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Texas Instruments SN74ABT16952DL
- Part No.:
- SN74ABT16952DL
- Manufacturer:
- Texas Instruments
- Package:
- 56-BSSOP (0.295", 7.50mm Width)
- Datasheet:
-
SN74ABT16952DL.pdf
- Description:
- IC TXRX NON-INVERT 5.5V 56SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,503
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Product details
Overview
SN74ABT16952DL from Texas Instruments is a 16-bit registered transceiver with 3-state outputs, designed for bidirectional data buffering in high-speed bus applications. It features dual 8-bit register banks (A↔B), clock-enable control per direction, and high-drive outputs (–32 mA IOH / 64 mA IOL) operating at 4.5–5.5 V. Used in backplane interfaces and memory expansion subsystems requiring registered data flow and bus isolation.
For engineers reviewing the SN74ABT16952DL datasheet, SN74ABT16952DL pinout, SN74ABT16952DL application, or SN74ABT16952DL equivalent, key selection criteria include registered A/B port timing (tSU = 3.5 ns, tH = 1 ns), 3-state enable/disable delays (tPZL = 5.1 ns), thermal resistance (θJA = 74°C/W), and SSOP-56 package compatibility with legacy Widebus™ board layouts.
Technical Context
The SN74ABT16952DL implements two independent 8-bit D-type flip-flop banks-one for A-to-B and one for B-to-A data flow-each controlled by dedicated clock (CLKAB/CLKBA) and clock-enable (CLKENAB/CLKENBA) inputs. Data latching occurs on the low-to-high transition of the respective clock when its enable is low.
Output-enable (OEAB/OEBA) controls 3-state output drivers per port, with guaranteed high-impedance during power-up/down when OE is pulled up to VCC. The device uses EPIC-IIB BiCMOS technology to achieve low ground bounce (VOLP < 1 V) and latch-up immunity (>500 mA per JESD-17).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - supports standard 5-V TTL systems with ±10% tolerance margin. |
| Operating Temperature | –40°C to +85°C - qualified for industrial-grade embedded and computing applications. |
| Max Clock Frequency | 150 MHz - enables high-throughput data transfer in synchronous bus architectures. |
| Output Drive Strength | –32 mA IOH / 64 mA IOL - drives heavy capacitive loads and multiple TTL inputs without external buffers. |
| Input Setup/Hold Time | tSU = 3.5 ns / tH = 1 ns - defines minimum data stability window before/after clock edge for reliable registration. |
| Propagation Delay | tPLH/tPHL ≤ 4.6 ns - ensures sub-5-ns signal path latency for time-critical interconnects. |
| Thermal Resistance | θJA = 74°C/W (DL package) - informs thermal design margin for continuous operation at full drive. |
Pinout & Package
SN74ABT16952DL 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. Pin 1 is located at top-left corner (Q1 quadrant), verified per TI tape-and-reel specification.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OEAB, 2OEAB, 1OEBA, 2OEBA | Output Enable (active-low) | Controls 3-state output drivers for corresponding A/B port groups; must be pulled up for power-up safety. |
| 1CLKAB, 2CLKAB, 1CLKBA, 2CLKBA | Register clock input (rising-edge triggered) | Latches data from A→B or B→A on low-to-high transition when respective CLKEN is low. |
| 1CLKENAB, 2CLKENAB, 1CLKENBA, 2CLKENBA | Clock enable (active-low) | Gates clock propagation to registers; allows selective data capture without toggling clocks globally. |
| 1A1–1A8, 2A1–2A8, 1B1–1B8, 2B1–2B8 | Bidirectional data I/O terminals | Two independent 8-bit ports (A and B); each pin serves as input or output depending on OE and direction control. |
| VCC, GND (multiple pins) | Power distribution network | Distributed VCC/GND pins minimize switching noise and improve signal integrity in high-speed operation. |
Key Features
| Feature | Design Value |
|---|---|
| Flow-through pin architecture | Optimizes PCB layout by aligning A- and B-side signals across package width, reducing trace crossovers and layer count. |
| High-drive 3-state outputs | –32 mA source / 64 mA sink capability eliminates need for external bus drivers in dense backplane designs. |
| Distributed power/ground pins | Multiple VCC and GND pins placed throughout the 56-pin array suppress simultaneous switching noise (SSN) at >100 MHz. |
| EPIC-IIB BiCMOS process | Reduces dynamic power vs. pure bipolar while maintaining TTL-compatible voltage thresholds and speed. |
| Latch-up immunity | Exceeds 500 mA per JEDEC JESD-17 - ensures robustness in noisy industrial environments with supply transients. |
Applications
| Backplane Data Buffering | Memory Expansion Interface |
|---|---|
|
Use Scenario: Isolating and synchronizing data between CPU bus and peripheral expansion slots in modular industrial controllers. IC Role / Device Role / Timing Role: Registered transceiver providing clocked, direction-controlled data transfer between asynchronous bus domains with 3-state isolation. Use Value: Eliminates metastability risk via synchronous registration and prevents bus contention using independent OE control per port group. |
Use Scenario: Interfacing a 32-bit microprocessor to dual 16-bit SRAM banks with separate address/data multiplexing. IC Role / Device Role / Timing Role: Bidirectional registered buffer that captures and forwards address/data on rising clock edges, decoupling processor timing from memory access latency. Use Value: Enables deterministic setup/hold timing (3.5 ns / 1 ns) for reliable memory read/write cycles at 150 MHz system clock. |
| Legacy Bus Bridge | Test Equipment Data Acquisition |
|
Use Scenario: Adapting legacy 8-bit ISA-style peripherals to modern 16-bit local bus in diagnostic instrumentation. IC Role / Device Role / Timing Role: Two 8-bit registered transceivers operating in parallel to maintain byte-level alignment while adding synchronization and drive strength. Use Value: Maintains pin-compatible upgrade path with existing layouts while adding registration and 64-mA sink capability for long traces. |
Use Scenario: Capturing parallel digital waveforms from multi-channel ADCs into FPGA-based acquisition logic. IC Role / Device Role / Timing Role: High-speed registered interface that samples and holds incoming parallel data on precise clock edges before internal processing. Use Value: Reduces jitter-induced sampling errors via sub-5-ns propagation delay and tight 1-ns hold time specification. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar registered transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74ABT162245DL | Non-registered 16-bit transceiver; no internal flip-flops; lower drive (–24 mA / 48 mA); same DL package. | Suitable only where clocked registration is unnecessary; lacks setup/hold timing control for synchronous buses. | Select when cost or propagation delay (<3.5 ns) is prioritized over data synchronization capability. |
| SN74LVTH16952DL | Lower-voltage (3.3 V) variant; compatible with LVTH logic; reduced drive (–24 mA / 48 mA); same pinout and function. | Requires level-shifting for 5-V systems; not suitable for mixed-voltage backplanes without translation. | Choose for 3.3-V-only systems needing identical functionality and footprint with lower power consumption. |
Compared with SN74ABT16952DL, SN74ABT162245DL omits registration entirely-making it unsuitable for synchronous bus bridging-while SN74LVTH16952DL maintains pin-for-pin compatibility but operates exclusively at 3.3 V, requiring voltage translation in 5-V environments.
Availability
SN74ABT16952DL is available at Aetrix Electronics and suitable for backplane buffering, memory expansion interfaces, legacy bus bridging, and test equipment data acquisition requiring stable component supply and long-term industrial availability.
Supply support for SN74ABT16952DL 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 experience in high-reliability industrial and automotive ICs.
The SN74ABT16952DL belongs to TI's Widebus™ family of high-speed logic devices, engineered specifically for registered bus interfacing in demanding computing and industrial control systems.
FAQ
What is the maximum clock frequency supported by the SN74ABT16952DL?
The SN74ABT16952DL supports a maximum clock frequency of 150 MHz under recommended operating conditions (VCC = 5 V, TA = 25°C). This rating is guaranteed across the full industrial temperature range (–40°C to +85°C) and applies to both CLKAB and CLKBA inputs for reliable registered data transfer in high-speed bus applications.
Does the SN74ABT16952DL require external pull-up resistors on OE pins?
Yes - to ensure high-impedance outputs during power-up or power-down, OEAB and OEBA pins must be tied to VCC through external pull-up resistors. The minimum resistor value depends on the current-sinking capability of the driving logic; TI recommends verifying against the specific driver's IOH spec to avoid unintended activation.
Can the SN74ABT16952DL operate at 3.3 V?
No - the SN74ABT16952DL is specified only for 4.5 V to 5.5 V operation. Attempting to run it at 3.3 V violates recommended operating conditions and may result in unreliable output levels, increased propagation delay, or functional failure. For 3.3-V systems, consider the pin-compatible SN74LVTH16952DL instead.
How many independent register banks does the SN74ABT16952DL contain?
The SN74ABT16952DL contains four independent register banks: two for A-to-B direction (1CLKAB/1CLKENAB and 2CLKAB/2CLKENAB) and two for B-to-A direction (1CLKBA/1CLKENBA and 2CLKBA/2CLKENBA), enabling flexible 8-bit or 16-bit synchronous data flow with per-bank clock and enable control.
What is the thermal resistance (θJA) of the SN74ABT16952DL in its SSOP-DL package?
The SN74ABT16952DL has a junction-to-ambient thermal resistance (θJA) of 74°C/W in the DL package, measured per JEDEC JESD51 standards. This value assumes standard 2-layer PCB mounting with typical copper pour; actual thermal performance depends on board layout, airflow, and adjacent heat sources.
SN74ABT16952DL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ABT
- Package/Case:
- 56-BSSOP (0.295", 7.50mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- Logic Type:
- Transceiver, Non-Inverting
- Number of Elements:
- 2
- 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:
- 56-SSOP
SN74ABT16952DL FAQ
1.How can I place an order for SN74ABT16952DL through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74ABT16952DL 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 SN74ABT16952DL reliable?
The price and inventory of SN74ABT16952DL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ABT16952DL is usually 5 days.
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SN74ABT16952DL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74ABT16952DL 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 SN74ABT16952DL?
For technical support, including SN74ABT16952DL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ABT16952DL requirements.
6.How does Aetrix verify that SN74ABT16952DL is sourced from the original manufacturer or authorized distributors?
All SN74ABT16952DL 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 SN74ABT16952DL meets industry standards.
7.What is the process for return or replacement of SN74ABT16952DL?
All SN74ABT16952DL units undergo pre-shipment inspection (PSI). If there is an issue with SN74ABT16952DL, 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 SN74ABT16952DL part is unused and in its original packaging.
Return procedure for SN74ABT16952DL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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