My Inquiry
My Account
Texas Instruments SN74ABT833NT
- Part No.:
- SN74ABT833NT
- Manufacturer:
- Texas Instruments
- Package:
- 24-DIP (0.300", 7.62mm)
- Datasheet:
-
SN74ABT833NT.pdf
- Description:
- IC TXRX INVERT 5.5V 24DIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,650
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SN74ABT833NT from Texas Instruments is an 8-bit to 9-bit parity bus transceiver with integrated parity generator/checker, ERR flag register, and dual-directional data transfer capability. It operates at 4.5–5.5 V, supports –40°C to 85°C industrial temperature range, delivers ±32-mA/64-mA drive strength, and features open-collector ERR output for parity error detection in synchronous bus systems.
For engineers reviewing the SN74ABT833NT datasheet, SN74ABT833NT pinout, SN74ABT833NT application, or SN74ABT833NT equivalent, this device is selected for high-reliability data integrity verification in backplane interconnects, memory subsystems, and fault-tolerant computing architectures where real-time parity validation and registered error reporting are required.
Technical Context
The SN74ABT833NT implements a synchronous, clocked parity error flag register that latches ERR on the rising edge of CLK and clears on low pulse at CLR. Its BiCMOS EPIC-IIB architecture enables low ground bounce (<1 V VOLP) and high noise immunity while supporting true (non-inverted) and inverted parity modes via OEA/OEB control logic.
It provides bidirectional 8-bit data paths (A1–A8 ↔ B1–B8) plus dedicated PARITY and ERR terminals, with independent output-enable control (OEA, OEB) enabling three-state isolation. The device uses TTL-compatible input thresholds (VIH = 2 V, VIL = 0.8 V) and meets JEDEC JESD-17 latch-up immunity (>500 mA).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 4.5 V to 5.5 V - Ensures compatibility with standard 5-V TTL and CMOS logic rails. |
| Operating Temperature | –40°C to +85°C - Qualified for industrial-grade embedded and computing applications. |
| Output Drive | –32 mA IOH / 64 mA IOL - Supports heavy capacitive loads and fanout to multiple inputs without external buffers. |
| Propagation Delay | tPLH/tPHL ≤ 5.4 ns (A→B) - Enables high-speed bus operation up to ~100 MHz system timing margins. |
| ERR Output Type | Open-collector - Allows wired-OR configuration across multiple parity checkers on shared error bus. |
| Parity Mode Control | Inverted parity via OEA=OEB=L - Provides forced-error diagnostic mode for system-level fault injection testing. |
| ESD Protection | >2000 V HBM / >200 V MM - Meets MIL-STD-883 and machine-model requirements for robust board handling. |
Pinout & Package
SN74ABT833NT is supplied in a 24-pin plastic DIP (NT) package with 0.3-inch body width and through-hole mounting. Pin spacing is 0.1 inch, compatible with standard 0.1"-grid PCB layouts and socketing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OEA | Output Enable A | Active-low control enabling A-bus drivers; when high, A outputs enter high-impedance state. |
| OEB | Output Enable B | Active-low control enabling B-bus drivers; when high, B outputs enter high-impedance state. |
| CLK | Clock Input | Rising-edge-triggered latch for ERR flag register; synchronizes error reporting to system clock domain. |
| CLR | Clear Input | Asynchronous active-low reset of ERR register; ensures known initial error state at power-on or fault recovery. |
| ERR | Parity Error Flag | Open-collector output asserting low when parity mismatch detected on B-bus data + PARITY input. |
| PARITY | Generated Parity Bit | 9th-bit output reflecting odd parity of A-bus data; used as reference during B→A parity checking. |
| A1–A8 | A-Bus Data Inputs/Outputs | Bidirectional 8-bit port; transfers data to B-bus when OEA low, receives data from B-bus when OEB low. |
| B1–B8 | B-Bus Data Inputs/Outputs | Bidirectional 8-bit port; receives data from A-bus when OEA low, drives A-bus when OEB low with parity validation. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Parity Generator/Checker | Generates odd parity on A→B transfer and validates parity on B→A transfer using single-cycle logic. |
| Registered ERR Flag | ERR status captured synchronously on CLK↑ and held until cleared by CLR, enabling deterministic interrupt handling. |
| Inverted Parity Diagnostic Mode | When OEA=OEB=L, forces parity error condition-supports hardware-level fault simulation without software intervention. |
| High-Drive BiCMOS Outputs | –32 mA source / 64 mA sink capability eliminates need for external line drivers in dense bus environments. |
| Low Ground Bounce | VOLP < 1 V at VCC = 5 V - Reduces switching noise coupling into analog sections or adjacent signal lines. |
Applications
| Memory Subsystem Interconnect | Backplane Data Integrity |
|---|---|
Use Scenario: Bidirectional data transfer between CPU and DRAM controller with real-time parity verification on read/write cycles. IC Role / Device Role / Timing Role: SN74ABT833NT acts as parity-aware bus transceiver, generating parity during write and checking it during read, synchronized to memory clock. Use Value: Detects single-bit errors in memory data path before corruption propagates, enabling ECC fallback or retry logic. | Use Scenario: Parallel data transmission across multi-slot backplane where bit errors may occur due to crosstalk or impedance mismatch. IC Role / Device Role / Timing Role: SN74ABT833NT serves as per-slot parity validator, comparing transmitted and received 9-bit words on each slot's local bus. Use Value: Localized error detection reduces latency versus centralized CRC checking and isolates faulty slots without halting full backplane operation. |
| Fault-Tolerant Computing Node | Industrial PLC I/O Expansion |
Use Scenario: Dual-CPU redundancy architecture where parity-checked data must be exchanged between primary and backup processors. IC Role / Device Role / Timing Role: SN74ABT833NT mediates inter-processor bus with registered ERR flag enabling synchronized failover decision based on parity failure history. Use Value: Registered error flag prevents metastability-induced false positives during clock domain crossing between CPUs. | Use Scenario: Modular I/O chassis where fieldbus modules report sensor/actuator data over parallel bus with built-in integrity assurance. IC Role / Device Role / Timing Role: SN74ABT833NT interfaces module-local bus to chassis backplane, generating parity on module output and validating incoming command parity. Use Value: Eliminates need for software-based checksumming, reducing PLC scan cycle time and improving deterministic response. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar parity-aware bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74ABT823N | 8-bit non-parity transceiver; no PARITY/ERR/CLK/CLR functions; identical pinout except missing pins 10,11,12,13,22,23. | Lacks parity generation, checking, and error flag register - suitable only where data integrity is handled at higher protocol layer. | Select SN74ABT823N if parity is unnecessary and board layout rework to remove unused pins is acceptable. |
| SN74ACT833N | Same functionality and pinout; TTL-compatible inputs but ACT-series CMOS outputs (lower drive: –24 mA/24 mA); higher ICC at speed. | Lower drive strength limits trace length and fanout; requires tighter noise margin management in noisy industrial environments. | Choose SN74ACT833N only if existing design already uses ACT logic family and power budget allows reduced drive capability. |
Compared with SN74ABT833NT, SN74ABT823N omits all parity infrastructure and requires external error detection, while SN74ACT833N retains full functionality but trades off drive strength and noise immunity for lower static power - neither is pin-compatible nor drop-in replaceable without electrical and timing validation.
Availability
SN74ABT833NT is available at Aetrix Electronics and suitable for memory subsystem interconnects, backplane data integrity monitoring, and fault-tolerant computing nodes requiring stable component supply across extended product lifecycles.
Supply support for SN74ABT833NT 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 delivering analog, embedded processing, and logic solutions for industrial, automotive, and communications markets.
The SN74ABT833NT belongs to TI's ABT logic family, designed specifically for high-speed, high-drive, parity-enabled bus interfacing in mission-critical computing and control systems.
FAQ
What is the function of the CLR pin on the SN74ABT833NT?
The CLR (clear) pin on the SN74ABT833NT is an asynchronous active-low input that resets the internal parity error flag register. When pulled low, it forces the ERR output high regardless of current parity status, ensuring a known error state after power-up or fault recovery. This behavior is confirmed in the ERROR-FLAG FUNCTION TABLE and logic diagram of the official SCBS195C datasheet. The SN74ABT833NT requires only a brief low pulse on CLR to clear the register, and the pin must be held high during normal operation to preserve ERR state.
Does the SN74ABT833NT support both even and odd parity modes?
The SN74ABT833NT natively generates and checks odd parity, as stated in the functional description and verified in the FUNCTION TABLE where "Σ OF H's Odd" triggers PARITY = L and ERR = H during A→B transfer. Inverted parity mode (activated when OEA=OEB=L) forces an intentional parity error but does not change the underlying odd-parity logic - it is a diagnostic feature, not an even-parity mode. No documentation supports configurable even/odd selection; the SN74ABT833NT implements fixed odd-parity operation per its design specification.
What is the maximum clock frequency supported by the SN74ABT833NT for reliable ERR flag registration?
The SN74ABT833NT does not specify a maximum clock frequency; instead, timing is governed by minimum pulse width requirements. The datasheet mandates a minimum CLK high/low time of 3 ns (tw), implying a theoretical maximum toggle rate of ~167 MHz. However, reliable ERR registration depends on setup/hold timing: B or PARITY data must be stable ≥8.1 ns before CLK↑ (tsu) and ≥0 ns after (th). At 5 V and 25°C, propagation delays (tPHL/tPLH ≤5.4 ns) support system clock domains up to ~80 MHz with proper PCB layout and load management. This timing behavior is consistent across all SN74ABT833NT operating conditions.
Can the SN74ABT833NT be used in hot-swap applications?
The SN74ABT833NT is not characterized for hot-swap operation. Its absolute maximum ratings allow VCC from –0.5 V to 7 V and specify no Ioff current limit during partial power-up, unlike dedicated hot-swap ICs. The recommended practice is to tie OE inputs to VCC via pullup resistors during power sequencing to ensure high-impedance state at startup, as noted in the datasheet. While the device exhibits robust latch-up immunity (>500 mA) and ESD protection (>2000 V HBM), absence of controlled slew-rate outputs or rail-to-rail input tolerance means uncontrolled insertion into live backplanes risks bus contention or transient overstress. Use in hot-swap systems requires external protection circuitry and validation.
How does the SN74ABT833NT handle bus isolation when both OEA and OEB are high?
When both OEA and OEB are high, the SN74ABT833NT places all A1–A8 and B1–B8 I/O ports into high-impedance (Z) state, fully isolating the A and B buses. As confirmed in the FUNCTION TABLE, this condition results in "Isolation" mode with A and B outputs disabled and PARITY driven high. The ERR output remains in its last registered state (not forced high or low), preserving error history across isolation events. This behavior enables dynamic bus segmentation in multi-master systems, allowing one segment to operate while others are electrically disconnected - a key capability for modular system architectures using the SN74ABT833NT.
SN74ABT833NT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ABT
- Package/Case:
- 24-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Logic Type:
- Transceiver, Inverting
- Number of Elements:
- 1
- 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:
- Through Hole
- Supplier Device Package:
- 24-PDIP
SN74ABT833NT FAQ
1.How can I place an order for SN74ABT833NT through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74ABT833NT 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 SN74ABT833NT reliable?
The price and inventory of SN74ABT833NT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ABT833NT is usually 5 days.
3.What payment methods are accepted for SN74ABT833NT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74ABT833NT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74ABT833NT?
SN74ABT833NT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74ABT833NT 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 SN74ABT833NT?
For technical support, including SN74ABT833NT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ABT833NT requirements.
6.How does Aetrix verify that SN74ABT833NT is sourced from the original manufacturer or authorized distributors?
All SN74ABT833NT 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 SN74ABT833NT meets industry standards.
7.What is the process for return or replacement of SN74ABT833NT?
All SN74ABT833NT units undergo pre-shipment inspection (PSI). If there is an issue with SN74ABT833NT, 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 SN74ABT833NT part is unused and in its original packaging.
Return procedure for SN74ABT833NT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SN74ABT833NT Tags
-
SN74LVC1G17DBVR
Texas Instruments
-
SN74LVC1G07DCKR
Texas Instruments
-
SN74LVC1G17DCKR
Texas Instruments
-
SN74LVC1G07DBVR
Texas Instruments
-
SN74LVC1G125DCKR
Texas Instruments
-
SN74AHCT1G126DBVR
Texas Instruments
-
SN74LVC1G125DBVR
Texas Instruments
-
SN74AHCT1G125DBVR
Texas Instruments
-
SN74LVC2G17DBVR
Texas Instruments
-
SN74LVC2G07DCKR
Texas Instruments
-
SN74LVC1G34DCKR
Texas Instruments
-
SN74LVC2G17DCKR
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
