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Texas Instruments SN74ABT652ADW
- Part No.:
- SN74ABT652ADW
- Manufacturer:
- Texas Instruments
- Package:
- 24-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SN74ABT652ADW.pdf
- Description:
- IC TXRX NON-INVERT 5.5V 24SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:270
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Product details
Overview
SN74ABT652ADW from Texas Instruments is an octal registered transceiver with 3-state outputs, designed for bidirectional data bus management between two 8-bit buses (A and B). It integrates D-type flip-flops, dual clock inputs (CLKAB/CLKBA), dual select controls (SAB/SBA), and independent output enables (OEAB/OEBA), supporting real-time or stored-data transfer at up to 125 MHz. It operates from 4.5 V to 5.5 V and is rated for –40°C to 85°C industrial temperature range.
For engineers reviewing the SN74ABT652ADW datasheet, SN74ABT652ADW pinout, SN74ABT652ADW application, or SN74ABT652ADW equivalent, key selection considerations include its 24-pin SOIC (DW) package, high-drive capability (–32 mA IOH / 64 mA IOL), latch-up immunity (>500 mA), ESD protection (>2000 V HBM), and support for glitch-free multiplexed bus control in industrial computing and backplane interfaces.
Technical Context
The SN74ABT652ADW implements a dual-path registered transceiver architecture: each direction (A↔B) has independent clock, select, and enable logic, enabling simultaneous or staggered storage and transfer. Its EPIC-IIB BiCMOS process delivers low ground bounce (<1 V VOLP) and reduced power dissipation versus standard TTL.
Real-time transfer occurs when SAB/SBA = L, while stored-data transfer requires SAB/SBA = H and valid clock edges; the select-control circuitry eliminates decoding glitches during mode transitions. Data is latched on low-to-high clock transitions regardless of OE or S state, and outputs enter high-impedance when OEAB or OEBA is high.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - Ensures compatibility with 5-V TTL and mixed-voltage systems without level-shifting. |
| Max Clock Frequency | 125 MHz - Supports high-speed synchronous bus arbitration in industrial controllers and data acquisition systems. |
| Output Drive | –32 mA IOH / 64 mA IOL - Drives heavy capacitive loads (e.g., long traces, multiple inputs) without external buffers. |
| Propagation Delay | tPLH/tPHL ≤ 5.6 ns (CLK→B/A) - Enables sub-8 ns cycle timing margins in 125-MHz bus systems. |
| ESD Protection | >2000 V HBM - Meets MIL-STD-883 Class 3015, reducing handling sensitivity in manufacturing and field service. |
| Latch-Up Immunity | >500 mA per JESD-17 - Prevents destructive latch-up during voltage transients or hot-insertion events. |
| Operating Temperature | –40°C to +85°C - Qualified for industrial-grade embedded systems including PLCs and motor drives. |
Pinout & Package
SN74ABT652ADW uses a 24-pin SOIC (DW) package with 300-mil body width, JEDEC MS-013 compliant, and RoHS-compliant NiPdAu lead finish. Pin 1 is located at the top-left corner (quadrant Q1) with beveled edge marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2 | CLKAB, SAB | Active-high clock and select for A→B transfer; SAB = L enables real-time A-to-B path. |
| 3, 23 | OEAB, OEBA | Independent 3-state enables: OEAB = L enables A→B outputs; OEBA = L enables B→A outputs. |
| 4–11 | A1–A8 | 8-bit A-bus I/O port - bidirectional data lines connected to local processor or memory bus. |
| 13–20 | B1–B8 | 8-bit B-bus I/O port - connects to peripheral, expansion, or secondary controller bus. |
| 12, 21 | GND, VCC | Power pins - require local 0.1 µF ceramic decoupling; VCC must be stable within ±5%. |
| 22, 24 | SBA, CLKBA | Select and clock for B→A transfer; SBA = L enables real-time B-to-A path. |
| NC (pins 14, 15, 16, 17) | No internal connection | Not bonded; must remain unconnected - no pull-up/down or routing required. |
Key Features
| Feature | Design Value |
|---|---|
| Glitch-free select control | Eliminates metastability during SAB/SBA transitions by decoupling clock and select logic - ensures deterministic bus state during mode switching. |
| High-impedance power-up default | OEBA tied to VCC and OEAB tied to GND via external resistors guarantees Hi-Z outputs during power ramp - prevents bus contention at startup. |
| Dual-register storage | Independent CLKAB/CLKBA allow asynchronous capture of A- and B-bus data into separate 8-bit registers - supports ping-pong buffering and time-stamped logging. |
| BiCMOS EPIC-IIB process | Reduces dynamic power vs. bipolar TTL while retaining drive strength - typical ICC = 30 mA at full toggle, enabling dense bus interface designs. |
| Robust bus driving | 64-mA sink capability handles 10+ TTL loads or 50-pF trace capacitance at full speed - eliminates need for external line drivers in mid-range systems. |
Applications
| Industrial Backplane Interface | Programmable Logic Controller (PLC) I/O Expansion |
|---|---|
Use Scenario: Interfacing a main CPU bus to modular I/O carrier boards across a 20-cm backplane with 50-pF per-line capacitance. IC Role / Device Role / Timing Role: Registered transceiver managing bidirectional data flow between CPU and remote I/O modules, using stored-data mode for deterministic scan-cycle updates. Use Value: Eliminates timing skew between A/B ports via synchronized clocks and provides 64-mA drive to overcome backplane losses without repeaters. | Use Scenario: Adding isolated analog input modules to a PLC rack where real-time sensor data must coexist with buffered configuration writes. IC Role / Device Role / Timing Role: Bus multiplexer that routes either live ADC readings (real-time mode) or pre-validated calibration tables (stored mode) to the CPU bus. Use Value: Select-control glitch immunity prevents spurious data corruption during mode switches triggered by ladder logic scans. |
| Test Equipment Digital Pattern Generator | Legacy System Bus Bridge |
Use Scenario: Generating synchronized 8-bit stimulus patterns onto DUT digital inputs while capturing response data on same bus lines. IC Role / Device Role / Timing Role: Bidirectional registered buffer enabling simultaneous pattern output and response sampling using time-multiplexed A/B ports. Use Value: Dual-clock capability (CLKAB/CLKBA) allows independent timing of stimulus launch and response capture with sub-5-ns setup/hold margins. | Use Scenario: Connecting a modern microcontroller (5-V tolerant) to a legacy ISA-style 8-bit data bus with strict timing and loading requirements. IC Role / Device Role / Timing Role: Level- and timing-transparent bridge providing registered handshaking, drive reinforcement, and bus isolation. Use Value: High-drive outputs meet legacy bus fan-out specs; 3-state enables support shared-bus arbitration with other ISA peripherals. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal registered transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74ABT652DBR | Identical logic and timing, but in 24-pin SSOP (DB) package with 2000-piece tape-and-reel packaging. | Preferred for automated SMT assembly; smaller footprint (5.3 mm × 7.2 mm vs. 7.5 mm × 15.4 mm) but lower thermal resistance (θJA = 104°C/W). | Select SN74ABT652DBR for high-volume production with pick-and-place; choose SN74ABT652ADW for prototyping, manual soldering, or legacy board compatibility requiring SOIC. |
| SN74LVT652DBR | 3.3-V only operation (2.7–3.6 V), lower drive (–32 mA / 64 mA), and faster max frequency (200 MHz), but lacks 5-V tolerance and military temp range. | Suitable for 3.3-V-only systems like FPGA-based test gear; not interoperable with 5-V buses without level translation. | Choose SN74LVT652DBR only in pure 3.3-V designs requiring higher speed; SN74ABT652ADW remains mandatory for 5-V industrial environments or mixed-voltage backplanes. |
Compared with SN74ABT652DBR and SN74LVT652DBR, the SN74ABT652ADW uniquely combines 5-V operation, industrial temperature range, SOIC package convenience, and proven robustness in electrically noisy environments-making it the default choice for retrofit, repair, and new industrial hardware where reliability trumps miniaturization.
Availability
SN74ABT652ADW is available at Aetrix Electronics and suitable for industrial backplane interfaces, PLC I/O expansion, automated test equipment, and legacy system bus bridging requiring stable component supply across extended product lifecycles.
Supply support for SN74ABT652ADW 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 industrial, automotive, and communications markets.
The SN74ABT652ADW belongs to TI's ABT logic family, engineered for high-speed, low-noise 5-V bus interfacing in mission-critical industrial systems where signal integrity and latch-up immunity are non-negotiable.
FAQ
What is the maximum clock frequency supported by the SN74ABT652ADW?
The SN74ABT652ADW supports a maximum clock frequency of 125 MHz under recommended operating conditions (VCC = 5 V, TA = 25°C). This is confirmed in the timing requirements table of the official datasheet (SCBS072F, p.8), where fclock min/max is specified as 0–125 MHz for both SN54ABT652A and SN74ABT652A variants. Real-world operation at this rate requires controlled impedance routing and proper decoupling.
How does the SN74ABT652ADW handle power-up sequencing to avoid bus contention?
The SN74ABT652ADW avoids bus contention at power-up by requiring OEBA to be tied to VCC via a pull-up resistor and OEAB to GND via a pull-down resistor. This forces both output-enable paths into high-impedance before internal logic stabilizes. The minimum resistor values depend on driver current-sinking (B→A) and sourcing (A→B) capabilities, as detailed in the functional description (p.2) of the SN74ABT652ADW datasheet.
Can the SN74ABT652ADW operate with a 3.3-V supply?
No, the SN74ABT652ADW is not rated for 3.3-V operation. Its recommended supply voltage range is strictly 4.5 V to 5.5 V (p.6, "Recommended Operating Conditions"). Attempting 3.3-V operation will result in undefined logic states, insufficient noise margin, and potential failure to meet timing specifications - use SN74LVT652 for 3.3-V systems instead.
What is the thermal resistance (θJA) of the SN74ABT652ADW in its SOIC (DW) package?
The junction-to-ambient thermal resistance (θJA) for the SN74ABT652ADW in the SOIC (DW) package is 81°C/W, as specified in the Absolute Maximum Ratings table (p.6) of the datasheet. This value assumes standard JEDEC 2-layer board conditions and is critical for calculating maximum allowable power dissipation in enclosed industrial enclosures.
Does the SN74ABT652ADW support hot-swap or live-insertion?
The SN74ABT652ADW features robust latch-up immunity (>500 mA per JESD-17) and high ESD protection (>2000 V HBM), making it suitable for controlled hot-swap applications. However, it lacks explicit hot-swap biasing circuitry; safe insertion requires external current-limiting and sequencing - e.g., staggered VCC/OE ramping - as outlined in TI application report SCBA012.
SN74ABT652ADW Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ABT
- Package/Case:
- 24-SOIC (0.295", 7.50mm Width)
- Packaging:
- Bulk
- 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
SN74ABT652ADW FAQ
1.How can I place an order for SN74ABT652ADW through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74ABT652ADW 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 SN74ABT652ADW reliable?
The price and inventory of SN74ABT652ADW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ABT652ADW is usually 5 days.
3.What payment methods are accepted for SN74ABT652ADW?
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4.How is shipping managed for SN74ABT652ADW?
SN74ABT652ADW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74ABT652ADW 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 SN74ABT652ADW?
For technical support, including SN74ABT652ADW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ABT652ADW requirements.
6.How does Aetrix verify that SN74ABT652ADW is sourced from the original manufacturer or authorized distributors?
All SN74ABT652ADW 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 SN74ABT652ADW meets industry standards.
7.What is the process for return or replacement of SN74ABT652ADW?
All SN74ABT652ADW units undergo pre-shipment inspection (PSI). If there is an issue with SN74ABT652ADW, 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 SN74ABT652ADW part is unused and in its original packaging.
Return procedure for SN74ABT652ADW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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