My Inquiry
My Account
Texas Instruments SN74ABT853NT
- Part No.:
- SN74ABT853NT
- Manufacturer:
- Texas Instruments
- Package:
- 24-DIP (0.300", 7.62mm)
- Datasheet:
-
SN74ABT853NT.pdf
- Description:
- IC TXRX NON-INVERT 5.5V 24DIP
- Quantity:
- Payment:
- Shipping:
Inventory:2,118
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SN74ABT853NT from Texas Instruments is an 8-bit to 9-bit parity bus transceiver in a 24-pin plastic DIP (NT) package, designed for bidirectional data communication between parallel buses with real-time odd-parity generation and error detection. It features high-drive outputs (−32 mA IOH, 64 mA IOL), latch-enabled parity-error flag storage, and operates over −40°C to 85°C at 4.5–5.5 V supply. Used in industrial backplane and legacy computing systems requiring fault-tolerant data integrity.
For engineers reviewing the SN74ABT853NT datasheet, SN74ABT853NT pinout, SN74ABT853NT application, or SN74ABT853NT equivalent, key selection considerations include its dual-bus direction control (OEA/OEB), open-collector ERR output with latch/clear logic, PARITY generation during A→B transfer, and compatibility with TTL-level signaling in mixed-logic systems.
Technical Context
The SN74ABT853NT implements a stateful parity-check architecture: when data flows from A to B, it generates odd parity on the PARITY pin; when data flows from B to A (with PARITY input), it compares received parity and asserts ERR if mismatched. The ERR flag can be sampled, latched (via LE), or cleared (via CLR), enabling diagnostic logging without host CPU intervention.
Its EPIC-II™ BiCMOS process delivers low ground bounce (<1 V VOLP at 5 V), ESD robustness (>2 kV HBM), and latch-up immunity (>500 mA). Power-up/power-down high-impedance behavior below 2.1 V VCC ensures bus isolation during sequencing, while pullup on OE above 2.1 V guarantees safe default state.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - compatible with standard 5 V TTL/CMOS systems; not 3.3 V tolerant. |
| Operating Temperature | −40°C to +85°C - qualified for commercial/industrial environments, not extended military range. |
| Output Drive | −32 mA IOH / +64 mA IOL - drives heavy capacitive loads and multiple TTL inputs without external buffers. |
| Propagation Delay | 1.2–6.4 ns (A↔B), 2.1–13.3 ns (A→PARITY) - supports high-speed synchronous bus transfers up to ~100 MHz system clock domains. |
| Parity Function | Odd-parity generation & checking - detects single-bit errors on 8-bit data paths; ERR is open-collector for wired-OR diagnostics. |
| Input Clamp Current | −18 mA - protects against negative transients on control/data lines per MIL-STD-883 Method 3015. |
| Power-Up State | High-impedance below 2.1 V VCC - prevents bus contention during power ramp; OE pullup required above threshold. |
Pinout & Package
SN74ABT853NT uses a 24-pin plastic dual in-line package (PDIP-NT), 0.600″ wide, with 0.1″ lead pitch. Pin 1 is bottom-left corner (notch-left orientation).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OEA) | Output Enable A | Active-low control enabling A-bus drivers; when high, A outputs enter high-Z. |
| 2–9 (A1–A8) | A-Bus Data Inputs/Outputs | Bidirectional I/O ports for 8-bit source/sink; true (non-inverted) data path. |
| 10 (ERR) | Parity-Error Flag | Open-collector output asserting low on parity mismatch; requires external pullup for logic-high. |
| 11 (CLR) | Clear Input | Active-low asynchronous reset of internal ERR latch; clears stored error flag immediately. |
| 12 (GND) | Ground Reference | Primary signal and power return; must be low-inductance connection for noise-sensitive parity logic. |
| 13 (VCC) | Supply Voltage | +5 V power rail; decoupling capacitor (0.1 µF ceramic) required within 1 cm of pin. |
| 14–21 (B1–B8) | B-Bus Data Inputs/Outputs | Bidirectional I/O ports for 8-bit destination/source; true data path synchronized with OEB. |
| 22 (PARITY) | Parity Output/Input | Generated odd parity bit during A→B transfer; used as parity check input during B→A transfer. |
| 23 (OEB) | Output Enable B | Active-low control enabling B-bus drivers; independent of OEA for asymmetric bus control. |
| 24 (LE) | Latch Enable | Edge-triggered strobe capturing current ERR state into internal register for diagnostic readback. |
Key Features
| Feature | Design Value |
|---|---|
| State-of-the-art EPIC-II™ BiCMOS | Reduces dynamic power vs. pure bipolar while retaining TTL-compatible drive strength and speed. |
| Parity-error latch with CLR/LE | Enables autonomous error capture and clearing without continuous host polling-critical for interrupt-driven diagnostics. |
| Inverted-parity mode (OEA=OEB=L) | Forces ERR assertion regardless of data, providing deterministic test mode for system-level parity path validation. |
| High-impedance during power sequencing | Prevents back-driving or contention on A/B buses when VCC is <2.1 V-eliminates need for external bus switches in hot-swap designs. |
| TTL-compatible input thresholds | VIH = 2.0 V, VIL = 0.8 V - interoperable with legacy 5 V logic families without level-shifting. |
Applications
| Industrial Backplane Communication | Legacy Computer Memory Subsystem |
|---|---|
|
Use Scenario: Bidirectional data transfer between CPU and peripheral cards across a 24-bit ISA-style backplane with parity protection. IC Role / Device Role / Timing Role: SN74ABT853NT acts as the parity-aware bus transceiver, generating parity on write cycles and verifying it on read cycles while isolating bus segments during idle states. Use Value: Detects single-bit memory or address bus corruption in real time, triggering NMI interrupts via ERR signal-enabling field-replaceable module diagnostics without software overhead. |
Use Scenario: Interfacing 8-bit microprocessor data bus to 9-bit wide memory modules with parity bits stored separately. IC Role / Device Role / Timing Role: SN74ABT853NT serves as the parity interface between processor and memory controller, inserting parity during store operations and validating it during load operations. Use Value: Ensures ECC-capable memory subsystems maintain data integrity across temperature cycling and voltage droop, meeting MIL-STD-883 reliability requirements for avionics upgrades. |
| Test Equipment Data Acquisition Bus | Programmable Logic Controller I/O Expansion |
|
Use Scenario: Aggregating sensor data from multiple 8-bit ADC channels onto a central bus with parity-checked transmission. IC Role / Device Role / Timing Role: SN74ABT853NT functions as a parity-generating multiplexer, combining channel data and computing cumulative odd parity before forwarding to host controller. Use Value: Reduces false alarms in safety-critical monitoring by eliminating undetected bit flips caused by EMI in industrial plant environments. |
Use Scenario: Extending discrete I/O capacity of PLC main unit using daisy-chained expansion modules with parity-protected command/response protocol. IC Role / Device Role / Timing Role: SN74ABT853NT provides isolated, parity-verified data path between master and slave modules, with ERR flag used to halt sequence on detected corruption. Use Value: Enables deterministic fault containment-prevents cascading logic errors in factory automation sequences by halting execution on first parity violation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit parity transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74ABT824N | 8-bit non-parity transceiver; no PARITY/ERR/LE/CLR logic; only OEA/OEB control. | Suitable for basic bus isolation where parity checking is handled externally or omitted. | Select SN74ABT824N only if parity functionality is unnecessary and board space or BOM count reduction is prioritized. |
| SN74ACT853N | Same pinout/function but ACT-family: lower drive (−24 mA IOH, 48 mA IOL), higher speed (tPLH/tPHL ≤ 4.5 ns), 4.5–5.5 V supply. | Better suited for high-frequency, low-noise systems where reduced ground bounce is critical. | Choose SN74ACT853N when system timing margin is tight and lower power consumption is acceptable despite reduced drive capability. |
Compared with SN74ABT853NT, SN74ABT824N omits parity logic entirely-requiring external error detection-and SN74ACT853N trades drive strength for speed and lower noise, making it preferable only in noise-sensitive, high-clock-rate implementations where 64 mA IOL is not required.
Availability
SN74ABT853NT is available at Aetrix Electronics and suitable for industrial backplane communication, legacy computer memory subsystems, and programmable logic controller I/O expansion requiring stable component supply across long-lifecycle programs.
Supply support for SN74ABT853NT 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 founded in 1930, specializing in analog, embedded processing, and logic solutions with broad industrial, automotive, and aerospace qualification.
The SN74ABT853NT belongs to TI's ABT-series advanced bi-directional transceivers, engineered for robust 5 V TTL-system interfacing with integrated parity checking-targeting legacy infrastructure upgrades and long-lifecycle industrial control.
FAQ
What is the function of the PARITY pin on the SN74ABT853NT?
The PARITY pin on the SN74ABT853NT serves a dual role: during A→B data transfer (OEA low, OEB high), it outputs odd parity computed across A1–A8; during B→A transfer (OEB low, OEA high), it accepts the corresponding parity bit from the B bus for comparison. This enables real-time single-bit error detection without external logic, and the resulting ERR flag reflects match/mismatch status.
Can the SN74ABT853NT operate at 3.3 V supply voltage?
No, the SN74ABT853NT is specified only for 4.5 V to 5.5 V operation per its recommended operating conditions. Applying 3.3 V violates the minimum VCC requirement and will result in undefined logic levels, degraded noise margins, and potential failure to meet timing or drive specifications. For 3.3 V systems, consider TI's LVT or ALVC series alternatives.
How does the ERR output behave when both OEA and OEB are high?
When both OEA and OEB are high, the SN74ABT853NT enters isolation mode: all A and B I/O pins go high-impedance, and ERR assumes a high-impedance state (not driven). In this configuration, ERR cannot indicate parity status-it is only active and meaningful when either OEA or OEB is low to enable data flow and parity evaluation.
Is the SN74ABT853NT RoHS compliant?
Yes, the SN74ABT853NT is RoHS compliant with Pb-Free (RoHS) lead finish and CU NIPDAU termination, as confirmed in TI's official packaging addendum. It meets EU Directive 2011/65/EU requirements and contains no restricted substances above threshold limits, including lead ≤ 0.1% by weight in homogeneous materials.
What is the purpose of the inverted-parity mode (OEA=OEB=L) in the SN74ABT853NT?
When both OEA and OEB are low, the SN74ABT853NT forces ERR low regardless of input data-a deliberate "inverted parity" condition. This provides a hardware-level test mode to verify the entire ERR signal path (latch, clear, output driver, external pullup) without relying on specific data patterns, simplifying system-level diagnostic firmware and validation.
SN74ABT853NT 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, Non-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
SN74ABT853NT FAQ
1.How can I place an order for SN74ABT853NT through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74ABT853NT 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 SN74ABT853NT reliable?
The price and inventory of SN74ABT853NT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ABT853NT is usually 5 days.
3.What payment methods are accepted for SN74ABT853NT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74ABT853NT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74ABT853NT?
SN74ABT853NT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74ABT853NT 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 SN74ABT853NT?
For technical support, including SN74ABT853NT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ABT853NT requirements.
6.How does Aetrix verify that SN74ABT853NT is sourced from the original manufacturer or authorized distributors?
All SN74ABT853NT 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 SN74ABT853NT meets industry standards.
7.What is the process for return or replacement of SN74ABT853NT?
All SN74ABT853NT units undergo pre-shipment inspection (PSI). If there is an issue with SN74ABT853NT, 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 SN74ABT853NT part is unused and in its original packaging.
Return procedure for SN74ABT853NT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SN74ABT853NT 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…
