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NXP Semiconductors 74ABT652ADB,112
- Part No.:
- 74ABT652ADB,112
- Manufacturer:
- NXP Semiconductors
- Package:
- 24-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
74ABT652ADB,112.pdf
- Description:
- IC TXRX NON-INVERT 5.5V 24SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,729
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Product details
Overview
74ABT652ADB from NXP Semiconductors is an octal non-inverting bus transceiver/register with dual 3-state outputs, independent A/B clocking (CPAB/CPBA), and bidirectional bus management via OEAB/OEBA and SAB/SBA controls. It operates from 4.5 V to 5.5 V, delivers ±32 mA/±64 mA output drive, and supports real-time or registered data transfer across two 8-bit buses in industrial temperature range (−40 °C to +85 °C).
For engineers reviewing the 74ABT652ADB datasheet, 74ABT652ADB pinout, 74ABT652ADB application, or 74ABT652ADB equivalent, this device enables flexible multiplexed bus interfacing in backplane, memory expansion, and protocol-agnostic data routing where simultaneous storage and live transfer are required.
Technical Context
The 74ABT652ADB integrates eight D-type flip-flops per bus side, enabling independent latching of A- or B-side data on rising clock edges. Its BiCMOS architecture delivers high-speed propagation (tPLH/tPHL ≤ 5.6 ns) while maintaining low static current (ICC ≤ 250 µA) and robust latch-up immunity (>500 mA per JESD78B Class II).
Bus directionality and output state are controlled by four dedicated pins: OEAB/OEBA (active-low 3-state enable) and SAB/SBA (register select). Simultaneous clocking is permitted only when both select inputs are LOW; otherwise, clocks must be staggered to avoid register contention.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply voltage | 4.5 V to 5.5 V - Ensures compatibility with standard 5 V TTL/CMOS logic rails and stable operation under industrial supply variation. |
| Output drive | +64 mA / −32 mA - Supports heavy capacitive loads and fan-out to multiple downstream inputs without external buffering. |
| Max frequency | 125 MHz (−40 °C to +85 °C) - Enables high-throughput data routing in real-time control and instrumentation systems. |
| Propagation delay | tPLH/tPHL ≤ 5.6 ns (clock-to-output), tPZH/tPZL ≤ 8.5 ns (enable-to-output) - Guarantees sub-10 ns timing margins for synchronous bus arbitration. |
| ESD protection | HBM > 2000 V, MM > 200 V - Allows safe live insertion/extraction in field-serviceable backplane and modular chassis designs. |
| Operating temperature | −40 °C to +85 °C - Certified for use in industrial automation, telecom infrastructure, and embedded computing environments. |
| Logic family | ABT (Advanced BiCMOS Technology) - Combines bipolar speed with CMOS low power, achieving <250 µA ICC at 5.5 V with full I/O activity. |
Pinout & Package
74ABT652ADB uses the SSOP24 package (SOT340-1): plastic shrink small outline, 24 leads, 5.3 mm body width, 0.65 mm lead pitch. Pin 1 is marked with a notch or dot; pin numbering follows standard counter-clockwise sequence from top-left corner.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 CPAB | A-to-B clock input | Rising-edge-triggered clock for latching A-bus data into B-side registers; enables stored-data transfer from A to B. |
| 2 SAB | A-to-B select input | Active-HIGH control that enables real-time A→B bus transfer when OEAB is LOW and SAB is HIGH. |
| 3 OEAB | A-to-B output enable | Active-LOW signal enabling/disabling B-side outputs; determines directionality and isolation of A→B path. |
| 4–11 A0–A7 | A-side bidirectional I/O | 8-bit data interface for A bus; functions as input during register load, output during transceiver mode. |
| 12 GND | Ground reference | Primary 0 V return for all internal logic and output drivers; requires low-impedance PCB connection. |
| 13–20 B0–B7 | B-side bidirectional I/O | 8-bit data interface for B bus; mirrors A-side behavior with independent clocking and control. |
| 21 OEBA | B-to-A output enable | Active-LOW signal enabling/disabling A-side outputs; controls B→A data flow and isolation. |
| 22 SBA | B-to-A select input | Active-HIGH control enabling real-time B→A transfer when OEBA is LOW and SBA is HIGH. |
| 23 CPBA | B-to-A clock input | Rising-edge-triggered clock for latching B-bus data into A-side registers; enables stored-data transfer from B to A. |
| 24 VCC | Positive supply | 5 V nominal power rail; decoupling capacitor (0.1 µF ceramic) required within 5 mm of pin for noise suppression. |
Key Features
| Feature | Design Value |
|---|---|
| Independent A/B registers | Enables concurrent capture of data from both buses without cross-contamination, supporting time-stamped dual-source logging. |
| Multiplexed real-time + stored data | Allows simultaneous live bus pass-through and register-based data staging-critical for glitch-free protocol bridging and FIFO emulation. |
| Power-up 3-state and reset | Guarantees high-impedance outputs and deterministic register state at power-on, eliminating bus contention during system boot. |
| Live insertion/extraction support | Validated HBM ESD >2000 V and robust clamping allow hot-swap capability in modular rack systems without system shutdown. |
| Latch-up immunity | Exceeds 500 mA per JESD78B Class II, ensuring resilience against transient overcurrent events in noisy industrial environments. |
Applications
| Backplane Data Routing | Memory Expansion Interface |
|---|---|
|
Use Scenario: Interfacing multiple CPU modules to shared SRAM or Flash banks across a 16-bit parallel backplane. IC Role / Device Role / Timing Role: Bidirectional transceiver/register managing address/data multiplexing and timing alignment between mismatched clock domains. Use Value: Eliminates need for separate clock-domain crossing logic by storing data on one side while transferring real-time signals on the other, reducing PCB layer count. |
Use Scenario: Expanding local memory capacity in microcontroller-based PLCs using external 8-bit SRAM chips. IC Role / Device Role / Timing Role: Octal register buffering address lines and data bus, synchronizing burst reads/writes with MCU timing constraints. Use Value: Provides ±64 mA drive strength to meet SRAM setup/hold requirements across 10+ cm traces, avoiding signal integrity degradation. |
| Industrial Protocol Bridge | Test Equipment Bus Controller |
|
Use Scenario: Converting between legacy parallel control bus (e.g., GPIB-like) and modern microcontroller GPIO interfaces. IC Role / Device Role / Timing Role: Real-time transceiver for command streaming plus register storage for status feedback packets awaiting acknowledgment. Use Value: Enables deterministic latency control: 5.6 ns max propagation ensures sub-10 ns response window for time-critical motion control loops. |
Use Scenario: Managing stimulus/response sequencing in automated test equipment with multi-channel digital I/O cards. IC Role / Device Role / Timing Role: Register-controlled data staging for pattern generation and result capture, synchronized to system master clock. Use Value: Power-up 3-state prevents spurious signals during card insertion; latch-up immunity protects against ESD events during probe contact. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal transceiver/register applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 74ABT652APW | TSSOP24 package (4.4 mm width, 0.65 mm pitch); identical electrical specs and pinout. | Better suited for space-constrained PCBs requiring finer pitch and lower profile than SSOP24. | Select 74ABT652APW when board area is limited and reflow compatibility with fine-pitch processes is required. |
| 74ABT652AD | SO24 package (7.5 mm width, 1.27 mm pitch); same functionality and timing, but larger footprint and higher thermal resistance. | Preferred for through-hole prototyping, manual soldering, or legacy board designs with SOIC footprints. | Choose 74ABT652AD for ease of hand assembly or compatibility with existing SO24 layout templates. |
Compared with 74ABT652ADB, the 74ABT652APW offers identical performance in a smaller TSSOP24 package for high-density layouts, while the 74ABT652AD provides mechanical robustness and thermal margin in SO24-enabling selection based on assembly method, board space, and thermal budget rather than functional trade-offs.
Availability
74ABT652ADB is available at Aetrix Electronics and suitable for industrial backplane routing, memory expansion interfaces, and protocol bridge designs requiring stable component supply across extended product lifecycles.
Supply support for 74ABT652ADB 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
NXP Semiconductors is a global semiconductor company headquartered in Eindhoven, Netherlands, specializing in secure connectivity solutions for automotive, industrial, and IoT applications.
The 74ABT652ADB belongs to NXP's ABT logic family, engineered for high-speed, low-power 5 V bus interfacing in industrial control and instrumentation systems where reliability under wide temperature and ESD stress is critical.
FAQ
What is the maximum clock frequency supported by the 74ABT652ADB over its full operating temperature range?
The 74ABT652ADB guarantees a minimum maximum clock frequency of 125 MHz across −40 °C to +85 °C, as specified in Table 7 of the NXP datasheet. At 25 °C and VCC = 5.0 V, typical performance reaches 300 MHz, but design margins should be based on the 125 MHz worst-case rating for industrial applications. This ensures reliable register sampling and transceiver operation under thermal and voltage extremes.
How does the 74ABT652ADB handle simultaneous clocking on CPAB and CPBA inputs?
The 74ABT652ADB permits simultaneous rising-edge clocking on CPAB and CPBA only when both SAB and SBA are held LOW, as stated in Note [3] of Table 3. If either select input is HIGH, clocks must be staggered to prevent undefined register states. This behavior is enforced by internal control logic to avoid metastability and ensure deterministic data capture on both buses.
Does the 74ABT652ADB support live insertion and extraction in powered-backplane systems?
Yes, the 74ABT652ADB supports live insertion/extraction due to its HBM ESD rating exceeding 2000 V and built-in power-up 3-state behavior. During hot-swap, the outputs remain high-impedance until VCC stabilizes, preventing bus contention. This capability is explicitly listed in Section 2 ("Features and benefits") and validated per JESD22-A114F.
What are the absolute maximum ratings for supply voltage and junction temperature of the 74ABT652ADB?
The 74ABT652ADB has an absolute maximum supply voltage (VCC) of +7.0 V and a maximum junction temperature (Tj) of 150 °C, per Table 4 in the NXP datasheet. Exceeding either rating-even momentarily-may cause permanent damage. Recommended operating VCC is strictly 4.5 V to 5.5 V, and thermal design must ensure Tj remains ≤150 °C under worst-case power dissipation.
Can the 74ABT652ADB operate with mixed-voltage signaling, such as 3.3 V inputs driving a 5 V VCC rail?
No, the 74ABT652ADB is not designed for mixed-voltage operation. Its input voltage (VI) must stay within 0 V to VCC per Table 5, and VIH/VIL thresholds are referenced to VCC (e.g., VIH ≥ 2.0 V at VCC = 4.5 V). Applying 3.3 V signals to a 5 V-powered 74ABT652ADB may result in marginal or non-compliant logic levels and is not guaranteed by the datasheet.
74ABT652ADB,112 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- 74ABT
- Package/Case:
- 24-SSOP (0.209", 5.30mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- 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-SSOP
74ABT652ADB,112 FAQ
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6.How does Aetrix verify that 74ABT652ADB,112 is sourced from the original manufacturer or authorized distributors?
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7.What is the process for return or replacement of 74ABT652ADB,112?
All 74ABT652ADB,112 units undergo pre-shipment inspection (PSI). If there is an issue with 74ABT652ADB,112, 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 74ABT652ADB,112 part is unused and in its original packaging.
Return procedure for 74ABT652ADB,112:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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