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Texas Instruments SN74ALVTH162827GR
- Part No.:
- SN74ALVTH162827GR
- Manufacturer:
- Texas Instruments
- Package:
- 56-TFSOP (0.240", 6.10mm Width)
- Datasheet:
-
SN74ALVTH162827GR.pdf
- Description:
- IC BUF NON-INVERT 3.6V 56TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,174
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Product details
Overview
SN74ALVTH162827GR from Texas Instruments is a 20-bit noninverting buffer/driver with 3-state outputs, designed for 2.5-V/3.3-V VCC operation and TTL-level 5-V signal interfacing. It features bus-hold circuitry on all data inputs, integrated 30-Ω output series resistors, and auto 3-state functionality that disables outputs when Y exceeds VCC + 0.5 V - enabling robust mixed-voltage backplane or memory interface buffering.
For engineers reviewing the SN74ALVTH162827GR datasheet, SN74ALVTH162827GR pinout, SN74ALVTH162827GR application, or SN74ALVTH162827GR equivalent, key selection criteria include its dual 10-bit section architecture with independent OE control, power-off high-impedance state, ground-bounce performance (<0.8 V at 3.3 V), and TSSOP-56 (DGG) package compatibility with high-density PCB layouts.
Technical Context
This device implements Advanced BiCMOS Technology (ABT) Widebus™ architecture to support simultaneous 2.5-V and 3.3-V supply operation while accepting 5-V-tolerant inputs. Its two independent 10-bit sections each require both OE1 and OE2 low to enable outputs - providing granular bus control without external logic.
The integrated bus-hold circuitry eliminates need for external pullup/pulldown resistors on unused inputs, and distributed VCC/GND pinning plus flow-through pinout minimizes switching noise and simplifies routing in high-speed parallel interfaces such as address/data buses in industrial controllers or FPGA I/O expansion.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2.3 V to 3.6 V - supports stable operation across both 2.5-V and 3.3-V system rails without level shifters. |
| IOL/IOH | 12 mA sink / –12 mA source - drives standard TTL loads directly; sufficient for fanout-10 in 3.3-V systems. |
| tPLH/tPHL | 1.0 ns to 3.9 ns (VCC = 3.3 V, CL = 50 pF) - enables sub-4 ns propagation in high-speed data paths like memory buffers. |
| Bus-Hold Current | ±75 µA (VCC = 3 V) - actively holds floating inputs at valid logic levels, preventing metastability in unterminated buses. |
| Output Series Resistor | 30 Ω (integrated) - suppresses overshoot/undershoot without discrete termination, reducing BOM count and layout area. |
| Power-Up Behavior | High-impedance state when VCC ≤ 1.2 V - prevents bus contention during power sequencing in hot-swap or multi-rail systems. |
| VO Tolerance | –0.5 V to 7 V on inputs/outputs - allows safe interfacing with 5-V legacy peripherals without external clamping. |
Pinout & Package
TSSOP-56 (DGG) package: 13.9 mm × 6.0 mm × 1.2 mm max height, 0.5-mm pitch, JEDEC MO-153 compliant. Pin 1 index located at top-left corner with beveled edge marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OE1, 1OE2, 2OE1, 2OE2 | Section Output Enable (active-low) | Both OE signals per 10-bit section must be low to activate corresponding Y outputs; enables independent control of two 10-bit channels. |
| 1A1–1A10, 2A1–2A10 | Data Inputs | Feature bus-hold circuitry - maintains valid logic state when un-driven; eliminates need for external biasing resistors. |
| 1Y1–1Y10, 2Y1–2Y10 | 3-State Buffered Outputs | Include internal 30-Ω series resistance; auto 3-state triggers when output voltage exceeds VCC + 0.5 V. |
| VCC, GND | Power Supply | Distributed across package (10× VCC, 10× GND pins) - reduces simultaneous switching noise and improves PDN integrity. |
Key Features
| Feature | Design Value |
|---|---|
| Mixed-mode signal operation | Accepts 5-V inputs while operating from 2.3–3.6-V VCC - enables direct interfacing between 3.3-V FPGAs and 5-V legacy peripherals. |
| Auto 3-state protection | Outputs automatically enter high-Z when Y > VCC + 0.5 V - prevents latch-up and overvoltage damage during hot-plug or bus contention events. |
| Live insertion support | Outputs disabled during power-off (IOFF ±100 µA) - allows safe board replacement in powered-backplane systems without disrupting bus operation. |
| Flow-through pinout | Input pins on one side, outputs on opposite side - enables straight-through PCB trace routing, minimizing stubs and crosstalk in parallel buses. |
| Low ground bounce | VOLP < 0.8 V at VCC = 3.3 V - ensures clean logic thresholds under heavy capacitive loading, critical for reliable memory or address bus timing. |
Applications
| Industrial PLC Backplane Interface | FPGA I/O Expansion Buffer |
|---|---|
|
Use Scenario: Interfacing 3.3-V FPGA I/O banks to legacy 5-V industrial I/O modules via parallel address/data bus. IC Role / Device Role / Timing Role: Bidirectional 20-bit buffer with 3-state control, providing voltage translation and bus isolation between domains. Use Value: Eliminates need for discrete level shifters and pull-up resistors; bus-hold prevents floating states during reconfiguration cycles. |
Use Scenario: Driving high-capacitance traces from FPGA GPIOs to external SRAM or flash memory chips. IC Role / Device Role / Timing Role: Noninverting driver with controlled slew and integrated termination for clean signal integrity on 20-bit data/address lines. Use Value: 30-Ω series resistors reduce ringing and EMI; sub-4 ns propagation supports >200 MHz bus clocking. |
| Hot-Swappable Module Controller | Automated Test Equipment (ATE) Signal Conditioning |
|
Use Scenario: Enabling live insertion of daughter cards into powered mainframe backplanes with shared data buses. IC Role / Device Role / Timing Role: Bus buffer with power-off high-Z and auto 3-state - isolates module during insertion/removal. Use Value: Prevents bus contention and current surges; IOFF < ±100 µA ensures no loading on live backplane during card swap. |
Use Scenario: Conditioning digital stimulus/response signals between ATE controller and DUT with mismatched voltage rails. IC Role / Device Role / Timing Role: Precision 20-bit buffer with tight VOH/VOL specs (2.0 V/0.8 V @ 3.3 V) and low skew. Use Value: Guaranteed VIH/VIL margins ensure reliable detection of TTL-level test vectors; distributed power pins minimize measurement noise. |
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 |
|---|---|---|---|
| SN74ALVCH162827GR | Lower static current (ICC < 0.1 mA vs. 0.07–0.1 mA), same pinout and function but lacks auto 3-state and bus-hold. | Suitable where power optimization is critical and external pullups or OE management is acceptable. | Select SN74ALVCH162827GR only if bus-hold and auto 3-state are not required - otherwise SN74ALVTH162827GR provides superior system-level robustness. |
| SN74LVTH162244DGGR | 16-bit (not 20-bit), identical TSSOP-48 package; supports same VCC range and bus-hold, but no auto 3-state. | Applicable for narrower buses; requires two devices for full 20-bit coverage, increasing layout area and BOM count. | Choose SN74LVTH162244DGGR only when 16-bit width suffices or when footprint constraints favor smaller package - not a drop-in replacement. |
Compared with SN74ALVCH162827GR and SN74LVTH162244DGGR, the SN74ALVTH162827GR uniquely combines 20-bit width, bus-hold, auto 3-state, and 5-V tolerance in a single TSSOP-56 package - delivering higher integration and reliability for mixed-voltage backplane designs without layout or firmware trade-offs.
Availability
SN74ALVTH162827GR is available at Aetrix Electronics and suitable for industrial PLC backplane interfaces, FPGA I/O expansion, hot-swappable module controllers, and automated test equipment requiring stable component supply and long-term obsolescence management.
Supply support for SN74ALVTH162827GR 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 decades of expertise in high-reliability interface ICs for industrial and automotive markets.
The SN74ALVTH162827GR belongs to TI's ALVTH Widebus™ family - engineered specifically for robust, low-noise 20-bit buffering in mixed-voltage systems where signal integrity, power sequencing safety, and bus stability are critical.
FAQ
What is the operating temperature range for the SN74ALVTH162827GR?
The SN74ALVTH162827GR is characterized for operation from –40°C to +85°C, meeting industrial-grade thermal requirements. This range is explicitly specified in the SCES079E datasheet under recommended operating conditions and applies to all electrical and switching characteristics in both 2.5-V and 3.3-V configurations.
Does the SN74ALVTH162827GR support 5-V input signals while powered from 3.3 V?
Yes, the SN74ALVTH162827GR supports 5-V-tolerant inputs across its full VI range (–0.5 V to 7 V) when VCC is 2.3 V to 3.6 V. Input clamp current is limited to ±10 µA at 5.5 V, and absolute maximum ratings confirm safe operation - enabling direct connection to 5-V TTL sources without external protection.
How does the auto 3-state feature work on the SN74ALVTH162827GR?
The auto 3-state feature on the SN74ALVTH162827GR disables outputs when any Y pin voltage exceeds VCC + 0.5 V. This prevents bus contention during overvoltage events or hot-plug scenarios. The function is internal and automatic - no OE control or external circuitry is needed to trigger the high-impedance state under these conditions.
What package type is used for the SN74ALVTH162827GR?
The SN74ALVTH162827GR uses a 56-pin Thin Shrink Small-Outline Package (TSSOP), designated DGG by Texas Instruments and marked as "GR" in the orderable part number. Its dimensions are 13.9 mm × 6.0 mm × 1.2 mm max height, with 0.5-mm lead pitch and JEDEC MO-153 compliance.
Can the SN74ALVTH162827GR replace the SN74ALVTH162827DL in an existing design?
Yes - the SN74ALVTH162827GR (TSSOP-56/DGG) and SN74ALVTH162827DL (SSOP-56/DL) share identical logic, pinout, and electrical specifications. However, due to different package footprints and soldering profiles, PCB layout and assembly process validation are required before substitution, despite functional equivalence.
SN74ALVTH162827GR 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:
- 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
SN74ALVTH162827GR FAQ
1.How can I place an order for SN74ALVTH162827GR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74ALVTH162827GR 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 SN74ALVTH162827GR reliable?
The price and inventory of SN74ALVTH162827GR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ALVTH162827GR is usually 5 days.
3.What payment methods are accepted for SN74ALVTH162827GR?
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4.How is shipping managed for SN74ALVTH162827GR?
SN74ALVTH162827GR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74ALVTH162827GR 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 SN74ALVTH162827GR?
For technical support, including SN74ALVTH162827GR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ALVTH162827GR requirements.
6.How does Aetrix verify that SN74ALVTH162827GR is sourced from the original manufacturer or authorized distributors?
All SN74ALVTH162827GR 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 SN74ALVTH162827GR meets industry standards.
7.What is the process for return or replacement of SN74ALVTH162827GR?
All SN74ALVTH162827GR units undergo pre-shipment inspection (PSI). If there is an issue with SN74ALVTH162827GR, 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 SN74ALVTH162827GR part is unused and in its original packaging.
Return procedure for SN74ALVTH162827GR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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