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Texas Instruments SN74ABT162244DLG4
- Part No.:
- SN74ABT162244DLG4
- Manufacturer:
- Texas Instruments
- Package:
- 48-BSSOP (0.295", 7.50mm Width)
- Datasheet:
-
SN74ABT162244DLG4.pdf
- Description:
- IC BUFF NON-INVERT 5.5V 48SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,000
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Product details
Overview
SN74ABT162244DLG4 from Texas Instruments is a 16-bit noninverting buffer/line driver with four independent 4-bit sections, each featuring active-low 3-state output-enable (OE) control. It operates at 4.5–5.5 V, delivers ±12 mA drive strength per output, integrates 25-Ω series termination resistors, and supports hot insertion via Ioff and power-up 3-state functionality - used in memory address buffering, clock distribution, and high-speed bus interfacing.
For engineers reviewing the SN74ABT162244DLG4 datasheet, SN74ABT162244DLG4 pinout, SN74ABT162244DLG4 application, or SN74ABT162244DLG4 equivalent, key selection considerations include its SSOP-48 package, 3.2 ns typical propagation delay (tPLH), 25-Ω integrated series resistance for signal integrity, and guaranteed hot-swap capability per JESD78 and TI's Ioff specification.
Technical Context
The SN74ABT162244DLG4 implements a flow-through pin architecture across four identical 4-bit buffer sections, each with symmetrical active-low OE inputs and noninverting outputs. Its distributed VCC/GND pin layout minimizes simultaneous switching noise, while internal 25-Ω series resistors suppress overshoot/undershoot without external components.
It features dual-stage power sequencing support: Ioff disables outputs when VCC = 0 V to prevent backflow current, and power-up 3-state forces outputs into high-impedance during VCC ramp-up (≤200 µs/V). Latch-up performance exceeds 500 mA per JESD17, and ground bounce (VOLP) remains <1 V at 5 V/25°C.
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 ABT logic systems. |
| Output Drive Strength | ±12 mA per output - sufficient to drive 50-pF loads at ≤4 ns propagation delay while maintaining signal integrity. |
| Propagation Delay (tPLH) | 1 ns (min) to 3.9 ns (max) at 5 V/25°C - enables reliable operation in high-speed address/data buses up to ~250 MHz. |
| Integrated Series Resistance | 25 Ω - eliminates need for external source termination resistors, reducing BOM count and PCB area. |
| Ioff Current | ±100 µA max at VCC = 0 - prevents damaging current backflow during hot insertion or partial power-down. |
| Power-Up 3-State | Active during VCC ramp-up (≤200 µs/V) - avoids bus contention before system initialization completes. |
| Input Capacitance (Ci) | 3 pF - minimizes loading on upstream drivers and preserves timing margins in fanout-critical paths. |
Pinout & Package
SN74ABT162244DLG4 is housed in a 48-pin SSOP (Shrink Small-Outline Package) with 0.5-mm pitch, 12.6 mm × 6.2 mm body size, and 1.2 mm max height - optimized for high-density PCB layouts with thermal resistance θJA = 63°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OE, 2OE, 3OE, 4OE | Active-low output-enable control | Each independently enables/disables one 4-bit buffer section; tied to VCC via pullup for safe power-up state. |
| 1A1–1A4, 2A1–2A4, 3A1–3A4, 4A1–4A4 | Noninverting data inputs | 16 total inputs grouped into four 4-bit banks; compatible with TTL/CMOS logic levels. |
| 1Y1–1Y4, 2Y1–2Y4, 3Y1–3Y4, 4Y1–4Y4 | Noninverting buffered outputs | 16 outputs with 25-Ω series resistance; capable of sourcing/sinking ±12 mA into 50-pF loads. |
| VCC (Pins 7, 18, 31, 42) | Power supply | Distributed VCC pins reduce IR drop and switching noise across the 16-bit bus. |
| GND (Pins 4, 10, 15, 21, 28, 34, 39, 45) | Ground reference | Eight GND pins provide low-inductance return paths for all output drivers and minimize ground bounce. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 25-Ω series output resistors | Eliminates external termination components, reduces PCB layout complexity, and improves signal fidelity on FR-4 traces. |
| Hot-insertion support via Ioff | Prevents reverse current flow when SN74ABT162244DLG4 is inserted into a live backplane or powered system. |
| Power-up 3-state circuitry | Guarantees high-impedance outputs during VCC ramp-up, avoiding bus conflicts before firmware initializes OE controls. |
| Flow-through pin architecture | Input-to-output pin alignment (e.g., 1A1→1Y1 adjacent) simplifies trace routing and reduces crosstalk in parallel bus designs. |
| Distributed VCC/GND pinning | Four VCC and eight GND pins minimize simultaneous switching noise and improve power delivery stability for 16-bit switching. |
Applications
| Memory Address Buffering | Clock Distribution Network |
|---|---|
Use Scenario: Driving 16-bit address lines from a microcontroller to multiple SRAM or Flash devices on a shared bus. IC Role / Device Role / Timing Role: Noninverting buffer with 3-state control isolates address bus segments during chip select transitions. Use Value: Integrated 25-Ω resistors suppress ringing on long traces; 3.9 ns max tPLH ensures setup/hold timing compliance at 25 MHz bus clocks. | Use Scenario: Fanout of a single system clock to multiple synchronous peripherals (e.g., ADCs, DACs, FPGAs). IC Role / Device Role / Timing Role: Low-skew, high-drive buffer replicating clock edges with matched propagation delay across all 16 outputs. Use Value: Symmetrical tPLH/tPHL (1–3.9 ns) and 25-Ω series resistance maintain edge monotonicity and reduce jitter accumulation. |
| Hot-Swappable Backplane Interface | Legacy Bus Transceiver Support |
Use Scenario: Enabling field-replaceable modules in telecom or industrial chassis where cards are inserted while main power remains active. IC Role / Device Role / Timing Role: Ioff and power-up 3-state protect backplane signals during card insertion/removal sequences. Use Value: ±100 µA Ioff at VCC = 0 V prevents damage to upstream drivers; OE-controlled isolation allows dynamic bus reconfiguration. | Use Scenario: Interfacing modern microcontrollers with legacy ISA, PC/104, or industrial parallel buses requiring 5-V tolerant, high-current drivers. IC Role / Device Role / Timing Role: Level-shifting and current-boosting buffer between low-power MCU GPIOs and high-capacitance bus loads. Use Value: ±12 mA drive strength sustains logic levels under 50-pF load; 4.5–5.5 V operation matches legacy 5-V rail requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-bit noninverting buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74ABT162244DGGR | TSSOP-48 package (5.1 mm × 6.2 mm); θJA = 70°C/W; same electrical specs and pinout. | Better suited for automated SMT assembly with tighter board space constraints; slightly higher thermal resistance. | Select when footprint density and reflow compatibility outweigh thermal margin requirements. |
| SN74ABT162244DGVR | TVSOP-48 package (3.6 mm × 6.2 mm); θJA = 58°C/W; identical logic function and timing. | Optimized for ultra-compact designs with aggressive layer stacking; requires precise stencil design due to 0.4-mm pitch. | Choose for space-constrained portable or modular systems where thermal performance is prioritized over assembly yield. |
Compared with SN74ABT162244DGGR and SN74ABT162244DGVR, the SN74ABT162244DLG4 offers the largest pad pitch (0.5 mm) and lowest assembly risk in SSOP format, making it ideal for prototyping, low-volume production, and thermal-aware designs where θJA = 63°C/W provides headroom over TSSOP/TVSOP variants.
Availability
SN74ABT162244DLG4 is available at Aetrix Electronics and suitable for memory subsystems, clock tree distribution, hot-pluggable backplanes, and industrial bus interfaces requiring stable component supply across extended temperature ranges (−40°C to 85°C).
Supply support for SN74ABT162244DLG4 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-speed interface and bus technology.
The SN74ABT162244DLG4 belongs to TI's Widebus™ family of advanced bus-interface logic, engineered specifically for high-density, high-speed memory addressing, clock fanout, and bus transceivers in computing, communications, and industrial control systems.
FAQ
What is the recommended pullup resistor value for OE pins on the SN74ABT162244DLG4?
The OE pins of the SN74ABT162244DLG4 must be tied to VCC through a pullup resistor to ensure high-impedance state during power-up. The minimum resistor value depends on the current-sinking capability of the driving source; TI specifies that the resistor should allow sufficient current to meet VIH ≥ 2 V while staying within the driver's sink rating - typically 4.7 kΩ to 10 kΩ for standard 5-V CMOS drivers. This ensures robust noise immunity and fast enable/disable transitions without overloading upstream logic.
Does the SN74ABT162244DLG4 require external series termination resistors?
No, the SN74ABT162244DLG4 does not require external series termination resistors because it integrates 25-Ω series resistors on all 16 outputs. These on-die resistors are designed to match typical PCB trace impedances (e.g., 50 Ω) and suppress overshoot/undershoot in point-to-point or short-bus configurations. External resistors may still be needed for longer traces or specific impedance-matching requirements beyond the device's built-in compensation.
Can the SN74ABT162244DLG4 be used in hot-swap applications?
Yes, the SN74ABT162244DLG4 is explicitly designed for hot-insertion applications. Its Ioff circuitry disables outputs when VCC = 0 V, preventing damaging current backflow, and its power-up 3-state feature holds all outputs in high-impedance during VCC ramp-up. These capabilities comply with JESD78 latch-up immunity (>500 mA) and are validated per TI's ABT family specifications - making SN74ABT162244DLG4 suitable for telecom line cards, modular servers, and industrial backplanes.
What is the maximum operating frequency supported by the SN74ABT162244DLG4?
The SN74ABT162244DLG4 does not specify a maximum clock frequency directly, but its switching characteristics support reliable operation in systems with bus frequencies up to ~250 MHz. With a typical propagation delay of 2.5 ns (tPLH) and 3.1 ns (tPHL) at 5 V/25°C, and a maximum of 3.9 ns/4.8 ns, it meets setup/hold timing for 25-MHz address/data buses and can drive 50-pF loads with clean edges. System-level frequency limits depend on trace length, termination, and load capacitance - not the device itself.
How does the flow-through architecture of the SN74ABT162244DLG4 benefit PCB layout?
The flow-through architecture of the SN74ABT162244DLG4 aligns inputs and outputs on opposite sides of the SSOP-48 package (e.g., 1A1 on pin 47 → 1Y1 on pin 2), enabling straight-line trace routing with minimal layer changes or vias. This reduces crosstalk, maintains consistent trace lengths across bit lanes, simplifies differential pair routing for complementary signals, and lowers overall signal-integrity risk - especially critical in high-speed memory and clock distribution applications where skew and reflection must be minimized.
SN74ABT162244DLG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ABT
- Package/Case:
- 48-BSSOP (0.295", 7.50mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Logic Type:
- Buffer, Non-Inverting
- Number of Elements:
- 4
- Number of Bits per Element:
- 4
- Input Type:
- -
- Output Type:
- 3-State
- Current - Output High, Low:
- 12mA, 12mA
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-SSOP
SN74ABT162244DLG4 FAQ
1.How can I place an order for SN74ABT162244DLG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74ABT162244DLG4 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 SN74ABT162244DLG4 reliable?
The price and inventory of SN74ABT162244DLG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ABT162244DLG4 is usually 5 days.
3.What payment methods are accepted for SN74ABT162244DLG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74ABT162244DLG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74ABT162244DLG4?
SN74ABT162244DLG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74ABT162244DLG4 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 SN74ABT162244DLG4?
For technical support, including SN74ABT162244DLG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ABT162244DLG4 requirements.
6.How does Aetrix verify that SN74ABT162244DLG4 is sourced from the original manufacturer or authorized distributors?
All SN74ABT162244DLG4 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 SN74ABT162244DLG4 meets industry standards.
7.What is the process for return or replacement of SN74ABT162244DLG4?
All SN74ABT162244DLG4 units undergo pre-shipment inspection (PSI). If there is an issue with SN74ABT162244DLG4, 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 SN74ABT162244DLG4 part is unused and in its original packaging.
Return procedure for SN74ABT162244DLG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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