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Texas Instruments SN74ALVTH16827DL
- Part No.:
- SN74ALVTH16827DL
- Manufacturer:
- Texas Instruments
- Package:
- 56-BSSOP (0.295", 7.50mm Width)
- Datasheet:
-
SN74ALVTH16827DL.pdf
- Description:
- IC BUFFER NON-INVERT 3.6V 56SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,423
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Product details
Overview
SN74ALVTH16827DL from Texas Instruments is a 20-bit noninverting buffer/driver with 3-state outputs, designed for 2.5-V/3.3-V operation and TTL-level interfacing in mixed-voltage systems. It delivers ±32/64 mA drive at 3.3 V, features bus-hold on all data inputs, supports live insertion via power-off output disable, and operates from –40°C to 85°C in a 56-pin SSOP (DL) package - used in backplane interface and memory subsystem buffering.
For engineers reviewing the SN74ALVTH16827DL datasheet, SN74ALVTH16827DL pinout, SN74ALVTH16827DL application, or SN74ALVTH16827DL equivalent, key selection criteria include its dual 10-bit sections with independent OE control, 2.3–3.6-V VCC tolerance, 5-V-tolerant I/O, sub-4 ns propagation delay at 3.3 V, and integrated bus-hold eliminating external pull resistors.
Technical Context
The SN74ALVTH16827DL implements two independent 10-bit buffer sections, each controlled by two active-low output-enable inputs (e.g., 1OE1 and 1OE2); both must be low for that section's Y outputs to drive. Its Advanced BiCMOS Technology (ABT) enables low static power dissipation while maintaining high-speed switching performance and robust noise immunity.
It integrates auto 3-state logic that forces outputs into high-impedance when VO exceeds VCC + 0.5 V, prevents bus contention during power-up/down via inherent high-Z behavior below 1.2 V VCC, and uses distributed VCC/GND pins plus flow-through architecture to minimize simultaneous switching noise in dense PCB layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2.3 V to 3.6 V - supports stable operation across 2.5-V and 3.3-V supply rails with mixed-mode 5-V I/O compatibility. |
| Output Drive (3.3 V) | –32 mA / +64 mA - sufficient to drive heavy capacitive loads or multiple TTL inputs without external buffers. |
| Propagation Delay | 1.6–3.0 ns (CL = 50 pF, VCC = 3.3 V) - enables high-speed data path buffering in memory and address buses. |
| Bus-Hold Current | ±75 µA (VI = 0.8 V or 2.0 V, VCC = 3 V) - actively holds floating inputs at valid logic levels, removing need for external pullup/pulldown resistors. |
| Power-Up Behavior | High-impedance state for VCC ≤ 1.2 V - prevents bus conflicts during system power sequencing. |
| ESD Protection | >2000 V HBM, >200 V MM, >1000 V CDM - ensures robust handling in manufacturing and field environments. |
| Operating Temperature | –40°C to +85°C - qualified for industrial-grade embedded and computing applications. |
Pinout & Package
SN74ALVTH16827DL is housed in a 56-pin Plastic Shrink Small-Outline Package (SSOP, DL), 11.4 mm × 4.4 mm × 1.2 mm body height, JEDEC MO-194 compliant, with gull-wing leads and exposed metal thermal pad (non-electrical).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OE1, 1OE2, 2OE1, 2OE2 | Active-low output-enable controls | Each pair enables one 10-bit section; both OE signals per section must be low for output drive - enables fine-grained bus partitioning. |
| 1A1–1A10, 2A1–2A10 | Data inputs | 20 total inputs with integrated bus-hold circuitry - eliminates floating states without external biasing components. |
| 1Y1–1Y10, 2Y1–2Y10 | 3-state buffered outputs | Noninverting outputs with ±32/64 mA drive at 3.3 V; enter high-Z when any OE is high or VCC ≤ 1.2 V. |
| VCC (Pins 7, 21, 36, 50) | Supply voltage | Distributed power pins reduce IR drop and switching noise - critical for signal integrity in wide parallel buses. |
| GND (Pins 4, 11, 17, 29, 33, 40, 46, 53) | Ground reference | Eight GND pins interleaved with VCC and I/O - lowers ground bounce (VOLP < 0.8 V at 3.3 V) and improves EMI performance. |
Key Features
| Feature | Design Value |
|---|---|
| Mixed-mode 5-V I/O tolerance | Inputs and outputs withstand 0–5.5 V regardless of VCC (2.3–3.6 V), enabling seamless interfacing between 3.3-V logic and legacy 5-V subsystems. |
| Auto 3-state detection | Outputs automatically enter high-impedance when VO > VCC + 0.5 V - prevents contention on shared buses during hot-swap or level-shifting events. |
| Live insertion support | Outputs disabled when VCC = 0 V - allows safe board replacement in powered-backplane systems without disrupting bus operation. |
| Flow-through pinout | Input pins on one side, outputs on opposite side, with OE controls adjacent - simplifies layer routing and reduces trace crossovers in dense PCB designs. |
| Latch-up immunity | Exceeds 250 mA per JESD 17 - ensures reliability in noisy industrial environments with transient coupling or ESD events. |
Applications
| Memory Subsystem Buffering | Backplane Data Interface |
|---|---|
Use Scenario: Driving address/data lines between a 3.3-V microcontroller and 5-V SRAM or Flash memory arrays. IC Role / Device Role / Timing Role: Noninverting 20-bit buffer providing level translation, fanout expansion, and bus isolation. Use Value: Eliminates need for discrete level shifters and pull resistors while maintaining sub-3 ns propagation delay for timing-critical memory access cycles. |
Use Scenario: Interfacing processor local bus to a multi-slot 5-V backplane carrying control/status signals. IC Role / Device Role / Timing Role: Bidirectional-capable buffer section managing signal integrity and voltage domain bridging. Use Value: Bus-hold prevents floating states during slot insertion/removal; distributed VCC/GND minimizes ground bounce across 20-line parallel paths. |
| Industrial PLC I/O Expansion | Test Equipment Signal Conditioning |
Use Scenario: Isolating and strengthening digital I/O from an FPGA to external 5-V sensor/actuator modules. IC Role / Device Role / Timing Role: 3-state driver enabling time-multiplexed sharing of common bus lines among multiple peripheral modules. Use Value: Independent OE pairs allow dynamic reconfiguration of 10-bit segments; high drive strength ensures noise margin over long traces. |
Use Scenario: Conditioning parallel trigger and status signals between automated test equipment (ATE) controller and DUT interface boards. IC Role / Device Role / Timing Role: Signal repeater with precise timing control and glitch-free enable/disable transitions. Use Value: tPZL/tPHZ < 4 ns ensures deterministic bus release timing; low ICC (0.07 mA typical disabled) reduces system standby power. |
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 |
|---|---|---|---|
| SN74ALVCH16827GR | Lower drive (–24/24 mA @ 3.3 V), no bus-hold, TVSOP-56 package (1.2 mm height), same pinout. | Suitable for space-constrained designs where lower drive and absence of bus-hold are acceptable. | Select SN74ALVCH16827GR only if board layout requires thinner profile and external pull resistors are already present. |
| SN74LVC16244ADGGR | 3.3-V only (no 5-V I/O tolerance), no bus-hold, 24 mA drive, different pinout (dual 8-bit + 4-bit), TSSOP-48. | Applicable in pure 3.3-V systems with simpler enable architecture and smaller bus widths. | Choose SN74LVC16244ADGGR only when interfacing exclusively within 3.3-V domains and pin compatibility is not required. |
Compared with SN74ALVTH16827DL, SN74ALVCH16827GR trades bus-hold and higher drive for reduced height, while SN74LVC16244ADGGR sacrifices 5-V tolerance and pin compatibility for lower cost and power - neither offers drop-in replacement capability due to functional and mechanical differences.
Availability
SN74ALVTH16827DL is available at Aetrix Electronics and suitable for industrial control systems, memory interface design, backplane interconnect, and test equipment requiring stable component supply with known lifecycle status.
Supply support for SN74ALVTH16827DL 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 company specializing in analog, embedded processing, and logic solutions, with decades of leadership in bus interface and widebus technologies.
The SN74ALVTH16827DL belongs to TI's ALVTH advanced logic family, engineered for high-speed, low-power, mixed-voltage buffering in industrial and computing infrastructure where reliability, noise immunity, and legacy compatibility are critical.
FAQ
What is the operating temperature range for the SN74ALVTH16827DL?
The SN74ALVTH16827DL is characterized for operation from –40°C to +85°C, meeting industrial-grade environmental requirements. This range is validated per the device's recommended operating conditions and applies specifically to the SN74ALVTH16827DL variant in the DL package, as confirmed in the SCES076E datasheet revision December 1998.
Does the SN74ALVTH16827DL support 5-V input and output signaling?
Yes, the SN74ALVTH16827DL supports 5-V-tolerant inputs and outputs while operating from a 2.3–3.6-V VCC supply. Its absolute maximum input voltage is 7 V, and it maintains valid logic thresholds (VIH = 2.0 V, VIL = 0.8 V at 3.3 V) when interfacing with 5-V TTL sources - a core feature documented in the "Mixed-Mode Signal Operation" section of the datasheet.
How does the bus-hold function work on the SN74ALVTH16827DL?
The SN74ALVTH16827DL integrates bus-hold circuitry on all 20 data inputs (1A1–1A10, 2A1–2A10), providing ±75 µA sustaining current at VCC = 3 V to hold floating inputs at valid logic levels. This eliminates the need for external pullup/pulldown resistors and is explicitly enabled by default - no configuration is required to activate bus-hold on the SN74ALVTH16827DL.
Is the SN74ALVTH16827DL pin-compatible with other ALVTH16827 package variants?
No - the SN74ALVTH16827DL (56-pin SSOP) shares identical logic functionality and signal mapping with SN74ALVTH16827DGG (56-pin TSSOP) and SN74ALVTH16827DGV (56-pin TVSOP), but mechanical dimensions, lead pitch, and thermal pad presence differ. While electrical pinout is consistent across DL/DGG/DGV, PCB layout is not interchangeable due to distinct land patterns and soldering requirements.
What is the maximum output current the SN74ALVTH16827DL can sink or source at 3.3 V?
At VCC = 3.3 V, the SN74ALVTH16827DL delivers a minimum output current of –32 mA (high-level sink) and +64 mA (low-level source), as specified under recommended operating conditions with IOL = 32 mA and IOH = –32 mA. These values are guaranteed across temperature and process corners and directly support driving multiple TTL loads or heavy capacitive traces.
SN74ALVTH16827DL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ALVTH
- Package/Case:
- 56-BSSOP (0.295", 7.50mm Width)
- Packaging:
- Bulk
- 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-SSOP
SN74ALVTH16827DL FAQ
1.How can I place an order for SN74ALVTH16827DL through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74ALVTH16827DL 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 SN74ALVTH16827DL reliable?
The price and inventory of SN74ALVTH16827DL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ALVTH16827DL is usually 5 days.
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4.How is shipping managed for SN74ALVTH16827DL?
SN74ALVTH16827DL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74ALVTH16827DL 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 SN74ALVTH16827DL?
For technical support, including SN74ALVTH16827DL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ALVTH16827DL requirements.
6.How does Aetrix verify that SN74ALVTH16827DL is sourced from the original manufacturer or authorized distributors?
All SN74ALVTH16827DL 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 SN74ALVTH16827DL meets industry standards.
7.What is the process for return or replacement of SN74ALVTH16827DL?
All SN74ALVTH16827DL units undergo pre-shipment inspection (PSI). If there is an issue with SN74ALVTH16827DL, 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 SN74ALVTH16827DL part is unused and in its original packaging.
Return procedure for SN74ALVTH16827DL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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