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Texas Instruments SN74ABTH32245PZ
- Part No.:
- SN74ABTH32245PZ
- Manufacturer:
- Texas Instruments
- Package:
- 100-LQFP
- Datasheet:
-
SN74ABTH32245PZ.pdf
- Description:
- IC TXRX NON-INVERT 5.5V 100LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:4,264
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Product details
Overview
SN74ABTH32245PZ from Texas Instruments is a 36-bit (quad 9-bit) noninverting bus transceiver with 3-state outputs, designed for synchronous bidirectional data transfer between parallel buses in high-speed digital systems. It features –32-mA IOH / 64-mA IOL drive strength, bus-hold on all data inputs, and operates over –40°C to 85°C at 4.5–5.5 V supply. Used in industrial backplane interfaces and legacy computing bus isolation.
For engineers reviewing the SN74ABTH32245PZ datasheet, SN74ABTH32245PZ pinout, SN74ABTH32245PZ application, or SN74ABTH32245PZ equivalent, key selection criteria include 3-state control timing (tPZH ≤ 7.3 ns), distributed VCC/GND pin layout for noise reduction, bus-hold functionality eliminating external resistors, and PZ-package thermal resistance (θJA = 50°C/W).
Technical Context
The SN74ABTH32245PZ implements four independent 9-bit transceiver sections, each with separate DIR (direction) and OE (output enable) controls. Its EPIC-IIB BiCMOS process enables high-drive capability while maintaining low power dissipation and latch-up immunity exceeding 500 mA per JESD-17.
It supports flexible configuration as one 36-bit, two 18-bit, or four 9-bit transceivers. Bus-hold circuitry actively maintains valid logic levels on floating A/B port inputs, and the device enters high-impedance state during power-up/down when VCC is below 2.1 V - critical for hot-swap and sequencing robustness.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 4.5 V to 5.5 V - compatible with standard 5-V TTL/CMOS logic rails and ensures stable operation across supply variation. |
| IOH / IOL | –32 mA / 64 mA - drives heavy capacitive loads and long traces without external buffers in backplane or motherboard applications. |
| tPLH / tPHL | 1.7–5.0 ns - enables >100-MHz bus clocking in synchronous systems with tight timing margins. |
| Bus-Hold Current | ±100 µA at VI = 0.8 V or 2.0 V - eliminates need for external pullup/pulldown resistors on unused data lines, reducing BOM count and board space. |
| θJA | 50°C/W - supports sustained operation at full drive in industrial ambient temperatures up to 85°C with standard PCB copper area. |
| VOL / VOH | 0.55 V max at IOL = 64 mA / 2.0 V min at IOH = –32 mA - guarantees TTL-compatible voltage margins under worst-case loading. |
| Operating Temp | –40°C to +85°C - qualified for commercial and industrial environments including factory automation and telecom infrastructure. |
Pinout & Package
SN74ABTH32245PZ uses a 100-pin LQFP (PZ) package with 14 × 14 mm body, 0.5-mm lead pitch, and exposed thermal pad. Distributed VCC and GND pins minimize simultaneous switching noise; pin 1 marked by corner notch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1A1–1A9, 1B1–1B9 | Data I/O Port A/B (Section 1) | 9-bit bidirectional data channels; bus-hold active on all inputs to prevent floating states. |
| 1DIR, 2DIR, 3DIR, 4DIR | Direction Control Input | Active-high logic selects data flow direction per section: DIR = H → A→B; DIR = L → B→A. |
| 1OE, 2OE, 3OE, 4OE | Output Enable Input | Active-low control: OE = L enables transceiver; OE = H forces 3-state high-impedance output. |
| VCC (Pins 13, 26, 39, 50, 62, 74, 86, 92) | Power Supply | Eight distributed VCC pins reduce IR drop and high-frequency impedance, improving signal integrity on wide buses. |
| GND (Pins 12, 25, 38, 51, 63, 75, 87, 89, 90, 91, 93–100) | Ground Reference | Eleven GND pins provide low-inductance return paths and suppress ground bounce (VOLP < 0.8 V). |
Key Features
| Feature | Design Value |
|---|---|
| Quad 9-bit configurable architecture | Supports 36-, 18-, or 9-bit bus widths via independent DIR/OE controls - simplifies reuse across multiple system partitioning schemes. |
| High-drive BiCMOS outputs | –32-mA source / 64-mA sink capability drives 50-pF loads at <5 ns propagation delay - suitable for driving long stubs in multi-drop backplanes. |
| Integrated bus-hold | Eliminates external pullup/pulldown resistors on all 72 data I/Os - reduces component count, layout complexity, and risk of signal integrity degradation. |
| Power-up/power-down high-Z | Automatically enters 3-state when VCC < 2.1 V - prevents bus contention during power sequencing and hot-plug events without external logic. |
| MIL-PRF-38535 QML-qualified variant available | 5962-9557701NXD version meets military reliability and screening requirements - enables dual-use designs across commercial and defense platforms. |
Applications
| Industrial Backplane Interface | Legacy Computing Bus Isolation |
|---|---|
|
Use Scenario: Isolating CPU and peripheral buses in programmable logic controllers (PLCs) with mixed-voltage domains and hot-swap capability. IC Role / Device Role / Timing Role: Bidirectional level-shifting transceiver enabling synchronous data exchange between 5-V CPU bus and 5-V I/O expansion bus with controlled enable timing. Use Value: Bus-hold prevents floating inputs during module insertion/removal; distributed power pins suppress noise in electrically noisy factory environments. |
Use Scenario: Interfacing ISA or VMEbus peripherals to modern microcontroller-based control units in retro-computing or test equipment upgrades. IC Role / Device Role / Timing Role: 36-bit wide data path buffer with independent section control, supporting burst-mode transfers and partial bus arbitration. Use Value: High drive strength sustains signal integrity across long backplane traces; 3-state isolation prevents bus contention during reset or firmware updates. |
| Telecom Line Card Data Multiplexing | Test Equipment Signal Routing |
|
Use Scenario: Aggregating multiple T1/E1 interface data streams onto a shared diagnostic bus inside carrier-grade line cards. IC Role / Device Role / Timing Role: Synchronous transceiver managing time-division multiplexed data routing between framer ICs and host processor memory maps. Use Value: Low propagation delay (≤5 ns) and tight skew support deterministic timing alignment across 36-bit parallel paths. |
Use Scenario: Reconfigurable signal routing matrix in automated test equipment (ATE) for DUT interface adaptation across multiple product families. IC Role / Device Role / Timing Role: Programmable bus switch enabling dynamic reconnection of 36-bit DUT I/Os to instrument channels under software control. Use Value: Independent OE/DIR per 9-bit section allows granular control of signal paths without full-bus reconfiguration latency. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74ABT32245PZ | Omits bus-hold circuitry; identical pinout, drive strength, and timing. | Requires external pullup/pulldown resistors on all data lines - increases BOM cost and layout area. | Select when bus-hold is unnecessary and lowest possible static current is required. |
| SN74LVTH32245PZ | Lower VCC range (2.7–3.6 V); reduced drive (–24 mA / 48 mA); higher tPLH/tPHL (≤7.5 ns). | Designed for 3.3-V systems only; not 5-V tolerant - incompatible with legacy 5-V bus environments. | Choose only for new 3.3-V designs where power efficiency outweighs compatibility and speed. |
Compared with SN74ABTH32245PZ, SN74ABT32245PZ removes bus-hold but retains full 5-V operation and timing, while SN74LVTH32245PZ shifts to 3.3-V logic with lower performance - making SN74ABTH32245PZ the sole option supporting 5-V bus-hold transceivers in industrial temperature range.
Availability
SN74ABTH32245PZ is available at Aetrix Electronics and suitable for industrial backplane interfaces, legacy computing bus isolation, telecom line card data multiplexing, and test equipment signal routing requiring stable component supply and long-term lifecycle support.
Supply support for SN74ABTH32245PZ 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 interface ICs and military-qualified components.
The SN74ABTH32245PZ belongs to TI's Widebus+™ family of high-speed bus interface devices, engineered specifically for robust, noise-immune data transfer in industrial, telecom, and computing backplane applications.
FAQ
What is the operating temperature range for SN74ABTH32245PZ?
The SN74ABTH32245PZ is characterized for operation from –40°C to +85°C, meeting industrial-grade environmental requirements. This range is confirmed in the recommended operating conditions table of the SCBS228G datasheet, and distinguishes it from the military-grade SN54ABTH32245 (–55°C to +125°C). The PZ package qualification supports reliable performance across this full span without derating.
Does SN74ABTH32245PZ require external pullup resistors on data lines?
No, SN74ABTH32245PZ includes active bus-hold circuitry on all A and B port inputs, which maintains valid logic levels on floating or unused lines without external components. Electrical characteristics specify ±100 µA hold current at VI = 0.8 V or 2.0 V, eliminating the need for pullup/pulldown resistors and reducing BOM count and board area.
What is the maximum output drive capability of SN74ABTH32245PZ?
SN74ABTH32245PZ delivers –32 mA high-level output current (IOH) and 64 mA low-level output current (IOL) at VCC = 4.5 V, per the recommended operating conditions table. This high-drive capability enables direct interfacing with heavily loaded buses and long PCB traces without additional buffering, supporting robust signal integrity in demanding industrial environments.
Is SN74ABTH32245PZ pin-compatible with other ABTH32245 variants?
Yes, SN74ABTH32245PZ shares identical pinout and function with SN54ABTH32245 (military) and SN74ABTH32245 in HS ceramic package - all use the same logic diagram, terminal assignments, and functional behavior. However, the HS package is not production released, so SN74ABTH32245PZ is the only commercially available and qualified variant in volume production.
How does SN74ABTH32245PZ handle power sequencing during startup and shutdown?
SN74ABTH32245PZ automatically enters high-impedance state when VCC is between 0 and 2.1 V, preventing bus contention during power-up and power-down. To ensure guaranteed 3-state above 2.1 V, OE must be tied to VCC via a pullup resistor - minimum value determined by driver sink capability, as specified in the datasheet's description section.
SN74ABTH32245PZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ABTH
- Package/Case:
- 100-LQFP
- Packaging:
- Bulk
- Product Status:
- Active
- Logic Type:
- Transceiver, Non-Inverting
- Number of Elements:
- 4
- Number of Bits per Element:
- 9
- 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:
- 100-LQFP (14x14)
SN74ABTH32245PZ FAQ
1.How can I place an order for SN74ABTH32245PZ through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74ABTH32245PZ 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 SN74ABTH32245PZ reliable?
The price and inventory of SN74ABTH32245PZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ABTH32245PZ is usually 5 days.
3.What payment methods are accepted for SN74ABTH32245PZ?
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4.How is shipping managed for SN74ABTH32245PZ?
SN74ABTH32245PZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74ABTH32245PZ 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 SN74ABTH32245PZ?
For technical support, including SN74ABTH32245PZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ABTH32245PZ requirements.
6.How does Aetrix verify that SN74ABTH32245PZ is sourced from the original manufacturer or authorized distributors?
All SN74ABTH32245PZ 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 SN74ABTH32245PZ meets industry standards.
7.What is the process for return or replacement of SN74ABTH32245PZ?
All SN74ABTH32245PZ units undergo pre-shipment inspection (PSI). If there is an issue with SN74ABTH32245PZ, 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 SN74ABTH32245PZ part is unused and in its original packaging.
Return procedure for SN74ABTH32245PZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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