My Inquiry
My Account
Texas Instruments SN74ABT2952ADWR
- Part No.:
- SN74ABT2952ADWR
- Manufacturer:
- Texas Instruments
- Package:
- 24-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SN74ABT2952ADWR.pdf
- Description:
- IC TXRX NON-INVERT 5.5V 24SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,084
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SN74ABT2952ADWR from Texas Instruments is an octal bus transceiver and register with 3-state outputs, implementing two independent 8-bit back-to-back registers for bidirectional data flow between A and B buses. It operates at 5 V, supports 150 MHz clock frequency, delivers ±64 mA output drive, and features noninverting outputs with typical VOLP < 1 V - used in high-speed system bus isolation and data buffering in industrial control backplanes.
For engineers reviewing the SN74ABT2952ADWR datasheet, SN74ABT2952ADWR pinout, SN74ABT2952ADWR application, or SN74ABT2952ADWR equivalent, key selection criteria include bidirectional register timing (tPLH/tPHL ≤ 6.3 ns), 3-state enable/disable performance (tPZH/tPLZ ≤ 6.7 ns), thermal resistance (θJA = 81°C/W in DW package), and compatibility with 5-V TTL/CMOS logic interfaces.
Technical Context
The SN74ABT2952ADWR integrates dual 8-bit transparent latches synchronized to separate clock inputs (CLKAB/CLKBA) and controlled by dedicated clock-enable (CLKENAB/CLKENBA) and output-enable (OEAB/OEBA) signals. Each register captures data on the low-to-high clock transition when its corresponding clock-enable is low.
Its EPIC-II™ BiCMOS process enables high-speed operation with reduced power dissipation versus standard bipolar TTL, while maintaining TTL-compatible input thresholds (VIH = 2 V, VIL = 0.8 V) and robust 3-state output control that ensures high-impedance during power-up/down when OE is pulled up to VCC.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - compatible with standard 5-V logic rails and tolerant of supply ripple. |
| Max Clock Frequency | 150 MHz - supports high-throughput synchronous bus transfers in real-time systems. |
| Output Drive | IOL = 64 mA / IOH = –32 mA - sufficient to drive heavy capacitive loads or multiple TTL inputs without external buffers. |
| Propagation Delay | tPLH/tPHL ≤ 6.3 ns (CL = 50 pF) - enables sub-7-ns signal path timing in tightly constrained PCB layouts. |
| 3-State Enable Time | tPZH ≤ 5.7 ns - ensures fast bus arbitration and minimizes contention windows during direction switching. |
| Operating Temperature | –40°C to +85°C - qualified for commercial and industrial ambient environments without derating. |
| Package Thermal Resistance | θJA = 81°C/W (DW package) - defines maximum power dissipation limit under natural convection cooling. |
Pinout & Package
SN74ABT2952ADWR is housed in a 24-pin SOIC (DW) package with 300-mil body width, gull-wing leads, and RoHS-compliant NiPdAu plating. Pin 1 is located in Quadrant Q1 per tape-and-reel orientation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1–A8 | A-side data bus inputs/outputs | 8-bit bidirectional port connected to one system bus segment; driven high-impedance when OEAB is high. |
| B1–B8 | B-side data bus inputs/outputs | 8-bit bidirectional port connected to second system bus segment; driven high-impedance when OEBA is high. |
| CLKAB | A-to-B clock input | Triggers capture of A-bus data into A→B register on rising edge when CLKENAB is low. |
| CLKBA | B-to-A clock input | Triggers capture of B-bus data into B→A register on rising edge when CLKENBA is low. |
| CLKENAB | A-to-B clock enable | Active-low control enabling CLKAB functionality; when high, CLKAB is ignored and A→B register holds last value. |
| CLKENBA | B-to-A clock enable | Active-low control enabling CLKBA functionality; when high, CLKBA is ignored and B→A register holds last value. |
| OEAB | A-to-B output enable | Active-low control enabling A→B data transfer to B bus; when high, B1–B8 enter high-impedance state. |
| OEBA | B-to-A output enable | Active-low control enabling B→A data transfer to A bus; when high, A1–A8 enter high-impedance state. |
| VCC | Power supply | 5-V nominal supply connection; must be decoupled locally to suppress switching noise and ground bounce. |
| GND | Ground reference | Common return path for all I/O and internal logic; requires low-inductance connection to minimize VOLP. |
Key Features
| Feature | Design Value |
|---|---|
| Dual 8-bit back-to-back registers | Enables simultaneous, independent latching of data flowing in both directions without bus contention. |
| Noninverting outputs | Preserves signal polarity across both A and B ports, simplifying timing analysis and eliminating inversion logic. |
| Low output ground bounce (VOLP < 1 V) | Reduces noise coupling into adjacent signal lines and improves signal integrity in dense PCB layouts. |
| Latch-up immunity > 500 mA | Meets JESD17 requirements, ensuring robustness against transient overcurrent events in harsh environments. |
| ESD protection > 2000 V (HBM) | Provides handling safety during assembly and field service without requiring special ESD precautions. |
Applications
| Industrial Backplane Interface | Test Equipment Bus Isolation |
|---|---|
Use Scenario: Isolating CPU and peripheral modules on a modular PLC rack with hot-swap capability. IC Role / Device Role / Timing Role: Bidirectional register-based buffer synchronizing asynchronous module insertion/removal with system clock domain. Use Value: Prevents bus contention during hot-swap via independent OEAB/OEBA control and eliminates metastability with registered data paths. |
Use Scenario: Separating DUT interface logic from controller logic in automated test equipment (ATE) with multi-site parallel testing. IC Role / Device Role / Timing Role: High-speed 3-state transceiver registering stimulus/response data between FPGA controller and DUT pins. Use Value: Enables precise timing alignment (tPLH ≤ 6.3 ns) and prevents signal corruption during test vector transitions. |
| Legacy System Bus Extension | Real-Time Data Acquisition Buffer |
Use Scenario: Extending a 16-bit ISA or VME bus across a long PCB trace or interconnect cable with signal integrity preservation. IC Role / Device Role / Timing Role: Registered repeater re-timing and driving signals between bus segments using CLKAB/CLKBA synchronization. Use Value: Compensates for trace delay skew and restores signal margins with 64 mA drive strength and low VOLP. |
Use Scenario: Interfacing high-speed ADCs to microcontroller DMA engines in vibration monitoring systems. IC Role / Device Role / Timing Role: Synchronizing burst-mode ADC output words into MCU-accessible memory-mapped registers. Use Value: Eliminates FIFO logic by providing dual-latched storage with independent read/write clocks (CLKAB/CLKBA). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal bidirectional registered transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74ABT245DWR | Octal nonregistered transceiver; no internal clocked registers; only 3-state control via single OE. | Suitable for simple level-shifting or bus isolation where registration is not required. | Select when deterministic latency and clock-domain crossing are unnecessary; lower propagation delay (tPLH ≤ 4.2 ns) but no data retention. |
| SN74LVTH245ADW | 3.3-V LVTH logic family; lower drive (IOL = 32 mA); incompatible voltage range (3.0–3.6 V). | Designed for mixed-voltage 3.3-V/5-V system interfaces, not direct 5-V replacement. | Choose only if migrating to 3.3-V core logic; requires level translation for 5-V bus connection and cannot substitute without redesign. |
Compared with SN74ABT2952ADWR, SN74ABT245DWR offers faster raw throughput but lacks bidirectional registration, while SN74LVTH245ADW reduces power and noise at the cost of voltage incompatibility and halved drive strength - making SN74ABT2952ADWR uniquely suited for registered 5-V bus bridging with timing control.
Availability
SN74ABT2952ADWR is available at Aetrix Electronics and suitable for industrial backplane interfaces, automated test equipment, legacy bus extension, and real-time data acquisition systems requiring stable component supply, long-term lifecycle support, and verified 5-V TTL compatibility.
Supply support for SN74ABT2952ADWR 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 logic families and industrial-grade interface ICs.
The SN74ABT2952ADWR belongs to TI's ABT-series advanced bi-directional transceivers, designed specifically for high-speed, registered bus interfacing in industrial automation, test instrumentation, and legacy system upgrades.
FAQ
What is the maximum clock frequency supported by the SN74ABT2952ADWR?
The SN74ABT2952ADWR supports a maximum clock frequency of 150 MHz across its full operating temperature range (–40°C to +85°C), as specified in the timing requirements table of the official datasheet. This rating applies to both CLKAB and CLKBA inputs under recommended conditions (VCC = 4.5 V to 5.5 V, CL = 50 pF). The SN74ABT2952ADWR achieves this performance using TI's EPIC-II™ BiCMOS process, balancing speed and power efficiency.
Does the SN74ABT2952ADWR require external pull-up resistors on OE pins?
Yes - to ensure defined high-impedance states during power-up or power-down, OEAB and OEBA should each be tied to VCC through a pull-up resistor. The minimum resistor value depends on the current-sinking capability of the driving source; TI recommends evaluating based on the driver's IOH specification and desired rise time. This requirement is explicitly stated in the SN74ABT2952ADWR datasheet to prevent bus contention during supply ramping.
Can the SN74ABT2952ADWR operate with a 3.3-V supply?
No - the SN74ABT2952ADWR is rated exclusively for 4.5 V to 5.5 V operation. Its input thresholds (VIH = 2 V, VIL = 0.8 V), output drive characteristics, and internal BiCMOS structure are optimized for 5-V TTL/CMOS compatibility. Applying 3.3 V violates the recommended operating conditions and may result in unreliable logic levels, increased propagation delay, or functional failure. For 3.3-V systems, consider TI's LVTH or LVC series alternatives.
What is the thermal resistance (θJA) of the SN74ABT2952ADWR in its DW package?
The SN74ABT2952ADWR in the SOIC (DW) package has a junction-to-ambient thermal resistance (θJA) of 81°C/W under standard JEDEC test conditions. This value is critical for calculating maximum allowable power dissipation (Pmax = (TJmax – TA)/θJA) and must be used with the device's actual ICC consumption (up to 35 mA in active mode) to verify safe operation at the target ambient temperature. The θJA figure is confirmed in the Absolute Maximum Ratings section of the SN74ABT2952ADWR datasheet.
How does the SN74ABT2952ADWR handle bus contention during direction switching?
The SN74ABT2952ADWR avoids bus contention through independent, active-low output-enable controls (OEAB and OEBA) that place each port into high-impedance before the opposing port becomes active. Its dual-register architecture allows data to be latched and held during direction transitions, eliminating reliance on timing overlap. This behavior is reinforced by the requirement to tie OE pins to VCC via pull-ups - ensuring default high-Z states during power sequencing, which is a core design feature of the SN74ABT2952ADWR.
SN74ABT2952ADWR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ABT
- Package/Case:
- 24-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Logic Type:
- Transceiver, Non-Inverting
- Number of Elements:
- 1
- Number of Bits per Element:
- 8
- Input Type:
- -
- Output Type:
- 3-State
- 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:
- 24-SOIC
SN74ABT2952ADWR FAQ
1.How can I place an order for SN74ABT2952ADWR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74ABT2952ADWR 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 SN74ABT2952ADWR reliable?
The price and inventory of SN74ABT2952ADWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ABT2952ADWR is usually 5 days.
3.What payment methods are accepted for SN74ABT2952ADWR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74ABT2952ADWR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74ABT2952ADWR?
SN74ABT2952ADWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74ABT2952ADWR 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 SN74ABT2952ADWR?
For technical support, including SN74ABT2952ADWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ABT2952ADWR requirements.
6.How does Aetrix verify that SN74ABT2952ADWR is sourced from the original manufacturer or authorized distributors?
All SN74ABT2952ADWR 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 SN74ABT2952ADWR meets industry standards.
7.What is the process for return or replacement of SN74ABT2952ADWR?
All SN74ABT2952ADWR units undergo pre-shipment inspection (PSI). If there is an issue with SN74ABT2952ADWR, 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 SN74ABT2952ADWR part is unused and in its original packaging.
Return procedure for SN74ABT2952ADWR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SN74ABT2952ADWR 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…
