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Texas Instruments SN74LVCH162244AGR
- Part No.:
- SN74LVCH162244AGR
- Manufacturer:
- Texas Instruments
- Package:
- 48-TFSOP (0.240", 6.10mm Width)
- Datasheet:
-
SN74LVCH162244AGR.pdf
- Description:
- IC BUF NON-INVERT 3.6V 48TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,923
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Product details
Overview
SN74LVCH162244AGR from Texas Instruments is a 16-bit noninverting buffer/driver with 3-state outputs, designed for 1.65-V to 3.6-V VCC operation. It features four independent 4-bit sections, each with active-low output-enable (OE) control, 5.5-V-tolerant inputs, integrated bus-hold circuitry, and 26-Ω series output resistors-enabling direct interface between 3.3-V logic and legacy 5-V systems in server memory address buffering.
For engineers reviewing the SN74LVCH162244AGR datasheet, SN74LVCH162244AGR pinout, SN74LVCH162244AGR application, or SN74LVCH162244AGR equivalent, key selection criteria include Ioff-enabled live insertion support, mixed-mode signal compatibility (5-V input / 3.3-V VCC), tpd ≤ 4.4 ns at 3.3 V, and guaranteed 125°C operation with 26-Ω on-die termination eliminating external resistors.
Technical Context
This device implements true-output, noninverting buffering with symmetrical active-low OE per 4-bit group. Each section operates independently, supporting flexible partitioning as four 4-bit, two 8-bit, or one 16-bit buffer. The Ioff circuitry ensures back-drive protection during partial power-down by disabling outputs when VCC = 0 V.
Bus-hold circuitry actively maintains valid logic states on undriven or floating inputs without external pullup/pulldown resistors. Inputs tolerate up to 5.5 V regardless of VCC level (1.65–3.6 V), enabling reliable down-translation in mixed-voltage systems such as PC motherboard I/O expansion buses.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 1.65 V to 3.6 V - supports single-supply operation across low-voltage logic families including 1.8-V, 2.5-V, and 3.3-V systems |
| Input Voltage Tolerance | Up to 5.5 V - enables safe interfacing with 5-V peripherals without level shifters in mixed-voltage designs |
| Max Propagation Delay | 4.4 ns at VCC = 3.3 V - ensures timing-critical performance in high-speed address/data buffering applications |
| Output Drive Strength | ±12 mA at VCC = 3.0 V - sufficient to drive standard CMOS loads and light stubs without external termination |
| Bus-Hold Current | ±75 μA at VCC = 3.0 V - actively holds unconnected inputs at valid logic levels, eliminating need for external biasing |
| Ioff Leakage | ±10 μA at VI/VO = 5.5 V - prevents damaging current flow during hot-insertion or partial power-down sequences |
| Operating Temperature | –40°C to +125°C - qualified for industrial and extended-temperature embedded computing environments |
Pinout & Package
TSSOP-48 package (DGG), body size 12.50 mm × 6.10 mm, 0.5-mm pitch, lead finish NiPdAu, MSL Level-1, RoHS compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OE, 2OE, 3OE, 4OE | Active-low output enable (per 4-bit group) | Controls 3-state output for corresponding A/Y pair; tied to VCC via pullup for power-up high-impedance safety |
| 1A1–1A4, 2A1–2A4, 3A1–3A4, 4A1–4A4 | Buffer input (16 total) | 5.5-V-tolerant CMOS inputs with bus-hold; accept 1.65–3.6-V logic levels or 5-V signals directly |
| 1Y1–1Y4, 2Y1–2Y4, 3Y1–3Y4, 4Y1–4Y4 | Noninverting buffered output (16 total) | True-output, 3-state, with 26-Ω series resistance - eliminates need for external series termination |
| VCC (Pins 7, 18, 31, 42) | Power supply | Four dedicated VCC pins reduce switching noise and improve PSRR; require local 0.01–0.1-μF bypass per pin |
| GND (Pins 4, 10, 15, 21, 28, 34, 39, 45) | Ground reference | Eight GND pins provide low-inductance return paths for all 16 outputs and internal logic |
Key Features
| Feature | Design Value |
|---|---|
| Wide VCC operating range | 1.65 V to 3.6 V - supports interoperability across 1.8-V, 2.5-V, and 3.3-V logic domains without voltage translation |
| 5.5-V tolerant inputs | Enables direct connection to 5-V legacy peripherals in mixed-voltage systems like server baseboard management controllers |
| Integrated 26-Ω series output resistors | Eliminates need for external series termination resistors, reducing BOM count and PCB area in high-speed bus interfaces |
| Ioff partial-power-down protection | Prevents back-current flow when VCC = 0 V, enabling safe live insertion into powered-backplane systems |
| Active bus-hold circuitry | Maintains stable logic state on unused inputs without external pullup/pulldown resistors - simplifies layout and improves reliability |
Applications
| Server Memory Address Buffering | PC Motherboard I/O Expansion |
|---|---|
Use Scenario: Driving memory address lines from a 3.3-V CPU to DDR SDRAM modules requiring clean, low-skew, terminated signals. IC Role / Device Role / Timing Role: Noninverting 16-bit buffer with 3-state control per 4-bit group, providing isolation and fanout amplification for address bus segments. Use Value: 26-Ω on-die series termination minimizes reflections on parallel address traces; 4.4-ns tpd meets tight setup/hold timing budgets. |
Use Scenario: Interfacing LPC or SPI peripheral controllers (3.3-V) to legacy Super I/O chips (5-V) on desktop/notebook motherboards. IC Role / Device Role / Timing Role: Voltage-level translator and bus isolator with independent OE control per 4-bit lane. Use Value: 5.5-V input tolerance allows direct 5-V signal acceptance; bus-hold prevents floating inputs during reset or suspend states. |
| Network Switch Control Plane | Industrial PLC Backplane Interface |
Use Scenario: Buffering configuration registers and status signals between FPGA-based switch fabric and management microcontrollers. IC Role / Device Role / Timing Role: 16-bit bidirectional-capable buffer (via OE sequencing) for control/status data transfer across voltage domains. Use Value: Ioff protection enables hot-swap capability in modular line cards; –40°C to +125°C rating supports fanless chassis operation. |
Use Scenario: Isolating field I/O module address/data buses from central controller in programmable logic controllers with mixed-voltage modules. IC Role / Device Role / Timing Role: Robust 3-state driver with ESD-hardened inputs (2000-V HBM) for noisy industrial environments. Use Value: Integrated bus-hold eliminates external biasing on unterminated backplane stubs; 125°C operation sustains reliability in enclosed enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-bit buffer/driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC16244ADGGR | Lacks bus-hold and Ioff; 3.6-V max VCC only; no 5.5-V input tolerance | Suitable only for pure 3.3-V systems with externally biased inputs and controlled power sequencing | Select when cost sensitivity outweighs mixed-voltage and hot-swap requirements |
| 74ALVCH162244TTR | Higher drive (±24 mA); 2.5-V to 3.6-V VCC only; no 5.5-V input tolerance | Targeted at high-speed 3.3-V-only applications where lower propagation delay (<3.5 ns) is critical | Select when driving heavy capacitive loads or ultra-low-latency timing is required |
Compared with SN74LVCH162244AGR, SN74LVC16244ADGGR omits bus-hold and Ioff-requiring external biasing and careful power sequencing-while 74ALVCH162244TTR trades mixed-voltage flexibility for higher speed and drive strength in 3.3-V-only designs.
Availability
SN74LVCH162244AGR is available at Aetrix Electronics and suitable for server memory subsystems, PC motherboard I/O expansion, and industrial PLC backplane interfaces requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for SN74LVCH162244AGR 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 company specializing in analog and embedded processing technologies, with leadership in logic, interface, and power management ICs for industrial, automotive, and communications markets.
The SN74LVCH162244AGR belongs to TI's Widebus™ family of advanced CMOS logic devices, engineered specifically to improve density and performance of 3-state memory address drivers, clock drivers, and bus-oriented receivers/transmitters in high-reliability systems.
FAQ
What is the maximum input voltage the SN74LVCH162244AGR can safely accept?
The SN74LVCH162244AGR accepts input voltages up to 5.5 V across its entire VCC operating range (1.65 V to 3.6 V). This overvoltage tolerance enables direct interfacing with 5-V logic without external level shifters, making it ideal for mixed-voltage system integration where the SN74LVCH162244AGR serves as a robust translation buffer.
Does the SN74LVCH162244AGR require external pullup resistors on its output-enable pins?
Yes - to ensure outputs remain in high-impedance state during power-up or power-down, each OE pin (1OE–4OE) should be tied to VCC through a pullup resistor. The minimum value depends on the driver's current-sinking capability; typical values range from 4.7 kΩ to 10 kΩ. This requirement is explicitly documented in the SN74LVCH162244AGR functional description for safe system initialization.
How does the bus-hold feature of the SN74LVCH162244AGR eliminate external resistors?
The SN74LVCH162244AGR integrates active bus-hold circuitry on all 16 input pins, providing ±75 μA holding current at VCC = 3.0 V to maintain valid logic states on undriven or floating inputs. Because this function is built-in, designers avoid adding external pullup or pulldown resistors - reducing BOM cost, PCB space, and potential signal integrity issues associated with discrete biasing networks in the SN74LVCH162244AGR implementation.
What thermal metrics apply to the SN74LVCH162244AGR in TSSOP-48 (DGG) package?
The SN74LVCH162244AGR in TSSOP-48 (DGG) package has RθJA = 64.3°C/W, RθJC(top) = 17.6°C/W, and RθJB = 31.5°C/W. These values reflect its thermal performance under JEDEC-standard board-mount conditions and are critical for calculating junction temperature rise in high-density layouts where multiple SN74LVCH162244AGR devices operate simultaneously near thermal limits.
Can the SN74LVCH162244AGR be used in hot-swap applications?
Yes - the SN74LVCH162244AGR includes Ioff circuitry that disables outputs and limits leakage to ±10 μA when VCC = 0 V, preventing damaging back-current flow during live insertion into powered backplanes. This feature, combined with 2000-V HBM ESD rating, makes the SN74LVCH162244AGR suitable for modular telecom and server systems requiring field-replaceable components.
SN74LVCH162244AGR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LVCH
- Package/Case:
- 48-TFSOP (0.240", 6.10mm Width)
- Packaging:
- Tape & Reel (TR)
- 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:
- 1.65V ~ 3.6V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-TSSOP
SN74LVCH162244AGR FAQ
1.How can I place an order for SN74LVCH162244AGR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LVCH162244AGR 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 SN74LVCH162244AGR reliable?
The price and inventory of SN74LVCH162244AGR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVCH162244AGR is usually 5 days.
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4.How is shipping managed for SN74LVCH162244AGR?
SN74LVCH162244AGR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LVCH162244AGR 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 SN74LVCH162244AGR?
For technical support, including SN74LVCH162244AGR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVCH162244AGR requirements.
6.How does Aetrix verify that SN74LVCH162244AGR is sourced from the original manufacturer or authorized distributors?
All SN74LVCH162244AGR 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 SN74LVCH162244AGR meets industry standards.
7.What is the process for return or replacement of SN74LVCH162244AGR?
All SN74LVCH162244AGR units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVCH162244AGR, 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 SN74LVCH162244AGR part is unused and in its original packaging.
Return procedure for SN74LVCH162244AGR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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