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Texas Instruments SN74ABT16833DGGR
- Part No.:
- SN74ABT16833DGGR
- Manufacturer:
- Texas Instruments
- Package:
- 56-TFSOP (0.240", 6.10mm Width)
- Datasheet:
-
SN74ABT16833DGGR.pdf
- Description:
- IC TXRX NON-INVERT 5.5V 56TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,102
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Product details
Overview
SN74ABT16833 from Texas Instruments is a dual 8-bit-to-9-bit parity bus transceiver IC designed for high-speed bidirectional data communication between parallel buses with real-time odd-parity generation and checking. It features two independent transceivers, each supporting A→B parity generation (–32-mA IOH / 64-mA IOL drive), B→A parity validation with clocked open-collector error flag (1ERR/2ERR), and latch-up immunity >500 mA per JESD-17 - used in industrial backplane and memory subsystem interconnects.
For engineers reviewing the SN74ABT16833 datasheet, SN74ABT16833 pinout, SN74ABT16833 application, or SN74ABT16833 equivalent, key selection criteria include its dual-parity-error-flag register, flow-through pinout for PCB layout optimization, distributed VCC/GND configuration to suppress ground bounce (<1 V VOLP at 5 V), and compatibility with 5-V TTL-level systems requiring robust bus isolation and diagnostic capability.
Technical Context
The SN74ABT16833 implements two independent parity-aware transceivers, each with separate clock (CLK), clear (CLR), output-enable (OEA/OEB), and parity I/O (PARITY) signals. Parity generation occurs on A→B transfers; PARITY becomes input during B→A transfers to enable odd-parity checking against B-bus data plus PARITY bit.
Error detection is synchronized to CLK rising edge: B→A parity mismatch latches into ERR as active-low open-collector output, cleared only by asserting CLR low. The device uses EPIC-IIB BiCMOS process for low power dissipation while maintaining high-drive capability and JEDEC JESD-17 latch-up compliance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - ensures interoperability with standard 5-V TTL logic families and stable operation across industrial temperature range. |
| Operating Temperature | –40°C to +85°C - qualified for industrial-grade embedded control and communications equipment. |
| Output Drive | –32 mA IOH / 64 mA IOL - supports heavy capacitive loads and long trace routing without signal degradation. |
| Propagation Delay | 1.5 ns (min) to 4.5 ns (max) - enables sub-200-MHz bus timing margins in synchronous backplane applications. |
| Ground Bounce (VOLP) | <1 V at VCC = 5 V, TA = 25°C - minimizes switching noise-induced false logic transitions in dense PCB layouts. |
| Latch-Up Immunity | >500 mA per JESD-17 - guarantees robustness against transient current surges in electrically noisy environments. |
| Input Clamp Current | –18 mA - protects inputs from negative voltage transients up to –0.5 V without external diodes. |
Pinout & Package
SN74ABT16833 is packaged in a 56-pin Thin Shrink Small-Outline (DGG) package with 0.5-mm pitch, optimized for high-density PCBs and thermal performance (θJA = 81°C/W). Pin numbering follows standard top-view orientation with Pin 1 in Q1 quadrant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OEA, 2OEA | Output Enable A (active-low) | Controls direction of Transceiver 1/2 A→B path; low enables A-bus drivers, high places outputs in high-Z. |
| 1OEB, 2OEB | Output Enable B (active-low) | Controls direction of Transceiver 1/2 B→A path; low enables B-bus drivers, high places outputs in high-Z. |
| 1CLK, 2CLK | Clock Input | Rising edge latches B→A parity error into 1ERR/2ERR; synchronizes fault reporting to system timing domain. |
| 1CLR, 2CLR | Clear Input (active-low) | Resets 1ERR/2ERR output high (open-collector pull-up); essential for error recovery and diagnostic reset. |
| 1PARITY, 2PARITY | Parity I/O | Outputs odd-parity bit during A→B transfer; inputs parity bit during B→A transfer for error checking. |
| 1ERR, 2ERR | Error Flag Output | Open-collector, active-low output indicating B→A odd-parity mismatch; requires external pull-up resistor. |
| 1A1–1A8, 2A1–2A8 | A-Bus Data Inputs/Outputs | Noninverting 8-bit data ports for first/second transceiver; driven when corresponding OEA low and OEB high. |
| 1B1–1B8, 2B1–2B8 | B-Bus Data Inputs/Outputs | Noninverting 8-bit data ports for first/second transceiver; driven when corresponding OEB low and OEA high. |
| VCC, GND | Power Supply | Distributed VCC/GND pins (12 total) minimize simultaneous switching noise and improve signal integrity. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent parity transceivers | Enables two isolated 8-bit bus domains to share parity-checking logic without cross-talk or timing coupling. |
| Flow-through architecture | Input and output pins arranged opposite each other (e.g., A1–A8 on left, B1–B8 on right) simplifies layer routing and reduces trace length. |
| Clocked parity-error flag register | 1ERR/2ERR captures transient parity faults on CLK edge, enabling deterministic fault logging in synchronous systems. |
| Inverted-parity diagnostic mode | Asserting both OEA and OEB low forces parity error - provides hardware-level bus integrity test without software intervention. |
| High-noise-immunity BiCMOS design | EPIC-IIB process delivers TTL-compatible thresholds with CMOS-like static power and rail-to-rail noise margins. |
Applications
| Industrial Backplane Interconnect | Memory Subsystem Data Path |
|---|---|
|
Use Scenario: Bidirectional data transfer between CPU and peripheral modules across a 16-bit parallel backplane with ECC support. IC Role / Device Role / Timing Role: SN74ABT16833 acts as parity-aware bus transceiver, generating odd parity on write cycles and validating it on read cycles with clock-synchronized error flag assertion. Use Value: Enables real-time detection of single-bit corruption in high-noise industrial chassis environments without adding latency to critical data paths. |
Use Scenario: Interfacing SRAM or Flash memory banks to a microcontroller with parity-enabled address/data buses. IC Role / Device Role / Timing Role: SN74ABT16833 serves as parity generator/checker between MCU data bus and memory data bus, using dedicated CLK/CLR to align with memory access timing. Use Value: Provides hardware-level parity protection for memory transactions, reducing firmware overhead and improving system reliability in unattended operation. |
| Test Equipment Bus Interface | Programmable Logic Controller (PLC) I/O Expansion |
|
Use Scenario: Connecting modular instrument cards (e.g., DIO, ADC) to a central controller via shared parallel bus with fault diagnostics. IC Role / Device Role / Timing Role: SN74ABT16833 isolates card-specific data lanes while providing per-lane parity error flags for automated module health monitoring. Use Value: Allows hot-swap-capable expansion with immediate identification of faulty modules via ERR line status, minimizing system downtime. |
Use Scenario: Extending digital I/O capacity in ruggedized PLC chassis where EMI and voltage transients are common. IC Role / Device Role / Timing Role: SN74ABT16833 buffers and validates I/O data between CPU bus and remote I/O modules, leveraging inverted-parity mode for periodic self-test. Use Value: Enhances functional safety by detecting wiring faults or connector degradation before they cause control loop failures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar parity bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74ABT162245DGGR | No parity generation/checking; dual 8-bit non-inverting transceiver only; identical pinout and drive strength. | Suitable where bus isolation is required but parity is handled elsewhere (e.g., by FPGA or CPU). | Select when parity logic resides outside the bus interface and maximum pin compatibility with SN74ABT16833 layout is critical. |
| 74FCT16833CTPAG | FCT-family CMOS; lower drive (–24 mA IOH / 24 mA IOL); no open-collector ERR; different timing and voltage thresholds. | Used in lower-power, cost-sensitive designs where full ABT-series noise immunity and drive are not required. | Choose for legacy FCT-based systems needing functional parity transceivers but accepting reduced noise margin and drive capability. |
Compared with SN74ABT16833, SN74ABT162245DGGR removes parity functionality while preserving pinout and drive - ideal for layout reuse without parity; 74FCT16833CTPAG offers parity but trades off ABT's high drive and latch-up immunity for lower power and cost in less demanding environments.
Availability
SN74ABT16833 is available at Aetrix Electronics and suitable for industrial backplane interconnect, memory subsystem data path, and programmable logic controller I/O expansion requiring stable component supply and long-term obsolescence management.
Supply support for SN74ABT16833 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 SN74ABT16833 belongs to TI's Widebus™ family of high-speed bus interface devices, engineered specifically for noise-resilient, high-drive parallel bus communication in industrial and computing infrastructure.
FAQ
What is the operating temperature range for the SN74ABT16833?
The SN74ABT16833 is rated for industrial operation from –40°C to +85°C. This range is validated per the manufacturer's recommended operating conditions and supports deployment in harsh environments such as factory automation controllers and outdoor telecom equipment where ambient temperatures fluctuate significantly. The SN74ABT16833 does not support extended military-range operation like its SN54ABT16833 counterpart.
How does the SN74ABT16833 handle parity error detection and reporting?
The SN74ABT16833 detects parity errors during B→A data transfers by comparing the incoming B-bus data plus the PARITY input bit against odd-parity expectation. A mismatch triggers an active-low signal on the corresponding ERR output (1ERR or 2ERR), which is latched on the rising edge of CLK and cleared only by asserting CLR low. This behavior is confirmed in the device's FUNCTION TABLE and ERROR-FLAG FUNCTION TABLE sections of the datasheet.
Can the SN74ABT16833 be used in systems with mixed 3.3-V and 5-V logic?
No - the SN74ABT16833 is strictly a 5-V device with VIH = 2 V and VIL = 0.8 V, and absolute maximum ratings specifying VCC up to 7 V but no guaranteed operation below 4.5 V. It lacks 3.3-V tolerant inputs or dual-supply capability. Using it with 3.3-V logic without level translation risks incorrect sampling or damage due to input overvoltage if 3.3-V signals exceed 0.8 V VIL threshold under noise.
What is the purpose of the inverted-parity mode in the SN74ABT16833?
When both OEA and OEB are low, the SN74ABT16833 enters inverted-parity mode: it generates forced parity errors regardless of data content. This provides a hardware-level diagnostic feature that allows system firmware to verify ERR flag path integrity, CLK/CLR timing alignment, and downstream interrupt handling - all without requiring known-good data patterns or external stimulus.
Is the SN74ABT16833 pin-compatible with other members of the ABT16xx series?
No - the SN74ABT16833 has a unique 56-pin DGG package and signal assignment optimized for dual-parity operation, including dedicated 1CLK/2CLK, 1CLR/2CLR, and dual ERR/PARITY pins. Devices like SN74ABT162245 (non-parity) share the same footprint but lack parity-related pins and repurpose those locations for additional data or control lines, making direct substitution impossible without PCB revision.
SN74ABT16833DGGR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ABT
- Package/Case:
- 56-TFSOP (0.240", 6.10mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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-TSSOP
SN74ABT16833DGGR FAQ
1.How can I place an order for SN74ABT16833DGGR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74ABT16833DGGR 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 SN74ABT16833DGGR reliable?
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For technical support, including SN74ABT16833DGGR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ABT16833DGGR requirements.
6.How does Aetrix verify that SN74ABT16833DGGR is sourced from the original manufacturer or authorized distributors?
All SN74ABT16833DGGR 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 SN74ABT16833DGGR meets industry standards.
7.What is the process for return or replacement of SN74ABT16833DGGR?
All SN74ABT16833DGGR units undergo pre-shipment inspection (PSI). If there is an issue with SN74ABT16833DGGR, 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 SN74ABT16833DGGR part is unused and in its original packaging.
Return procedure for SN74ABT16833DGGR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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