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Texas Instruments SN74ALVTH16827GR
- Part No.:
- SN74ALVTH16827GR
- Manufacturer:
- Texas Instruments
- Package:
- 56-TFSOP (0.240", 6.10mm Width)
- Datasheet:
-
SN74ALVTH16827GR.pdf
- Description:
- IC BUF NON-INVERT 3.6V 56TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,554
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Product details
Overview
SN74ALVTH16827GR from Texas Instruments is a 20-bit noninverting buffer/driver with 3-state outputs, designed for 2.5-V/3.3-V operation and mixed-mode (5-V input-tolerant) interfacing. It delivers ±32/64 mA drive at 3.3 V, features bus-hold on all data inputs, auto-3-state detection, and power-off high-impedance outputs-enabling reliable backplane and memory interface buffering in industrial control systems.
For engineers reviewing the SN74ALVTH16827GR datasheet, SN74ALVTH16827GR pinout, SN74ALVTH16827GR application, or SN74ALVTH16827GR equivalent, key selection criteria include its dual 10-bit sections with independent OE control, flow-through pinout for PCB layout optimization, TTL-compatible 5-V input tolerance, and guaranteed high-impedance state during power-up/down below 1.2 V.
Technical Context
The SN74ALVTH16827GR implements an Advanced BiCMOS Technology (ABT) Widebus™ architecture with distributed VCC/GND pins to suppress high-speed switching noise. Its two independent 10-bit sections each use two active-low output-enable inputs (e.g., 1OE1 and 1OE2), requiring both to be low for Y outputs to drive; either high forces that section into high-Z.
Bus-hold circuitry eliminates external pullup/pulldown resistors by actively sustaining logic levels on floating inputs, while auto-3-state disables outputs when VO exceeds VCC + 0.5 V-preventing bus contention during hot-swap or level-shifting transitions. The device supports live insertion via power-off output disable and maintains high-Z during VCC ramping at ≥200 µs/V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2.3 V to 3.6 V - supports dual-voltage system interfacing without level shifters |
| Output Drive (3.3 V) | –32 mA / +64 mA - drives heavy capacitive loads and multiple TTL inputs directly |
| Input Voltage Tolerance | 0 V to 5.5 V - accepts 5-V signals while powered from 2.5 V or 3.3 V |
| Propagation Delay (3.3 V) | 1.6 ns to 2.8 ns - enables sub-350-MHz data rates in point-to-point or stub-bus topologies |
| Bus-Hold Current | ±75 µA at VIL/VIH - sustains valid logic states without external biasing components |
| Power-Up High-Z Threshold | VCC ≤ 1.2 V - prevents output conflict during brown-out or controlled power sequencing |
| ESD Rating | 2000 V HBM, 1000 V CDM - meets industrial I/O robustness requirements per MIL-STD-883 |
Pinout & Package
SN74ALVTH16827GR is packaged in a 56-pin Thin Very Small-Outline Package (TVSOP, DGV), 7.7 mm × 11.2 mm footprint, 1.2 mm max height, JEDEC MO-194 compliant. Pin spacing is 0.4 mm; thermal resistance θJA = 86°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OE1, 1OE2, 2OE1, 2OE2 | Active-low output-enable control | Both OE inputs per 10-bit section must be low to enable outputs; either high forces high-impedance state |
| 1A1–1A10, 2A1–2A10 | Data inputs | Feature integrated bus-hold; tolerate 5-V inputs regardless of VCC |
| 1Y1–1Y10, 2Y1–2Y10 | Buffered outputs | 3-state, high-drive, auto-3-state enabled when VO > VCC + 0.5 V |
| VCC (Pins 7, 20, 36, 49) | Supply voltage | Distributed power pins minimize simultaneous switching noise across 20-bit bus |
| GND (Pins 4, 11, 17, 23, 33, 40, 46, 53) | Ground reference | Eight GND pins provide low-inductance return paths for high-speed switching currents |
Key Features
| Feature | Design Value |
|---|---|
| Flow-through pinout | Input and output pins arranged on opposite sides (e.g., A1–A10 left, Y1–Y10 right) simplifies layer routing and reduces crosstalk in dense PCB layouts |
| Mixed-mode signal operation | 5-V-tolerant inputs with 2.3–3.6-V VCC allow direct connection to legacy 5-V logic without external translators |
| Auto-3-state | Outputs automatically enter high-Z when VO exceeds VCC + 0.5 V - prevents bus contention during hot-plug or voltage rail mismatch |
| Power-off output disable | Outputs remain high-impedance when VCC = 0 V - enables safe live insertion into powered backplanes |
| Low ground bounce (VOLP) | < 0.8 V at VCC = 3.3 V - ensures clean logic-low transitions under full load, critical for noise-sensitive receivers |
Applications
| Industrial Backplane Interface | Memory Subsystem Buffering |
|---|---|
|
Use Scenario: Interfacing 3.3-V FPGA I/O banks to legacy 5-V peripheral cards in programmable logic controllers. IC Role / Device Role / Timing Role: Bidirectional 20-bit buffer providing level translation, bus isolation, and drive strength amplification between voltage domains. Use Value: Eliminates discrete level shifters and pull-up networks while maintaining signal integrity at 100+ MHz clock rates due to matched propagation delays and low ground bounce. |
Use Scenario: Driving address/data lines from a 3.3-V microcontroller to multiple SRAM or Flash devices sharing a common bus. IC Role / Device Role / Timing Role: Noninverting 3-state driver enabling time-multiplexed access and preventing bus contention during chip select transitions. Use Value: Bus-hold inputs prevent floating states during deselect, and ±64 mA drive ensures fast edge rates into 50-pF loads typical of multi-device memory buses. |
| Hot-Swappable Module Interface | Automated Test Equipment (ATE) Signal Conditioning |
|
Use Scenario: Enabling field-replaceable modules in telecom line cards where boards are inserted into live backplanes. IC Role / Device Role / Timing Role: Isolation buffer ensuring no current flows into module I/O during insertion until VCC stabilizes above 1.2 V. Use Value: Power-up high-Z guarantee and live-insertion support eliminate need for complex power-sequencing circuitry or mechanical interlocks. |
Use Scenario: Conditioning digital stimulus and response signals between ATE controller and DUT with precise timing and noise immunity. IC Role / Device Role / Timing Role: Low-skew, high-drive buffer isolating tester logic from DUT capacitance and ESD events. Use Value: 1.6 ns min tPHL and 2.8 ns max tPHL at 3.3 V enable sub-350-MHz pattern rates; 2000-V HBM rating protects tester instrumentation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 20-bit buffer/driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74ALVCH16827GR | No bus-hold; requires external pullups/pulldowns on unused inputs; lower drive (–24/+24 mA @ 3.3 V) | Suitable only when board-level biasing is already implemented and drive demand is reduced | Select if cost sensitivity outweighs design simplicity and bus-hold reliability |
| SN74LVC16245ADGGR | Non-5-V-tolerant inputs (max VI = VCC + 0.3 V); no auto-3-state; higher ICC (6 mA typical @ 3.3 V) | Requires external level shifting for 5-V interfaces; lacks live-insertion capability | Choose only for pure 3.3-V systems where 5-V tolerance and power-off high-Z are unnecessary |
Compared with SN74ALVCH16827GR and SN74LVC16245ADGGR, the SN74ALVTH16827GR uniquely combines 5-V input tolerance, integrated bus-hold, auto-3-state, and power-off high-Z-making it the sole option for robust, self-contained 20-bit interfacing in mixed-voltage, hot-swap, or floating-bus environments.
Availability
SN74ALVTH16827GR is available at Aetrix Electronics and suitable for industrial backplane interfaces, memory subsystem buffering, hot-swappable module designs, and automated test equipment signal conditioning requiring stable component supply and long-term obsolescence management.
Supply support for SN74ALVTH16827GR 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 specializing in analog, embedded processing, and logic solutions, with over 50 years of innovation in high-reliability interface ICs.
The SN74ALVTH16827GR belongs to TI's ALVTH Widebus™ family-designed specifically for high-speed, mixed-voltage bus interfacing in industrial, telecom, and computing infrastructure where signal integrity, power sequencing resilience, and layout efficiency are critical.
FAQ
What is the operating temperature range for the SN74ALVTH16827GR?
The SN74ALVTH16827GR is characterized for operation from –40°C to +85°C, meeting industrial-grade environmental requirements. This range is validated per the recommended operating conditions in the official Texas Instruments datasheet SCES076E, with performance specifications guaranteed across the full span including propagation delay, drive strength, and bus-hold functionality.
Does the SN74ALVTH16827GR support 5-V input signals while powered at 2.5 V?
Yes, the SN74ALVTH16827GR supports input voltages up to 5.5 V regardless of VCC level (2.3 V to 3.6 V). This 5-V tolerance is explicitly specified in the "Recommended Operating Conditions" table for VI, allowing direct interfacing with legacy 5-V logic without external level shifters-confirmed in both 2.5-V and 3.3-V operating condition tables of the SCES076E datasheet.
How does the bus-hold feature work on the SN74ALVTH16827GR?
The SN74ALVTH16827GR integrates active bus-hold circuitry on all data inputs (1A1–1A10, 2A1–2A10), sinking or sourcing ±75 µA at VIL/VIH thresholds to maintain valid logic states on floating or unterminated lines. This eliminates the need for external pullup/pulldown resistors, reducing BOM count and PCB area-verified in the electrical characteristics tables for IBHL and IBHH under 3.3-V operation.
What happens to the outputs of the SN74ALVTH16827GR during power-up or power-down?
When VCC is ≤ 1.2 V, the SN74ALVTH16827GR guarantees high-impedance outputs regardless of OE state-preventing bus conflicts during brown-out or uncontrolled power sequencing. Above 1.2 V, OE must be actively controlled; tying OE to VCC via a pullup resistor ensures safe startup, as detailed in the "description (continued)" section of SCES076E.
Is the SN74ALVTH16827GR pin-compatible with other 20-bit ALVTH buffers?
Yes, the SN74ALVTH16827GR shares identical pinout and functional behavior with the SN74ALVTH16827DL (SSOP) and SN74ALVTH16827VR (TVSOP) variants-confirmed by the "SN74ALVTH16827 . . . DGG, DGV, OR DL PACKAGE" note and matching pin diagrams in SCES076E. All variants use the same 56-pin flow-through arrangement and dual-OE architecture.
SN74ALVTH16827GR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ALVTH
- Package/Case:
- 56-TFSOP (0.240", 6.10mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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:
- 8mA, 24mA; 32mA, 64mA
- Voltage - Supply:
- 2.3V ~ 2.7V, 3V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 56-TSSOP
SN74ALVTH16827GR FAQ
1.How can I place an order for SN74ALVTH16827GR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74ALVTH16827GR 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 SN74ALVTH16827GR reliable?
The price and inventory of SN74ALVTH16827GR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ALVTH16827GR is usually 5 days.
3.What payment methods are accepted for SN74ALVTH16827GR?
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4.How is shipping managed for SN74ALVTH16827GR?
SN74ALVTH16827GR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74ALVTH16827GR 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 SN74ALVTH16827GR?
For technical support, including SN74ALVTH16827GR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ALVTH16827GR requirements.
6.How does Aetrix verify that SN74ALVTH16827GR is sourced from the original manufacturer or authorized distributors?
All SN74ALVTH16827GR 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 SN74ALVTH16827GR meets industry standards.
7.What is the process for return or replacement of SN74ALVTH16827GR?
All SN74ALVTH16827GR units undergo pre-shipment inspection (PSI). If there is an issue with SN74ALVTH16827GR, 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 SN74ALVTH16827GR part is unused and in its original packaging.
Return procedure for SN74ALVTH16827GR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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