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Texas Instruments SN74ABT16833DLRG4
- Part No.:
- SN74ABT16833DLRG4
- Manufacturer:
- Texas Instruments
- Package:
- 56-BSSOP (0.295", 7.50mm Width)
- Datasheet:
-
SN74ABT16833DLRG4.pdf
- Description:
- IC TXRX NON-INVERT 5.5V 56SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,966
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Product details
Overview
SN74ABT16833DLRG4 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 (1PARITY/2PARITY) and B→A parity checking with latched open-collector error flags (1ERR/2ERR), operating at 4.5–5.5 V with –32-mA/64-mA drive strength. It is used in fault-tolerant industrial backplanes and legacy computing systems requiring bus integrity monitoring.
For engineers reviewing the SN74ABT16833DLRG4 datasheet, SN74ABT16833DLRG4 pinout, SN74ABT16833DLRG4 application, or SN74ABT16833DLRG4 equivalent, key selection criteria include its dual-parity-error flag register, flow-through architecture for PCB layout optimization, distributed VCC/GND pinning to suppress switching noise, and compatibility with 5-V TTL-level control and data buses.
Technical Context
The SN74ABT16833DLRG4 implements two independent parity-aware transceivers, each with separate clock (CLK), clear (CLR), output-enable (OEA/OEB), and parity I/O (PARITY) terminals. Each channel supports bidirectional 8-bit data transfer between A and B buses while generating or verifying odd parity across all eight bits plus the PARITY pin - enabling real-time error detection on B→A transfers.
Its EPIC-IIB BiCMOS process delivers low ground bounce (<1 V VOLP), latch-up immunity >500 mA per JEDEC JESD-17, and high-drive outputs (–32 mA IOH, 64 mA IOL). The error flag (ERR) is edge-triggered on CLK's low-to-high transition and cleared asynchronously via CLR, with internal storage allowing diagnostic capture without continuous polling.
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 CMOS logic rails without level-shifting. |
| Operating Temperature | –40°C to +85°C - qualified for industrial-grade embedded systems and communications equipment. |
| Output Drive | –32 mA IOH / 64 mA IOL - drives heavy capacitive loads and long traces typical in backplane applications. |
| Propagation Delay | 1.5–4.2 ns (tPLH/tPHL) - enables reliable operation in high-speed synchronous bus environments up to ~200 MHz. |
| Parity Function | Odd-parity generation on A→B; parity checking + latched ERR flag on B→A - provides deterministic bus integrity verification. |
| Input Thresholds | VIH = 2.0 V, VIL = 0.8 V - matches standard TTL input levels for seamless integration into mixed-logic systems. |
| Package | 56-pin SSOP (DL) - surface-mount footprint optimized for automated assembly and thermal dissipation (θJA = 74°C/W). |
Pinout & Package
SN74ABT16833DLRG4 is housed in a 56-pin Shrink Small-Outline Package (SSOP-DL), 300-mil body width, with 0.025-inch (0.635 mm) lead pitch and gull-wing leads. The package features distributed VCC and GND pins to minimize simultaneous switching noise and supports reflow soldering per MSL Level-1 (260°C peak).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OEA, 2OEA, 1OEB, 2OEB | Output Enable (active-low) | Controls direction and high-impedance state per transceiver; both OEA/OEB low enables A→B transfer with inverted parity. |
| 1CLK, 2CLK | Clock Input | Edge-triggered sampling of B-bus parity for ERR flag update on low-to-high transition. |
| 1CLR, 2CLR | Asynchronous Clear | Resets ERR flag high independently of CLK; essential for error recovery and diagnostic reset. |
| 1PARITY, 2PARITY | Parity I/O | Output during A→B transfer (odd-parity bit); input during B→A transfer (combined with B-data for error check). |
| 1ERR, 2ERR | Open-Collector Error Flag | Active-low, latched parity error signal; requires external pull-up for wired-OR fault-bus interfacing. |
| 1A1–1A8, 2A1–2A8 | A-Bus Data Inputs/Outputs | Noninverting 8-bit data port for source-side bus; driven when OEA low and OEB high (A→B mode). |
| 1B1–1B8, 2B1–2B8 | B-Bus Data Inputs/Outputs | Noninverting 8-bit data port for destination-side bus; driven when OEB low and OEA high (B→A mode). |
| VCC, GND | Power & Ground | Distributed across package (12 VCC, 12 GND pins) - reduces IR drop and high-frequency impedance for stable switching. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent parity transceivers | Enables concurrent parity-checked data paths - e.g., separate address and data bus integrity in memory controllers. |
| Flow-through pin architecture | Minimizes trace length and layer transitions on PCB - reduces skew, crosstalk, and EMI in dense layouts. |
| Latched parity-error flag register | Persists error state until explicitly cleared by CLR - allows host processor to service faults asynchronously without missing events. |
| Inverted parity mode | Forces active-low ERR when both OEA and OEB are low - provides deterministic fault injection for system diagnostics and test coverage. |
| High-noise-immunity BiCMOS design | VOLP < 1 V at 5 V/25°C and latch-up >500 mA - ensures robust operation in electrically noisy industrial environments. |
Applications
| Industrial Backplane Bus | Legacy Computer Memory Controller |
|---|---|
|
Use Scenario: Bidirectional data transfer between CPU and peripheral modules over a shared 8-bit parallel bus with real-time fault detection. IC Role / Device Role / Timing Role: SN74ABT16833DLRG4 acts as a parity-aware bus interface, generating odd parity on write cycles and validating it on read cycles using dedicated CLK/CLR timing controls. Use Value: Detects single-bit corruption caused by EMI or aging interconnects before data is committed - preventing silent data corruption in safety-critical PLCs. |
Use Scenario: Interfacing a microprocessor's address/data bus to DRAM banks with parity support in retro-computing or embedded instrumentation systems. IC Role / Device Role / Timing Role: SN74ABT16833DLRG4 serves as a timing-synchronized parity transceiver, latching B→A errors on CLK edges and holding them until serviced by the CPU's interrupt handler. Use Value: Enables hardware-level memory integrity checking without software overhead - critical for deterministic response in real-time control loops. |
| Telecom Line Card Interface | Test Equipment Data Acquisition Bus |
|
Use Scenario: Isolating and validating data between FPGA-based packet processors and analog front-end ASICs in modular telecom line cards. IC Role / Device Role / Timing Role: SN74ABT16833DLRG4 functions as a fault-detecting bus buffer, using OEA/OEB to gate transfers and ERR to signal parity mismatches to the supervisory MCU. Use Value: Provides early warning of signal integrity degradation (e.g., connector wear or voltage droop) before frame errors escalate into link resets. |
Use Scenario: Aggregating sensor readings from multiple ADCs onto a central controller bus where data integrity must be verified before storage or transmission. IC Role / Device Role / Timing Role: SN74ABT16833DLRG4 operates in A→B mode to generate parity for raw sensor data streams, then switches to B→A mode to verify checksummed results returned from calibration firmware. Use Value: Guarantees end-to-end data fidelity across multi-stage acquisition pipelines - meeting traceability requirements for metrology-grade instruments. |
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 with 32-mA/64-mA drive. | Suitable only for isolation or fan-out - lacks parity logic, ERR flag, CLK/CLR controls, and dual-bus arbitration. | Select when bus integrity is handled at higher protocol layers (e.g., CRC in firmware) and only buffering is required. |
| 74FCT16833CTPAG | FCT-family CMOS; lower drive (–24 mA/24 mA), no latched ERR register, different timing (tPLH/tPHL ≈ 5.5 ns). | Compatible pinout but lacks flow-through layout and distributed power pins - higher noise susceptibility in dense layouts. | Choose for cost-sensitive designs where full SN74ABT16833DLRG4 feature set is unnecessary and slower timing is acceptable. |
Compared with SN74ABT16833DLRG4, SN74ABT162244DLR omits parity functionality entirely, while 74FCT16833CTPAG provides basic parity support without latched error reporting or optimized noise suppression - making SN74ABT16833DLRG4 uniquely suited for deterministic, hardware-level bus integrity in mission-critical industrial systems.
Availability
SN74ABT16833DLRG4 is available at Aetrix Electronics and suitable for industrial backplanes, legacy memory controllers, telecom line cards, and test equipment data acquisition buses requiring stable component supply and long-term obsolescence management.
Supply support for SN74ABT16833DLRG4 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 heritage in high-reliability industrial and aerospace components.
The SN74ABT16833DLRG4 belongs to TI's Widebus™ family of advanced bus interface ICs, engineered specifically for high-speed, noise-resilient parallel data transfer in industrial control, communications infrastructure, and legacy system upgrades.
FAQ
What is the function of the 1PARITY and 2PARITY pins on the SN74ABT16833DLRG4?
The 1PARITY and 2PARITY pins serve as bidirectional parity I/O terminals. During A→B data transfer, each outputs an odd-parity bit computed across its associated 8-bit A-bus. During B→A transfer, each functions as an input - combined with the B-bus data to detect odd-parity violations, triggering the corresponding ERR flag. This dual-role design enables compact, self-contained parity handling within SN74ABT16833DLRG4 without external logic.
How does the SN74ABT16833DLRG4 handle power-up sequencing to avoid bus contention?
To ensure high-impedance state during power-up or power-down, the OE inputs (1OEA, 1OEB, 2OEA, 2OEB) of the SN74ABT16833DLRG4 must be tied to VCC through a pull-up resistor. TI specifies the minimum resistance based on the driver's current-sinking capability - typically 4.7 kΩ - preventing unintended bus driving before system initialization completes. This safeguard is critical for hot-swap-capable backplanes and modular systems.
Can the SN74ABT16833DLRG4 operate with mixed-voltage interfaces, such as 3.3-V control signals?
No - the SN74ABT16833DLRG4 is specified only for 4.5–5.5 V operation and TTL-compatible input thresholds (VIH = 2.0 V, VIL = 0.8 V). While 3.3-V logic may meet VIH min under ideal conditions, TI does not guarantee functionality or noise margin outside the rated 5-V range. For mixed-voltage systems, level-shifting circuitry or a 3.3-V-compatible alternative (e.g., SN74LVC16833) must be used instead of relying on SN74ABT16833DLRG4 directly.
What is the purpose of the "inverted parity" mode when both OEA and OEB are low on the SN74ABT16833DLRG4?
When both OEA and OEB are low, the SN74ABT16833DLRG4 forces an active-low ERR output regardless of bus data - generating a deterministic error condition. This mode is intended for system diagnostics, enabling validation of error-handling firmware, interrupt routing, and downstream fault-reporting logic without requiring actual data corruption. It provides controllable, repeatable test coverage unattainable with random parity errors.
Is the SN74ABT16833DLRG4 pin-compatible with the military-grade SN54ABT16833?
Yes - SN74ABT16833DLRG4 (DL package) shares identical pinout and logic behavior with the SN54ABT16833 in WD ceramic flatpack, including all control, data, parity, and error terminals. However, SN54ABT16833 is characterized for –55°C to +125°C and uses different packaging materials and screening; SN74ABT16833DLRG4 is rated for –40°C to +85°C and is not tested to MIL-STD-883 requirements. Electrical timing and DC specs are otherwise aligned per the shared SCBS097D datasheet.
SN74ABT16833DLRG4 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:
- Discontinued at Digi-Key
- 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
SN74ABT16833DLRG4 FAQ
1.How can I place an order for SN74ABT16833DLRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74ABT16833DLRG4 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 SN74ABT16833DLRG4 reliable?
The price and inventory of SN74ABT16833DLRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ABT16833DLRG4 is usually 5 days.
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Once your SN74ABT16833DLRG4 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 SN74ABT16833DLRG4?
For technical support, including SN74ABT16833DLRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ABT16833DLRG4 requirements.
6.How does Aetrix verify that SN74ABT16833DLRG4 is sourced from the original manufacturer or authorized distributors?
All SN74ABT16833DLRG4 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 SN74ABT16833DLRG4 meets industry standards.
7.What is the process for return or replacement of SN74ABT16833DLRG4?
All SN74ABT16833DLRG4 units undergo pre-shipment inspection (PSI). If there is an issue with SN74ABT16833DLRG4, 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 SN74ABT16833DLRG4 part is unused and in its original packaging.
Return procedure for SN74ABT16833DLRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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