage and is registered - it changes only on the rising edge of SHCP, synchronized with internal shift action. Its timing is specified in tPD (SHCP to Q7S) as ≤10 ns, confirming registered behavior.
Does OE̅ affect Q7S or only Q0–Q7?
OE̅ affects only Q0–Q7 outputs. Q7S remains fully functional and active regardless of OE̅ state - enabling uninterrupted daisy-chaining even when parallel outputs are disabled. This is confirmed in the Functional Description table where Q7S = NC (no change) when OE̅ = HIGH.
74AHCT595T16-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- 74AHCT
- Package/Case:
- 16-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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-TSSOP
74AHCT595T16-13 FAQ
1.How can I place an order for 74AHCT595T16-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74AHCT595T16-13 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 74AHCT595T16-13 reliable?
The price and inventory of 74AHCT595T16-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74AHCT595T16-13 is usually 5 days.
3.What payment methods are accepted for 74AHCT595T16-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74AHCT595T16-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74AHCT595T16-13?
74AHCT595T16-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74AHCT595T16-13 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 74AHCT595T16-13?
For technical support, including 74AHCT595T16-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74AHCT595T16-13 requirements.
6.How does Aetrix verify that 74AHCT595T16-13 is sourced from the original manufacturer or authorized distributors?
All 74AHCT595T16-13 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 74AHCT595T16-13 meets industry standards.
7.What is the process for return or replacement of 74AHCT595T16-13?
All 74AHCT595T16-13 units undergo pre-shipment inspection (PSI). If there is an issue with 74AHCT595T16-13, 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 74AHCT595T16-13 part is unused and in its original packaging.
Return procedure for 74AHCT595T16-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
74AHCT595T16-13 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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