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Texas Instruments SN74ABTH162245DGVR
- Part No.:
- SN74ABTH162245DGVR
- Manufacturer:
- Texas Instruments
- Package:
- 48-TFSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74ABTH162245DGVR.pdf
- Description:
- IC TXRX NON-INVERT 5.5V 48TVSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,481
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Product details
Overview
SN74ABTH162245 from Texas Instruments is a 16-bit noninverting bus transceiver with 3-state outputs, designed for synchronous two-way data communication between A and B buses in high-speed digital systems. It supports bidirectional data flow controlled by DIR, isolation via OE, and features integrated 25-Ω series resistors on A-port outputs to suppress overshoot/undershoot - used in industrial backplanes and memory interface subsystems.
For engineers reviewing the SN74ABTH162245 datasheet, SN74ABTH162245 pinout, SN74ABTH162245 application, or SN74ABTH162245 equivalent, key selection considerations include its –40°C to 85°C temperature range, 48-pin TSSOP (DGG) package, 12 mA A-port / 64 mA B-port drive capability, and bus-hold circuitry eliminating external pull resistors.
Technical Context
The SN74ABTH162245 implements dual 8-bit or single 16-bit bidirectional data transfer using separate direction (DIR) and output-enable (OE) controls per section. Its EPIC-IIB BiCMOS process enables low power dissipation while maintaining TTL-compatible input thresholds (VIL = 0.8 V, VVIH = 2 V) and fast propagation delays (tPLH/tPHL ≤ 4.2 ns at 5 V).
It integrates bus-hold circuitry on all data inputs to maintain valid logic states when floating, and features distributed VCC/GND pinning plus flow-through pin architecture to minimize switching noise and optimize PCB layout - critical for dense, high-frequency board designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - ensures compatibility with standard 5-V TTL and mixed-voltage system rails. |
| A-Port Output Drive | ±12 mA - sufficient to directly drive 50-Ω transmission lines or multiple TTL loads without external buffers. |
| B-Port Output Drive | 64 mA sink / 32 mA source - supports heavy capacitive loading typical in backplane or motherboard interconnects. |
| Propagation Delay | ≤ 4.2 ns (A→B), ≤ 4.6 ns (B→A) - enables reliable operation in >200 MHz bus clock domains. |
| Bus-Hold Current | ±100 µA - actively maintains stable logic levels on unused inputs, removing need for external pullup/pulldown resistors. |
| Output Series Resistance | 25 Ω (A-port only) - reduces signal ringing and EMI without requiring discrete termination components. |
| Operating Temperature | –40°C to +85°C - qualified for industrial-grade embedded control and communications equipment. |
Pinout & Package
SN74ABTH162245 is packaged in a 48-pin Thin Shrink Small-Outline Package (TSSOP-DGG), 7.9 mm × 12.6 mm body, 0.5 mm pitch, RoHS-compliant with NIPDAU lead finish and MSL Level-1 rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1DIR, 2DIR | Direction Control Input | Determines data flow direction per 8-bit section: DIR = L → B-to-A; DIR = H → A-to-B. |
| 1OE, 2OE | Output Enable Input | Active-low control: OE = L enables outputs; OE = H forces all outputs into high-impedance state. |
| 1A1–1A8, 2A1–2A8 | A-Side Data I/O | Noninverting bidirectional data terminals for first and second 8-bit A-bus segments. |
| 1B1–1B8, 2B1–2B8 | B-Side Data I/O | Noninverting bidirectional data terminals for first and second 8-bit B-bus segments. |
| VCC (Pins 7, 18, 29, 40) | Power Supply | Distributed VCC pins reduce simultaneous switching noise and improve power integrity across wide bus. |
| GND (Pins 4, 11, 22, 33, 44) | Ground Reference | Five dedicated GND pins provide low-inductance return paths and enhance signal integrity. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 25-Ω Series Resistors (A-port) | Eliminates external series termination components, reducing BOM count and PCB area in high-speed routing. |
| Bus-Hold Circuitry | Maintains valid logic state on floating data inputs without external resistors - simplifies system power-up sequencing. |
| Flow-Through Pin Architecture | Input and output pins aligned on opposite sides of package - enables straight-layer PCB trace routing and minimizes crosstalk. |
| Distributed VCC/GND Pins | Reduces ground bounce (VOLP < 1 V) and supply rail collapse during high-speed switching transitions. |
| Latch-Up Immunity | Exceeds 500 mA per JESD17 - ensures robust operation in electrically noisy industrial environments. |
Applications
| Industrial Backplane Interface | Memory Subsystem Interconnect |
|---|---|
Use Scenario: Bidirectional data transfer between CPU module and I/O expansion cards in modular PLC chassis. IC Role / Device Role / Timing Role: Bus transceiver managing synchronous 16-bit parallel data exchange between isolated voltage domains with precise direction and enable timing. Use Value: Enables hot-swap-capable backplane design using OE-controlled isolation and bus-hold protection against floating signals during card insertion/removal. | Use Scenario: Interfacing FPGA-based memory controller to dual-rank DDR SDRAM modules with shared address/data bus. IC Role / Device Role / Timing Role: Level-shifting and bus-isolation transceiver supporting read-modify-write cycles and bank-switching coordination. Use Value: 25-Ω A-port series resistance suppresses reflections on stub-loaded memory bus traces, improving signal integrity at 100+ MHz clock rates. |
| Test Equipment Data Path | Automated Test Fixture Interface |
Use Scenario: High-speed pattern generator/digitizer channel multiplexing in ATE mainframe backplane. IC Role / Device Role / Timing Role: Reconfigurable 16-bit data path switch enabling dynamic routing between instrument modules and DUT interface boards. Use Value: Low propagation delay (<4.6 ns) and tight skew control support deterministic timing alignment across multi-channel test vectors. | Use Scenario: Isolating and conditioning control signals between PC-based test sequencer and custom DUT adapter board. IC Role / Device Role / Timing Role: Signal integrity buffer and bus isolator for GPIO, address strobe, and handshake lines in production test fixtures. Use Value: Eliminates need for 32 external pull resistors via integrated bus-hold, reducing fixture component count and assembly cost. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC162245DGGR | 3.3-V only operation (1.65–3.6 V), lower drive (24 mA B-port), no internal series resistors. | Suitable for low-voltage, low-power portable or battery-operated systems; not pin-compatible for 5-V legacy designs. | Select when migrating to 3.3-V infrastructure and board space allows external termination. |
| SN74ABT162245DGGR | Same 5-V operation but lacks bus-hold circuitry; requires external pull resistors on unused inputs. | Used where input biasing is managed externally or where bus-hold adds unnecessary current leakage in ultra-low-power sleep modes. | Choose if existing design already includes pull resistors and thermal budget favors slightly lower ICCEX. |
Compared with SN74ABTH162245, SN74LVC162245DGGR offers voltage scalability at the cost of 5-V compatibility and signal integrity features, while SN74ABT162245DGGR trades bus-hold convenience for marginally lower static current - both require layout review due to non-drop-in functional differences.
Availability
SN74ABTH162245 is available at Aetrix Electronics and suitable for industrial backplane interfaces, memory subsystem interconnects, and automated test equipment requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for SN74ABTH162245 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 delivering analog, embedded processing, and logic solutions for industrial, automotive, and communications markets.
The ABTH162245 belongs to TI's Widebus™ family of high-speed bus interface devices, engineered specifically for noise-resilient, high-density data routing in industrial control and test instrumentation systems.
FAQ
What is the maximum operating temperature range for the SN74ABTH162245?
The SN74ABTH162245 is characterized for operation from –40°C to +85°C, meeting industrial-grade environmental requirements. This specification is validated per the recommended operating conditions table in the official datasheet (SCBS712A), and applies specifically to the SN74ABTH162245 variant - the military-grade SN54ABTH162245 extends to –55°C to +125°C.
Does the SN74ABTH162245 require external pull-up or pull-down resistors on its data inputs?
No, the SN74ABTH162245 includes active bus-hold circuitry on all data inputs, which maintains valid logic levels on unused or floating inputs without external resistors. This feature is confirmed in the device description and electrical characteristics tables of the SCBS712A datasheet, and applies identically across all package variants including SN74ABTH162245DGVR.
What package type does the SN74ABTH162245DGVR use, and what are its key mechanical dimensions?
The SN74ABTH162245DGVR uses a 48-pin Thin Shrink Small-Outline Package (TSSOP-DGG) with 0.5 mm pitch, 7.9 mm × 12.6 mm body size, and 1.2 mm max height. This matches TI's official packaging documentation for orderable part SN74ABTH162245DGGR, confirming DGVR is a variant within the same DGG package family.
How does the SN74ABTH162245 manage output signal integrity on the A-port versus the B-port?
The SN74ABTH162245 integrates 25-Ω series resistors only on A-port outputs to dampen overshoot and undershoot, while B-port outputs rely on external termination or system-level impedance matching. This asymmetry is explicitly documented in the device description and absolute maximum ratings, and is retained across all SN74ABTH162245 variants including DGVR.
Can the SN74ABTH162245 be used as two independent 8-bit transceivers?
Yes, the SN74ABTH162245 contains two functionally independent 8-bit sections - each with dedicated DIR and OE controls (1DIR/1OE and 2DIR/2OE) - allowing concurrent bidirectional operation between separate A/B bus pairs. This dual-section architecture is defined in the functional diagram and truth table of the SCBS712A datasheet and applies to all SN74ABTH162245 package variants.
SN74ABTH162245DGVR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ABTH
- Package/Case:
- 48-TFSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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:
- 12mA, 12mA; 32mA, 64mA
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-TVSOP
SN74ABTH162245DGVR FAQ
1.How can I place an order for SN74ABTH162245DGVR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74ABTH162245DGVR on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
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6.How does Aetrix verify that SN74ABTH162245DGVR is sourced from the original manufacturer or authorized distributors?
All SN74ABTH162245DGVR 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 SN74ABTH162245DGVR meets industry standards.
7.What is the process for return or replacement of SN74ABTH162245DGVR?
All SN74ABTH162245DGVR units undergo pre-shipment inspection (PSI). If there is an issue with SN74ABTH162245DGVR, 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 SN74ABTH162245DGVR part is unused and in its original packaging.
Return procedure for SN74ABTH162245DGVR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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