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Texas Instruments SN74ABT16833DLR
- Part No.:
- SN74ABT16833DLR
- Manufacturer:
- Texas Instruments
- Package:
- 56-BSSOP (0.295", 7.50mm Width)
- Datasheet:
-
SN74ABT16833DLR.pdf
- Description:
- IC TXRX NON-INVERT 5.5V 56SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,972
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Product details
Overview
SN74ABT16833DLR from Texas Instruments is a dual 8-bit-to-9-bit parity bus transceiver IC designed for high-speed data bus communication with real-time odd-parity generation and error detection. It features two independent transceivers, each supporting A→B parity generation (–32-mA IOH / 64-mA IOL drive), B→A parity checking with clocked open-collector ERR outputs, and latch-up immunity >500 mA per JESD-17. Used in industrial backplane and memory subsystem interfaces requiring fault-tolerant data integrity.
For engineers reviewing the SN74ABT16833DLR datasheet, SN74ABT16833DLR pinout, SN74ABT16833DLR application, or SN74ABT16833DLR equivalent, key selection criteria include its dual-parity architecture, 56-pin SSOP (DL) package with distributed VCC/GND, flow-through PCB layout optimization, and –40°C to 85°C industrial temperature rating.
Technical Context
The SN74ABT16833DLR implements two independent parity-enabled transceivers using EPIC-IIB BiCMOS technology, enabling simultaneous 8-bit bidirectional data transfer with dedicated parity I/O (1PARITY/2PARITY) and error-flag registers (1ERR/2ERR). Each transceiver supports three operational modes: A→B parity generation, B→A parity checking (clocked on CLK↑), and error-flag clearing via CLR.
Its distributed VCC/GND pin configuration minimizes high-speed switching noise, while the flow-through architecture aligns input and output pins on opposite sides of the 56-pin DL package to simplify trace routing. The ERR outputs are open-collector with active-low assertion, and OEA/OEB control enables full bus isolation or inverted-parity diagnostic mode.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - ensures compatibility with standard 5-V TTL and ABT logic systems without level-shifting. |
| Operating Temperature | –40°C to +85°C - qualified for industrial environments including programmable logic controllers and telecom line cards. |
| Output Drive | –32 mA IOH / 64 mA IOL - drives heavy capacitive loads and long traces in backplane applications without external buffers. |
| Propagation Delay | 1.5 ns to 4.5 ns (tPLH/tPHL) - supports >200-MHz bus toggle rates in synchronous data paths. |
| Parity Function | Odd-parity generation & checking per transceiver - detects single-bit errors on 8-bit data buses with hardware-level latency. |
| Latch-Up Immunity | >500 mA per JESD-17 - prevents destructive latch-up during ESD events or power-rail transients in ruggedized systems. |
| Ground Bounce (VOLP) | <1 V at VCC = 5 V, TA = 25°C - maintains signal integrity during simultaneous switching of all 18 outputs (A/B/parity). |
Pinout & Package
SN74ABT16833DLR uses a 56-pin Shrink Small-Outline Package (SSOP-DL), 300-mil body width, with 0.025-inch (0.635 mm) lead pitch and JEDEC MO-153 compliant footprint. Pin 1 located in Q1 quadrant per tape-and-reel orientation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OEA, 2OEA | Output Enable A (active-low) | Enables A→B data transfer when low; disables A outputs to high-impedance when high. |
| 1OEB, 2OEB | Output Enable B (active-low) | Enables B→A data transfer when low; disables B outputs to high-impedance when high. |
| 1CLK, 2CLK | Clock input | Triggers sampling of B-bus + parity for error detection; clocks 1ERR/2ERR on low-to-high transition. |
| 1CLR, 2CLR | Clear input (active-low) | Resets 1ERR/2ERR flag to high-impedance (open-collector high) when asserted low. |
| 1PARITY, 2PARITY | Parity I/O | Outputs odd-parity bit during A→B transfer; inputs parity for B→A error checking. |
| 1ERR, 2ERR | Error flag output | Open-collector, active-low output indicating odd-parity mismatch on B→A path. |
| 1A1–1A8, 2A1–2A8 | A-bus data inputs/outputs | Noninverting 8-bit data port for source-side bus (e.g., CPU or controller side). |
| 1B1–1B8, 2B1–2B8 | B-bus data inputs/outputs | Noninverting 8-bit data port for destination-side bus (e.g., memory or peripheral side). |
| VCC, GND | Power and ground | Distributed across package (12 VCC, 12 GND pins) to reduce simultaneous switching noise and IR drop. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent parity transceivers | Two fully isolated 8-bit channels enable concurrent parity-checked data transfers between separate bus domains. |
| Flow-through pin architecture | A- and B-port pins placed on opposite sides of the DL package to minimize layer transitions and crosstalk in dense PCB layouts. |
| Inverted-parity diagnostic mode | Asserting both OEA and OEB low forces parity error - provides deterministic system-level fault injection for validation. |
| High-noise-immunity BiCMOS design | EPIC-IIB process delivers <1 V ground bounce and >500 mA latch-up immunity for mission-critical industrial operation. |
| Open-collector ERR with register | ERR state persists until cleared by CLR or overwritten by next CLK edge - supports asynchronous error logging in interrupt-driven firmware. |
Applications
| Industrial Backplane Interface | Memory Subsystem Parity Check |
|---|---|
|
Use Scenario: Bidirectional data exchange between CPU module and I/O expansion chassis over 8-bit parallel backplane. IC Role / Device Role / Timing Role: SN74ABT16833DLR acts as parity-aware bus transceiver, generating odd parity on CPU writes and verifying parity on reads with clock-synchronized ERR assertion. Use Value: Detects single-bit corruption caused by EMI or connector wear before data reaches downstream peripherals, reducing uncorrectable memory errors by >99% in field-deployed PLCs. |
Use Scenario: Interfacing microcontroller address/data bus to external SRAM or Flash with hardware parity protection. IC Role / Device Role / Timing Role: SN74ABT16833DLR sits between MCU D[7:0] and memory DQ[7:0], adding parity bit on write cycles and validating it on read cycles using internal CLK/CLR timing. Use Value: Eliminates need for software parity calculation, cutting memory access latency by 12 ns per cycle and freeing MCU cycles for real-time control tasks. |
| Telecom Line Card Data Path | Ruggedized Data Acquisition System |
|
Use Scenario: High-reliability data forwarding between DSP and FPGA on telecom line card with hot-swap capability. IC Role / Device Role / Timing Role: SN74ABT16833DLR isolates buses during hot-insertion using OEA/OEB control, then enables parity-checked transfer once power rails stabilize. Use Value: Prevents bus contention and parity faults during dynamic reconfiguration, meeting GR-1089-CORE EMI and NEBS Level 3 reliability requirements. |
Use Scenario: Sensor data aggregation from multiple analog front-ends into a central ADC controller in oil-field monitoring equipment. IC Role / Device Role / Timing Role: SN74ABT16833DLR buffers and parity-checks 8-bit sensor channel IDs and status flags before transmission over RS-485. Use Value: Catches wiring faults or transient-induced bit flips in harsh 125°C ambient environments, reducing false alarm rate by 40% versus non-parity designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar parity bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74ABT162244DLR | No parity generation/checking; 16-bit non-inverting buffer only; same DL package and drive strength (–32 mA / 64 mA). | Suitable for general bus isolation where parity is handled in software or upstream logic. | Select when parity functionality is unnecessary and cost reduction is prioritized over error detection capability. |
| SN74LVCH16244ADLR | 3.3-V LVCMOS operation; no parity support; lower drive (–24 mA / 24 mA); same 56-pin DL footprint. | Used in mixed-voltage systems with 3.3-V FPGAs or ASICs; requires level translation for 5-V buses. | Choose for 3.3-V domains needing pin-compatible replacement but sacrificing parity and noise immunity of ABT family. |
Compared with SN74ABT162244DLR and SN74LVCH16244ADLR, the SN74ABT16833DLR uniquely integrates hardware parity generation and checking within the same 56-pin DL package, delivering deterministic error detection without firmware overhead or voltage translation - critical for safety- and reliability-sensitive industrial data paths.
Availability
SN74ABT16833DLR is available at Aetrix Electronics and suitable for industrial backplane interfaces, memory subsystems, telecom line cards, and ruggedized data acquisition systems requiring stable component supply across extended product lifecycles.
Supply support for SN74ABT16833DLR 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 90 years of innovation in industrial, automotive, and communications markets.
The SN74ABT16833DLR belongs to TI's Widebus™ family of high-speed bus interface ICs, engineered specifically for noise-resilient, parity-protected data transfer in mission-critical industrial and telecom infrastructure.
FAQ
What is the operating voltage range for SN74ABT16833DLR?
The SN74ABT16833DLR operates from 4.5 V to 5.5 V, conforming to standard 5-V TTL logic levels. This range ensures robust noise margins and compatibility with legacy 5-V systems while maintaining EPIC-IIB BiCMOS performance. Operation outside this range risks parametric failure or permanent damage per absolute maximum ratings.
How does SN74ABT16833DLR handle parity error detection and reporting?
The SN74ABT16833DLR detects parity errors during B→A data transfer by comparing the 8-bit B-input with the 1PARITY/2PARITY input; a mismatch asserts the open-collector 1ERR/2ERR output low on the rising edge of CLK. The ERR state remains latched until cleared by a low pulse on CLR, enabling firmware to poll or interrupt on error condition.
Can SN74ABT16833DLR be used for unidirectional data transfer without parity?
Yes - SN74ABT16833DLR supports unidirectional operation: assert OEA low and OEB high for A→B only (parity generated), or OEA high and OEB low for B→A only (parity checked). Parity I/O pins default to high-impedance when unused, and inverted-parity mode (both OE low) provides diagnostic capability without requiring external logic.
What is the thermal performance of SN74ABT16833DLR in the DL package?
The SN74ABT16833DLR in the 56-pin DL package has a junction-to-ambient thermal resistance (θJA) of 74°C/W under standard JEDEC test conditions. This allows continuous operation at full drive strength up to +85°C ambient when mounted on 2-layer PCBs with adequate copper pour, per TI's recommended layout guidelines in SCBS097D.
Is SN74ABT16833DLR pin-compatible with other members of the ABT16xx family?
No - SN74ABT16833DLR is not pin-compatible with SN74ABT162244DLR or SN74ABT16373DLR due to distinct pin assignments for parity, error, clock, and clear signals. Its 56-pin DL footprint matches only other ABT16833 variants (e.g., SN74ABT16833DL), and migration requires PCB redesign to accommodate dedicated parity-control signal routing.
SN74ABT16833DLR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ABT
- Package/Case:
- 56-BSSOP (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Logic Type:
- Transceiver, Non-Inverting
- Number of Elements:
- 2
- Number of Bits per Element:
- 8
- Input Type:
- -
- Output Type:
- Push-Pull
- Current - Output High, Low:
- 32mA, 64mA
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 56-SSOP
SN74ABT16833DLR FAQ
1.How can I place an order for SN74ABT16833DLR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74ABT16833DLR 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 SN74ABT16833DLR reliable?
The price and inventory of SN74ABT16833DLR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ABT16833DLR is usually 5 days.
3.What payment methods are accepted for SN74ABT16833DLR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74ABT16833DLR transactions.
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4.How is shipping managed for SN74ABT16833DLR?
SN74ABT16833DLR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74ABT16833DLR 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 SN74ABT16833DLR?
For technical support, including SN74ABT16833DLR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ABT16833DLR requirements.
6.How does Aetrix verify that SN74ABT16833DLR is sourced from the original manufacturer or authorized distributors?
All SN74ABT16833DLR 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 SN74ABT16833DLR meets industry standards.
7.What is the process for return or replacement of SN74ABT16833DLR?
All SN74ABT16833DLR units undergo pre-shipment inspection (PSI). If there is an issue with SN74ABT16833DLR, 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 SN74ABT16833DLR part is unused and in its original packaging.
Return procedure for SN74ABT16833DLR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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