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Texas Instruments SN74ALVCH16827DLR
- Part No.:
- SN74ALVCH16827DLR
- Manufacturer:
- Texas Instruments
- Package:
- 56-BSSOP (0.295", 7.50mm Width)
- Datasheet:
-
SN74ALVCH16827DLR.pdf
- Description:
- IC BUF NON-INVERT 3.6V 56SSOP
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SN74ALVCH16827DLR from Texas Instruments is a 20-bit noninverting buffer/driver with 3-state outputs, designed for 1.65-V to 3.6-V VCC operation. It features two independent 10-bit sections, each with dual output-enable inputs (OE1/OE2), bus-hold circuitry on all data inputs, and operation across –40°C to 85°C. Used in high-density memory address/data buffering and backplane interface applications.
For engineers reviewing the SN74ALVCH16827DLR datasheet, SN74ALVCH16827DLR pinout, SN74ALVCH16827DLR application, or SN74ALVCH16827DLR equivalent, key selection criteria include dual-OE 3-state control logic, bus-hold input retention, 56-pin SSOP (DL) package compatibility, and 1.65–3.6 V wide-supply tolerance for mixed-voltage system interfacing.
Technical Context
The SN74ALVCH16827DLR implements two electrically isolated 10-bit buffer sections, where both OE inputs per section must be low to enable outputs; either high disables all ten Y outputs into high-impedance. Its EPIC™ submicron CMOS process enables fast propagation delay (tpd ≤ 4.1 ns at VCC = 1.8 V) and low dynamic power dissipation (Cpd = 16 pF typical at 1.8 V).
Bus-hold circuitry actively maintains valid logic levels on unused or floating A inputs without external resistors, reducing BOM count and layout complexity. Absolute maximum ratings include ±50 mA continuous output current and 4.6 V absolute max supply voltage, supporting robust interoperability with legacy 5-V tolerant systems via level-shifting interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 1.65 V to 3.6 V - Enables direct interfacing between 1.8-V, 2.5-V, and 3.3-V logic domains without level shifters. |
| Output Drive | ±24 mA at 3 V - Sufficient to drive 50-pF loads with <4.1 ns propagation delay, supporting high-speed bus loading. |
| Bus-Hold Current | ±75 µA at 3 V - Actively retains input state during float conditions, eliminating need for external pullup/pulldown resistors. |
| IOZ (Off-State Leakage) | ±10 µA at 3.6 V - Ensures minimal signal coupling when outputs are disabled, critical for shared-bus contention avoidance. |
| Operating Temp | –40°C to +85°C - Qualified for industrial-grade embedded control, telecom infrastructure, and automated test equipment. |
| ESD Rating | >2000 V HBM - Meets MIL-STD-883 Method 3015, enabling reliable handling in standard assembly environments. |
| Power Dissipation | 40 µA ICC typical at 3.6 V - Ultra-low static current supports battery-backed or always-on subsystems. |
Pinout & Package
SN74ALVCH16827DLR is housed in a 56-pin Shrink Small-Outline Package (SSOP), designated DL, with 0.5-mm lead pitch, 13.9–14.1 mm body width, and 1.2 mm max height. The package is RoHS-compliant, moisture sensitivity level 1, and rated for reflow up to 260°C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OE1, 1OE2, 2OE1, 2OE2 | Section Output Enable Inputs | Both OE signals per 10-bit section must be low to activate corresponding Y outputs; any high forces high-Z - enables fine-grained bus arbitration. |
| 1A1–1A10, 2A1–2A10 | Data Inputs | Bus-hold enabled - retains last valid logic state when un-driven, preventing metastability in unterminated stubs or hot-swap scenarios. |
| 1Y1–1Y10, 2Y1–2Y10 | 3-State Buffered Outputs | Noninverting outputs with ±24 mA drive strength; high-Z state isolates sections during bus sharing or power sequencing. |
| VCC, GND | Power Rails | Dual VCC/GND pairs per 10-bit section - reduces switching noise coupling and improves PSRR in high-speed operation. |
Key Features
| Feature | Design Value |
|---|---|
| Dual Independent 10-Bit Sections | Enables asynchronous control of two 10-bit buses using separate OE pairs - ideal for split-address/data paths or redundant channel buffering. |
| Integrated Bus-Hold Circuitry | Eliminates external biasing components on all 20 data inputs, reducing PCB area and assembly cost while improving reliability in noisy or intermittently connected systems. |
| Wide VCC Range (1.65–3.6 V) | Supports seamless integration across mixed-voltage FPGA I/O banks, ASIC core/logic domains, and legacy 3.3-V peripherals without external translation. |
| Low Propagation Delay | tpd ≤ 4.1 ns at 1.8 V ensures timing-critical applications (e.g., memory address latching, clock distribution fanout) meet tight setup/hold windows. |
| High ESD/Latch-Up Robustness | 2000 V HBM ESD rating and >250 mA latch-up immunity allow safe deployment in field-replaceable modules and industrial I/O cards. |
Applications
| Memory Interface Buffering | Backplane Data Routing |
|---|---|
Use Scenario: Buffering address and data lines between a microcontroller and parallel NOR flash or SRAM in space-constrained industrial controllers. IC Role / Device Role / Timing Role: Noninverting 20-bit driver providing level translation, fanout amplification, and bus isolation during read/write cycles. Use Value: Dual-section OE control allows independent gating of address vs. data buses, minimizing bus contention and enabling partial memory access without full bus release. | Use Scenario: Interfacing multiple line cards to a central switch fabric in modular telecom chassis with shared parallel control buses. IC Role / Device Role / Timing Role: 3-state buffer managing bidirectional data flow across backplane traces with strict skew and loading requirements. Use Value: Bus-hold inputs prevent floating states during card insertion/removal, avoiding spurious writes or configuration corruption during hot-swap events. |
| FPGA I/O Expansion | Industrial PLC I/O Conditioning |
Use Scenario: Extending limited FPGA GPIO count to drive 20-channel LED arrays, relay drivers, or sensor multiplexers in factory automation panels. IC Role / Device Role / Timing Role: Level-translating buffer translating 1.8-V FPGA outputs to 3.3-V peripheral logic while providing current gain and noise margin. Use Value: Wide VCC range allows direct connection to FPGA VCCIO banks set at 1.8 V, 2.5 V, or 3.3 V - no external level shifters required. | Use Scenario: Isolating programmable logic controller (PLC) CPU bus from ruggedized I/O modules exposed to EMI and voltage transients in motor control cabinets. IC Role / Device Role / Timing Role: High-immunity buffer decoupling sensitive CPU data/address lines from noisy field-side peripherals. Use Value: 2000 V HBM ESD protection and –40°C to +85°C qualification ensure stable operation in electrically harsh industrial environments without derating. |
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 |
|---|---|---|---|
| SN74LVC16244ADGGR | Lower drive (±24 mA at 3.3 V only); no bus-hold; 16-bit (not 20-bit); TSSOP-48 package. | Lacks bus-hold and dual-OE per section; requires external pullups and cannot replace 20-bit functionality without redesign. | Select only if 16-bit width suffices and bus-hold is unnecessary; verify pinout mapping and OE logic compatibility. |
| SN74AVC16835DGGR | 20-bit, dual-OE, bus-hold, but supports 1.2–3.6 V; higher speed (tpd ≤ 2.8 ns at 1.8 V); TSSOP-56 package. | Broadened VCC range and faster timing suit next-gen ultra-low-voltage systems; identical functional behavior with improved specs. | Drop-in alternative for new designs requiring lower VCC headroom or tighter timing margins; same pinout and logic behavior as SN74ALVCH16827DLR. |
Compared with SN74LVC16244ADGGR, SN74ALVCH16827DLR provides full 20-bit width, integrated bus-hold, and dual-OE control - essential for legacy-compatible industrial backplanes. Against SN74AVC16835DGGR, it trades minor speed/VCC-range advantages for proven long-term availability and established qualification history in deployed systems.
Availability
SN74ALVCH16827DLR is available at Aetrix Electronics and suitable for memory interface buffering, backplane data routing, FPGA I/O expansion, industrial PLC I/O conditioning, and telecom control bus applications requiring stable component supply and long-lifecycle support.
Supply support for SN74ALVCH16827DLR 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 experience in high-reliability industrial and automotive IC design.
The SN74ALVCH16827DLR belongs to TI's Widebus™ family of advanced logic devices, engineered specifically for high-speed, low-voltage bus interface applications in dense, mixed-signal embedded systems.
FAQ
What is the recommended power-up sequence for SN74ALVCH16827DLR to avoid bus contention?
To prevent undefined output states during power-up, tie all OE inputs (1OE1, 1OE2, 2OE1, 2OE2) to VCC through a pullup resistor. The minimum resistance value depends on the driver's current-sinking capability - typically 10 kΩ suffices for most applications. This ensures outputs remain in high-impedance until firmware asserts valid OE control, protecting downstream devices. The SN74ALVCH16827DLR datasheet specifies this requirement explicitly for safe initialization.
Does SN74ALVCH16827DLR support hot-swap operation with live backplane insertion?
Yes - SN74ALVCH16827DLR supports hot-swap due to its bus-hold circuitry on all 20 data inputs, which actively retains the last valid logic state during floating conditions. Combined with its 2000 V HBM ESD rating and robust 3.6 V absolute maximum VCC, the SN74ALVCH16827DLR withstands transient surges and contact bounce during live insertion into powered backplanes without latch-up or damage.
Can SN74ALVCH16827DLR operate reliably at 1.65 V VCC with full timing specifications met?
Yes - SN74ALVCH16827DLR is fully characterized down to 1.65 V VCC. At this minimum supply, propagation delay remains ≤ 4.1 ns (tpd), output enable time ≤ 6 ns (ten), and disable time ≤ 5.6 ns (tdis), all within datasheet limits. The device maintains ±4 mA drive strength and valid VIH/VIL thresholds across the entire 1.65–3.6 V range, making SN74ALVCH16827DLR suitable for ultra-low-power portable and battery-operated systems.
How does the dual-output-enable architecture of SN74ALVCH16827DLR improve system-level bus arbitration?
The dual-OE structure per 10-bit section (e.g., 1OE1 and 1OE2 for Section 1) requires both signals to be low for Y outputs to drive - enabling AND-gated bus enable logic. This allows hierarchical control: one OE may come from a global bus grant signal, the other from a local peripheral select, preventing accidental activation. In SN74ALVCH16827DLR, this architecture eliminates race conditions during multi-master arbitration and simplifies glue logic compared to single-OE alternatives.
Is SN74ALVCH16827DLR pin-compatible with earlier SN74ALVCH16827 variants in DL or DGG packages?
Yes - SN74ALVCH16827DLR shares identical pinout, electrical behavior, and functional logic with all SN74ALVCH16827 variants in DL (SSOP) and DGG (TSSOP) packages. The "R" suffix denotes tape-and-reel packaging; core silicon and pin mapping are identical across SN74ALVCH16827DL, SN74ALVCH16827DL.B, SN74ALVCH16827DGGR, and SN74ALVCH16827DGGR.B. No PCB changes are required when substituting SN74ALVCH16827DLR for these variants.
SN74ALVCH16827DLR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ALVCH
- Package/Case:
- 56-BSSOP (0.295", 7.50mm 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:
- 24mA, 24mA
- Voltage - Supply:
- 1.65V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 56-SSOP
SN74ALVCH16827DLR FAQ
1.How can I place an order for SN74ALVCH16827DLR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74ALVCH16827DLR 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 SN74ALVCH16827DLR reliable?
The price and inventory of SN74ALVCH16827DLR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ALVCH16827DLR is usually 5 days.
3.What payment methods are accepted for SN74ALVCH16827DLR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74ALVCH16827DLR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74ALVCH16827DLR?
SN74ALVCH16827DLR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74ALVCH16827DLR 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 SN74ALVCH16827DLR?
For technical support, including SN74ALVCH16827DLR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ALVCH16827DLR requirements.
6.How does Aetrix verify that SN74ALVCH16827DLR is sourced from the original manufacturer or authorized distributors?
All SN74ALVCH16827DLR 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 SN74ALVCH16827DLR meets industry standards.
7.What is the process for return or replacement of SN74ALVCH16827DLR?
All SN74ALVCH16827DLR units undergo pre-shipment inspection (PSI). If there is an issue with SN74ALVCH16827DLR, 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 SN74ALVCH16827DLR part is unused and in its original packaging.
Return procedure for SN74ALVCH16827DLR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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