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Texas Instruments SN74ALVCH162244DLR
- Part No.:
- SN74ALVCH162244DLR
- Manufacturer:
- Texas Instruments
- Package:
- 48-BSSOP (0.295", 7.50mm Width)
- Datasheet:
-
SN74ALVCH162244DLR.pdf
- Description:
- IC BUF NON-INVERT 3.6V 48SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,182
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Product details
Overview
SN74ALVCH162244DLR from Texas Instruments is a 16-bit non-inverting 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, bus-hold circuitry on all data inputs, and integrated 26-Ω series output resistors to suppress overshoot/undershoot - used in memory address buffering, clock distribution, and high-density bus interfacing.
For engineers reviewing the SN74ALVCH162244DLR datasheet, SN74ALVCH162244DLR pinout, SN74ALVCH162244DLR application, or SN74ALVCH162244DLR equivalent, key selection criteria include VCC range compatibility (1.65–3.6 V), 3-state timing (ten = 5.6 ns at 3.3 V), bus-hold input retention, and SSOP-48 package thermal performance (θJA = 94°C/W).
Technical Context
This device implements true (non-inverting) logic buffering across 16 channels, partitioned into four 4-bit groups, each with dedicated OE control (1OE–4OE). Each output drives up to ±12 mA and includes built-in 26-Ω series termination to minimize signal integrity issues without external components.
Bus-hold circuitry actively maintains valid logic levels on unused or floating inputs, eliminating need for external pullup/pulldown resistors. The design ensures high-impedance state during power-up/down when OE is pulled high via external resistor - critical for hot-swap and partial-power-down systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 1.65 V to 3.6 V - supports mixed-voltage system interfacing between 1.8-V, 2.5-V, and 3.3-V domains. |
| Output Drive | ±12 mA per output - sufficient to drive standard CMOS loads and moderate PCB trace capacitance. |
| Bus-Hold Current | ±25 µA to ±75 µA (VCC-dependent) - actively retains input state without external biasing. |
| Propagation Delay | 4.2 ns (typ, VCC = 2.5 V) - enables high-speed address/data buffering in memory subsystems. |
| Enable Time (ten) | 5.6 ns (max, VCC = 3.3 V) - fast output activation for dynamic bus arbitration. |
| Disable Time (tdis) | 5.5 ns (max, VCC = 3.3 V) - rapid transition to high-Z prevents bus contention. |
| Input Capacitance | 6 pF per data input - low loading preserves signal edge rate in fan-out-heavy configurations. |
| Thermal Resistance | θJA = 94°C/W (DL package) - defines maximum power dissipation under natural convection cooling. |
Pinout & Package
SN74ALVCH162244DLR uses a 48-pin Shrink Small-Outline Package (SSOP-DL), 12.6 mm × 6.2 mm body, 0.5-mm lead pitch, 1.2-mm max height, RoHS-compliant NiPdAu lead finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OE–4OE | Active-low output-enable control | Each enables/disables one 4-bit output group; tied high via pullup for safe power-up high-Z state. |
| 1A1–4A4 | Data inputs (16 total) | True-input terminals with bus-hold; tolerate floating states without external biasing. |
| 1Y1–4Y4 | 3-state buffered outputs (16 total) | Non-inverting outputs with integrated 26-Ω series resistance - reduces EMI and eliminates need for discrete termination. |
| VCC (Pins 7, 24, 31, 48) | Power supply | Four distributed VCC pins minimize IR drop and improve noise immunity across wide bus. |
| GND (Pins 4, 10, 15, 20, 27, 34, 41, 45) | Ground reference | Eight GND pins provide low-inductance return paths for all 16 drivers and internal logic. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 26-Ω output series resistors | Eliminates external termination components, reduces PCB area, and improves signal integrity on stub-loaded buses. |
| Bus-hold on all data inputs | Maintains last-valid logic state on un-driven or unterminated inputs - removes need for 10-kΩ pullup/pulldown resistors. |
| Wide VCC range (1.65–3.6 V) | Enables direct interface between 1.8-V microcontrollers and 3.3-V peripherals without level shifters. |
| Low dynamic current increase (∆ICC = 750 µA) | Minimizes supply noise during input transitions - critical for noise-sensitive analog/mixed-signal systems. |
| ESD protection >2000 V (HBM) | Robust handling during board assembly and field service without additional protection circuitry. |
Applications
| Memory Address Buffering | Clock Distribution Network |
|---|---|
Use Scenario: Driving 16-bit address lines from an FPGA or microcontroller to multiple SRAM/Flash devices on a shared bus. IC Role / Device Role / Timing Role: Non-inverting 3-state buffer providing isolation, fan-out expansion, and bus contention control during multi-device access. Use Value: Integrated bus-hold prevents address glitches during idle cycles; 26-Ω output resistors suppress ringing on long traces. | Use Scenario: Distributing a single system clock to multiple synchronous peripherals (ADCs, DACs, FPGAs) with matched skew. IC Role / Device Role / Timing Role: Low-skew, low-jitter buffer replicating clock signals while maintaining signal integrity across varying load capacitances. Use Value: 4.2-ns propagation delay and 5.5-ns disable time enable precise timing margin control in high-speed sampling systems. |
| Hot-Swappable I/O Expansion | Industrial Backplane Interface |
Use Scenario: Enabling/disabling peripheral modules (e.g., sensor cards) in a modular PLC rack without powering down the main controller. IC Role / Device Role / Timing Role: 3-state driver isolating module-specific data/address lines from the backplane during insertion/removal. Use Value: OE-controlled high-Z state prevents bus contention; bus-hold retains last valid state during hot-plug transients. | Use Scenario: Interfacing a 32-bit CPU local bus to a 16-bit industrial backplane with voltage translation and noise isolation. IC Role / Device Role / Timing Role: Bidirectional-capable buffer section (with external direction control) managing data flow between mismatched bus widths and voltage domains. Use Value: 1.65–3.6-V operation bridges 1.8-V CPU I/O and 3.3-V backplane; 94°C/W θJA supports convection-cooled enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-bit 3-state buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74ALVCH162244DGGR | TSSOP-48 (DGG) package; θJA = 89°C/W; same electrical specs and pinout. | Better thermal performance and smaller footprint; suited for space-constrained, higher-power-density layouts. | Select DGGR when board real estate or thermal headroom is constrained; DL and DGG are functionally identical but not mechanically interchangeable. |
| SN74LVCH162244ADLR | Lower drive strength (±8 mA); wider VCC range (1.65–5.5 V); same bus-hold and 3-state architecture. | Supports legacy 5-V peripherals; reduced output current limits maximum trace length and fan-out. | Choose LVCH162244A for mixed 3.3-V/5-V systems where full ±12-mA drive is unnecessary and 5-V tolerance is required. |
Compared with SN74ALVCH162244DGGR, the SN74ALVCH162244DLR offers lower cost per unit in tape-and-reel and slightly higher thermal resistance - optimal for cost-sensitive, thermally manageable industrial boards. Versus SN74LVCH162244ADLR, it delivers higher drive capability and tighter timing but lacks 5-V tolerance, making it ideal for modern 1.8-/2.5-/3.3-V-only designs.
Availability
SN74ALVCH162244DLR is available at Aetrix Electronics and suitable for memory address buffering, clock distribution networks, and industrial backplane interfaces requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for SN74ALVCH162244DLR 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 expertise in high-reliability interface ICs.
The SN74ALVCH162244 belongs to TI's Widebus™ family of advanced logic devices, engineered specifically to enhance density and performance in 3-state memory address drivers, clock trees, and bus-oriented receivers/transmitters.
FAQ
What is the recommended pullup resistor value for OE pins on SN74ALVCH162244DLR during power-up?
The minimum pullup resistor value for OE pins on SN74ALVCH162244DLR is determined by the current-sinking capability of the driving source. TI recommends tying OE to VCC through a resistor sized to ensure the pin remains above VIH (e.g., ≥2.0 V at VCC = 3.3 V) while accounting for any leakage or sink current - typically 4.7 kΩ to 10 kΩ for standard CMOS drivers. This guarantees high-impedance output state at power-on.
Does SN74ALVCH162244DLR support hot-swap operation, and how is bus contention avoided?
Yes, SN74ALVCH162244DLR supports hot-swap operation via its 3-state outputs and bus-hold inputs. Bus contention is avoided by holding OE high (via pullup) during insertion to maintain outputs in high-Z, while bus-hold circuitry retains valid logic levels on floating inputs - preventing undefined states that could cause contention on shared address or data lines.
Can SN74ALVCH162244DLR be used to drive transmission lines, and what termination strategy does it employ?
Yes, SN74ALVCH162244DLR is designed to drive controlled-impedance traces. It employs integrated 26-Ω series output resistors - matched to typical PCB trace impedances - which dampen reflections and reduce overshoot/undershoot without requiring external resistors, simplifying layout and improving signal fidelity on stub-loaded or point-to-multipoint buses.
What is the maximum operating temperature range specified for SN74ALVCH162244DLR, and is it suitable for industrial environments?
SN74ALVCH162244DLR is characterized for operation from –40°C to +85°C, meeting standard industrial temperature requirements. Its SSOP-DL package (θJA = 94°C/W), robust ESD protection (>2000 V HBM), and latch-up immunity (>250 mA) make it suitable for deployment in industrial control panels, factory automation equipment, and outdoor-rated embedded systems.
How does bus-hold functionality work on SN74ALVCH162244DLR, and what current does it draw?
Bus-hold on SN74ALVCH162244DLR uses weak feedback transistors to retain the last-valid logic state on each data input. It draws ±25 µA to ±75 µA depending on VCC and input voltage - sufficient to override noise but low enough to avoid loading driven sources. This eliminates external pullup/pulldown resistors while ensuring deterministic behavior during idle or disconnected states.
SN74ALVCH162244DLR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ALVCH
- Package/Case:
- 48-BSSOP (0.295", 7.50mm 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 ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-SSOP
SN74ALVCH162244DLR FAQ
1.How can I place an order for SN74ALVCH162244DLR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74ALVCH162244DLR 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 SN74ALVCH162244DLR reliable?
The price and inventory of SN74ALVCH162244DLR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ALVCH162244DLR is usually 5 days.
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SN74ALVCH162244DLR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74ALVCH162244DLR 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 SN74ALVCH162244DLR?
For technical support, including SN74ALVCH162244DLR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ALVCH162244DLR requirements.
6.How does Aetrix verify that SN74ALVCH162244DLR is sourced from the original manufacturer or authorized distributors?
All SN74ALVCH162244DLR 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 SN74ALVCH162244DLR meets industry standards.
7.What is the process for return or replacement of SN74ALVCH162244DLR?
All SN74ALVCH162244DLR units undergo pre-shipment inspection (PSI). If there is an issue with SN74ALVCH162244DLR, 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 SN74ALVCH162244DLR part is unused and in its original packaging.
Return procedure for SN74ALVCH162244DLR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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