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Texas Instruments 74ACT16827DL
- Part No.:
- 74ACT16827DL
- Manufacturer:
- Texas Instruments
- Package:
- 56-BSSOP (0.295", 7.50mm Width)
- Datasheet:
-
74ACT16827DL.pdf
- Description:
- IC BUFF NON-INVERT 5.5V 56SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,986
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Product details
Overview
74ACT16827DL from Texas Instruments is a 20-bit noninverting buffer/driver IC with dual 10-bit sections, 3-state outputs, TTL-compatible inputs, and flow-through pin architecture in a 56-pin shrink small-outline package (SSOP-DL). It operates from –40°C to 85°C at 4.5–5.5 V, delivers ±24 mA output drive, and supports high-speed bus interfacing with tPLH/tPHL ≤ 11 ns.
For engineers reviewing the 74ACT16827DL datasheet, 74ACT16827DL pinout, 74ACT16827DL application, or 74ACT16827DL equivalent, key selection considerations include dual independent 3-state enable control (1OE1/1OE2, 2OE1/2OE2), distributed VCC/GND for noise suppression, EPIC™ 1-µm CMOS process, 500-mA latch-up immunity, and compatibility with legacy Widebus™ system designs.
Technical Context
The 74ACT16827DL implements two independent 10-bit noninverting buffer sections, each requiring both OE inputs low to activate outputs; either OE high forces that section into high-impedance state. Its flow-through architecture routes inputs on one side and outputs on the opposite side, minimizing trace crossovers and signal integrity degradation.
Distributed VCC and GND pins across the 56-pin DL package reduce simultaneous switching noise, while EPIC™ process ensures 500-mA latch-up immunity at 125°C and TTL-voltage compatibility (VIL = 0.8 V, VIH = 2 V) for mixed-logic interfacing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - Ensures stable operation across industrial-grade 5-V rails with margin for ripple and drop. |
| Output Drive | ±24 mA - Sufficient to directly drive terminated bus lines without external buffers in high-speed digital systems. |
| Propagation Delay | tPLH/tPHL ≤ 11 ns @ 5 V - Enables reliable timing in 20-MHz+ data paths with tight setup/hold margins. |
| Input Compatibility | TTL-level (VIL ≤ 0.8 V, VIH ≥ 2 V) - Allows direct connection to legacy 74LS/TTL logic without level-shifting circuitry. |
| 3-State Enable Logic | AND-gated dual OE per 10-bit section - Provides granular bus isolation: either OE high disables all 10 outputs of that section. |
| Power Dissipation | 1.4 W max @ TA = 55°C - Supports continuous operation in compact, convection-cooled PCB layouts. |
| Input Capacitance | Ci = 4.5 pF - Minimizes loading on upstream drivers and preserves signal edge rates in fanout-critical nodes. |
Pinout & Package
74ACT16827DL is housed in a 56-pin shrink small-outline package (SSOP-DL), 300-mil body width, 25-mil center-to-center pin pitch, with 7.87 mm tube width and 14.24 mm tube width per TI packaging data.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OE1, 1OE2, 2OE1, 2OE2 | Section Output Enable Inputs | AND logic per 10-bit section: both OE must be low for Y outputs to be active; any high forces high-Z state. |
| 1A1–1A10, 2A1–2A10 | Buffer Inputs | Noninverting data inputs for respective 10-bit sections; TTL-compatible voltage thresholds. |
| 1Y1–1Y10, 2Y1–2Y10 | Buffer Outputs | 3-state outputs capable of ±24 mA drive; high-Z when corresponding OE pair is not asserted. |
| VCC (Pins 7, 22, 36, 46) | Power Supply | Distributed VCC pins minimize IR drop and supply noise coupling across the 20-bit bus interface. |
| GND (Pins 4, 11, 18, 27, 33, 40, 49) | Ground Reference | Seven dedicated GND pins provide low-inductance return paths and suppress simultaneous switching noise. |
Key Features
| Feature | Design Value |
|---|---|
| Flow-through architecture | Input pins on left/right edges and outputs on opposite side - eliminates layer jumps and reduces PCB routing congestion in dense bus layouts. |
| Dual independent 3-state control | Two separate OE pairs per 10-bit section - enables selective isolation of subsystems on shared data buses without global disable. |
| EPIC™ 1-µm CMOS process | 500-mA latch-up immunity at 125°C - ensures robustness in industrial environments with transient overvoltage or ESD events. |
| Distributed VCC/GND | Four VCC and seven GND pins - lowers power delivery impedance and contains high-frequency noise within local supply domains. |
| Widebus™ family compatibility | Pinout and AC/DC specs aligned with TI's Widebus™ standard - simplifies migration from earlier 74ACT16224/16244 devices. |
Applications
| Backplane Data Bus Interface | Industrial PLC I/O Expansion Module |
|---|---|
Use Scenario: Interfacing microcontroller parallel ports to multi-slot backplane buses with termination and hot-swap requirements. IC Role / Device Role / Timing Role: Bidirectional 20-bit buffer isolating CPU address/data bus from backplane segments; 3-state control enables dynamic slot arbitration. Use Value: Dual OE logic allows per-slot enable/disable without affecting other modules; flow-through layout simplifies 4-layer backplane routing. |
Use Scenario: Extending digital I/O capacity in modular programmable logic controllers using standardized carrier boards. IC Role / Device Role / Timing Role: Level-shifting and bus-driving interface between FPGA-based controller and 24-V discrete I/O modules. Use Value: TTL-compatible inputs accept direct connection to legacy 74LS outputs; ±24 mA drive sustains signal integrity over 30-cm ribbon cables. |
| Test Equipment Digital Pattern Generator | Legacy System Memory Address Buffering |
Use Scenario: Generating synchronized 20-bit stimulus vectors for ASIC validation with precise timing and low skew. IC Role / Device Role / Timing Role: High-speed output driver stage translating pattern generator core outputs to DUT interface levels. Use Value: 11 ns max propagation delay and 4.5 pF input capacitance preserve sub-20-ns edge fidelity across full 20-bit width. |
Use Scenario: Isolating and buffering 20-bit address lines between CPU and multiple memory banks in retro-computing or avionics maintenance systems. IC Role / Device Role / Timing Role: Noninverting address latch/buffer with 3-state capability for memory bank selection and bus sharing. Use Value: Dual-section OE control permits independent enabling of upper/lower address banks during DMA cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 20-bit 3-state buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74ACT16244DGGR | 16-bit (not 20-bit); 44-pin TSSOP; identical AC/DC specs and OE architecture per 4-bit group. | Lacks two bits per section; requires two devices for 20-bit coverage; higher board area and interconnect complexity. | Select only if 16-bit granularity suffices and space constraints favor TSSOP over SSOP-DL. |
| 74ACT16224DL | 20-bit but inverting; same DL package, pinout, and timing; identical VCC/GND distribution and EPIC™ process. | Requires logic inversion in upstream design; unsuitable where signal polarity must be preserved end-to-end. | Choose only when inverting function aligns with system-level signal flow (e.g., complemented address decoding). |
Compared with SN74ACT16244DGGR and 74ACT16224DL, the 74ACT16827DL uniquely delivers noninverting 20-bit buffering in a single DL package with dual AND-gated OE control-enabling precise per-section bus isolation without polarity change or device count increase.
Availability
74ACT16827DL is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, test equipment digital pattern generation, and legacy system memory address buffering requiring stable component supply and long-term obsolescence management.
Supply support for 74ACT16827DL 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
Texas Instruments is a global semiconductor leader founded in 1930, specializing in analog, embedded processing, and logic solutions for industrial, automotive, and communications markets.
The 74ACT16827DL belongs to TI's Widebus™ family of high-speed CMOS bus-interface ICs, designed specifically for noise-resilient, high-density data-path buffering in backplane, instrumentation, and control-system applications.
FAQ
What is the operating temperature range for the 74ACT16827DL?
The 74ACT16827DL is characterized for operation from –40°C to +85°C, making it suitable for industrial environments where ambient temperatures exceed commercial-grade limits. This range is explicitly defined in the recommended operating conditions table of the SCAS163A datasheet, and distinguishes it from the military-grade 54ACT16827 variant rated for –55°C to 125°C.
How does the dual output-enable logic work on the 74ACT16827DL?
Each 10-bit section of the 74ACT16827DL uses AND-gated enable logic: for outputs 1Y1–1Y10 to be active, both 1OE1 and 1OE2 must be low; if either is high, all ten outputs go high-impedance. The same applies to 2OE1/2OE2 controlling 2Y1–2Y10. This design prevents partial enable states and ensures deterministic bus isolation.
Is the 74ACT16827DL pin-compatible with other Widebus™ 20-bit buffers?
No - the 74ACT16827DL has a unique 56-pin DL package pinout optimized for flow-through routing, differing from the 54-pin packages used by 74ACT16224DL and 74ACT16373DL. While functionally similar, its pin assignment (e.g., distributed VCC/GND, OE placement) is specific to the 74ACT16827DL and not interchangeable without PCB redesign.
What is the maximum output current rating for the 74ACT16827DL?
The 74ACT16827DL supports ±24 mA DC output current per pin under recommended operating conditions (VCC = 4.5–5.5 V, TA = –40°C to 85°C), verified in the electrical characteristics table. This rating enables direct driving of terminated 50-Ω transmission lines or multiple TTL loads without external amplification.
Does the 74ACT16827DL require external pull-up or pull-down resistors on unused inputs?
Yes - per Note 3 in the datasheet, all unused inputs on the 74ACT16827DL must be held static at VCC or GND to prevent floating states that could cause excessive ICC current, increased noise susceptibility, or undefined output behavior. Leaving inputs unconnected violates recommended operating conditions and risks functional instability.
74ACT16827DL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ACT
- Package/Case:
- 56-BSSOP (0.295", 7.50mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- Logic Type:
- Buffer, Non-Inverting
- Number of Elements:
- 2
- Number of Bits per Element:
- 10
- Input Type:
- -
- Output Type:
- 3-State
- Current - Output High, Low:
- 24mA, 24mA
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 56-SSOP
74ACT16827DL FAQ
1.How can I place an order for 74ACT16827DL through Aetrix?
Please submit a Request for Quotation (RFQ) for 74ACT16827DL 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 74ACT16827DL reliable?
The price and inventory of 74ACT16827DL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74ACT16827DL is usually 5 days.
3.What payment methods are accepted for 74ACT16827DL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74ACT16827DL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74ACT16827DL?
74ACT16827DL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74ACT16827DL 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 74ACT16827DL?
For technical support, including 74ACT16827DL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74ACT16827DL requirements.
6.How does Aetrix verify that 74ACT16827DL is sourced from the original manufacturer or authorized distributors?
All 74ACT16827DL 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 74ACT16827DL meets industry standards.
7.What is the process for return or replacement of 74ACT16827DL?
All 74ACT16827DL units undergo pre-shipment inspection (PSI). If there is an issue with 74ACT16827DL, 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 74ACT16827DL part is unused and in its original packaging.
Return procedure for 74ACT16827DL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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