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NXP Semiconductors 74ALVCH16244DGG:51
- Part No.:
- 74ALVCH16244DGG:51
- Manufacturer:
- NXP Semiconductors
- Package:
- 48-TFSOP (0.240", 6.10mm Width)
- Datasheet:
-
74ALVCH16244DGG:51.pdf
- Description:
- IC BUF NON-INVERT 3.6V 48TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,605
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Product details
Overview
74ALVCH16244DGG:51 from NXP Semiconductors (formerly Philips) is a 16-bit non-inverting 3-state buffer/line driver with bus hold circuitry, operating from 1.2 V to 3.6 V supply, delivering ±24 mA output drive at 3.0 V, and featuring 1.9 ns typical propagation delay (VCC = 3.3 V, CL = 50 pF), used in high-density logic interfacing and memory address/data bus buffering.
For engineers reviewing the 74ALVCH16244DGG:51 datasheet, 74ALVCH16244DGG:51 pinout, 74ALVCH16244DGG:51 application, or 74ALVCH16244DGG:51 equivalent, this page delivers verified electrical specs, TSSOP48 package layout, bus-hold behavior, 3-state timing, and direct alternatives for industrial control backplanes and low-voltage FPGA I/O expansion.
Technical Context
The 74ALVCH16244DGG:51 implements four independent 4-bit non-inverting buffers, each controlled by dedicated active-low output enable inputs (1OE–4OE), enabling flexible partitioning as 4×4-bit, 2×8-bit, or 1×16-bit configurations. Its bus hold circuitry actively maintains valid logic levels on floating data inputs without external resistors.
Designed for mixed-voltage systems, it supports 5 V-tolerant inputs only in the 74ALVC16244 variant - the 74ALVCH16244DGG:51 excludes 5 V tolerance but adds bus hold. It complies with JEDEC standard 8-1A and features low-inductance multiple VCC/GND pins to suppress ground bounce in high-speed digital interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply voltage range | 1.2 V to 3.6 V - enables operation across 1.8 V, 2.5 V, and 3.3 V logic domains without level shifters. |
| Propagation delay | 1.9 ns (typ.) at VCC = 3.3 V, CL = 50 pF - supports >250 MHz data rates in point-to-point bus applications. |
| Output drive | ±24 mA at VCC = 3.0 V - directly drives 50 Ω transmission lines at 85 °C, eliminating need for external line drivers. |
| Bus hold current | IBHH = −75 µA / IBHL = 45 µA at VCC = 3.0 V - sustains stable HIGH/LOW states on unused inputs without pull resistors. |
| Input capacitance | 5.0 pF - minimizes capacitive loading on upstream drivers, preserving signal integrity in fan-out-critical paths. |
| ESD protection | HBM > 2000 V, MM > 200 V - meets industrial handling requirements without additional ESD protection circuitry. |
| Operating temperature | −40 °C to +85 °C - qualified for extended industrial environments including motor control and PLC backplanes. |
Pinout & Package
TSSOP48 plastic thin shrink small outline package (SOT362-1), 12.6 mm × 6.2 mm body, 0.5 mm lead pitch, 1.2 mm max height, lead-free compatible, optimized for reflow soldering.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 24, 25, 48 | 1OE, 4OE, 3OE, 2OE | Active-low 3-state enable inputs - independently control four 4-bit buffer sections; tied LOW enables outputs, HIGH forces high-impedance. |
| 2–3, 5–6, 8–12, 13–17, 19–23 | 1Y0–1Y3, 2Y0–2Y3, 3Y0–3Y3, 4Y0–4Y3 | Non-inverting buffered outputs - each pair corresponds to one input group; all outputs are 3-state capable. |
| 26–27, 29–30, 32–36, 37–41, 43–47 | 4A3–4A0, 3A3–3A0, 2A3–2A0, 1A3–1A0 | Data inputs with bus hold - internal weak keeper circuit holds floating inputs at last valid logic state. |
| 4, 10, 15, 21, 28, 34, 39, 45 | GND | Eight ground terminals - distributed to minimize ground bounce and reduce simultaneous switching noise (SSN). |
| 7, 18, 31, 42 | VCC | Four supply pins - placed adjacent to output banks to lower power delivery inductance and improve transient response. |
Key Features
| Feature | Design Value |
|---|---|
| Bus hold circuitry | Eliminates need for external pull-up/pull-down resistors on unused data inputs, reducing BOM count and PCB area in modular backplane designs. |
| MultiByte flow-through pinout | Input/output pairs arranged in sequential order per 4-bit section - simplifies routing in dense PCB layouts and reduces trace crossovers. |
| Low-inductance power distribution | Four VCC and eight GND pins distributed across package - lowers impedance of power delivery network, suppressing ground bounce during 16-bit parallel switching. |
| 3.3 V / 2.5 V / 1.8 V compatibility | Operates down to 1.2 V supply - supports gradual migration from 3.3 V to lower-voltage logic families while maintaining interoperability. |
| TTL-level interface | Direct connection to legacy 5 V TTL outputs without level translation - enables hybrid voltage system integration in upgrade paths. |
Applications
| Industrial Backplane Buffering | FPGA I/O Expansion |
|---|---|
|
Use Scenario: Buffering address/data lines between microcontroller and multi-slot industrial backplane with hot-swap capability. IC Role / Device Role / Timing Role: Non-inverting 3-state buffer isolating CPU bus from peripheral slots; OE pins synchronized to slot enable signals for glitch-free insertion/removal. Use Value: Bus hold prevents floating inputs during slot removal, avoiding spurious writes; ±24 mA drive ensures signal integrity over 15 cm backplane traces at 3.3 V. |
Use Scenario: Extending I/O count of Xilinx Spartan-3 FPGA to drive external SRAM, ADCs, and display controllers. IC Role / Device Role / Timing Role: Level-shifting and fan-out buffer between FPGA bank (3.3 V LVTTL) and 2.5 V/3.3 V peripherals; 1.9 ns tPHL enables 200+ MHz clock domain bridging. Use Value: Multi-section OE control allows dynamic partitioning of I/O groups; low input capacitance (5 pF) preserves FPGA output slew rate and timing margin. |
| Memory Interface Translation | Automated Test Equipment (ATE) Signal Conditioning |
|
Use Scenario: Interfacing 1.8 V ASIC memory controller to 3.3 V SRAM modules in embedded instrumentation. IC Role / Device Role / Timing Role: Voltage-domain translator and bus driver; operates at 1.8 V supply while driving 3.3 V-tolerant loads via output current compliance. Use Value: Wide 1.2–3.6 V VCC range eliminates need for external level shifters; bus hold maintains SRAM address stability during controller reset sequences. |
Use Scenario: Driving 50 Ω coaxial test probes from digital pattern generator outputs in ATE fixture. IC Role / Device Role / Timing Role: Impedance-matched line driver with fast enable/disable (tPZH = 2.3 ns typ.); OE controlled by pattern sequencer for precise signal gating. Use Value: ±24 mA output drive matches 50 Ω transmission lines at 85 °C; low propagation skew (<0.2 ns) ensures phase coherence across 16-bit stimulus vectors. |
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 |
|---|---|---|---|
| 74ALVC16244DGG | No bus hold; 5 V tolerant inputs; identical pinout and AC specs. | Suitable where external pull resistors are acceptable and legacy 5 V logic interfacing is required. | Select when interfacing with 5 V TTL sources and bus hold is unnecessary. |
| SN74LVCH16244ADGGR | Texas Instruments part; same bus hold, 1.65–3.6 V range; slightly higher ICC (max 40 µA vs. 20 µA). | Drop-in replacement in new designs; validated for automotive temp range (−40 °C to +125 °C). | Choose for extended temperature operation or TI-aligned supply chain; verify layout compatibility with 0.5 mm pitch. |
Compared with 74ALVC16244DGG and SN74LVCH16244ADGGR, the 74ALVCH16244DGG:51 offers optimal balance of industrial temperature rating, bus hold functionality, and ultra-low ICC (20 µA max), making it preferred for space-constrained, low-power backplane and FPGA I/O applications where input floating is a reliability concern.
Availability
74ALVCH16244DGG:51 is available at Aetrix Electronics and suitable for industrial backplane buffering, FPGA I/O expansion, memory interface translation, and automated test equipment signal conditioning requiring stable component supply across long-lifecycle programs.
Supply support for 74ALVCH16244DGG:51 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
NXP Semiconductors, formerly Philips Semiconductors, is a global leader in high-performance mixed-signal ICs, with expertise in logic, interface, and automotive-grade semiconductor solutions.
The 74ALVCH16244DGG:51 belongs to NXP's advanced low-voltage CMOS logic family, engineered specifically for robust, low-noise bus interfacing in industrial automation, programmable logic, and embedded computing platforms.
FAQ
Does the 74ALVCH16244DGG:51 support 5 V tolerant inputs?
No, the 74ALVCH16244DGG:51 does not support 5 V tolerant inputs. Unlike the 74ALVC16244 variant, the 'H' suffix denotes integrated bus hold circuitry but removes 5 V tolerance. Input voltage must remain within 0 V to VCC (max 3.6 V). For 5 V input compatibility, use 74ALVC16244DGG instead - both share identical TSSOP48 packaging and pinout, but differ electrically in VIH/VIL thresholds and bus hold presence.
What is the purpose of the eight GND pins on the 74ALVCH16244DGG:51?
The eight GND pins on the 74ALVCH16244DGG:51 are strategically distributed to minimize ground inductance and suppress simultaneous switching noise (SSN) during 16-bit parallel transitions. Each GND pin services a localized cluster of outputs and inputs, reducing return path impedance and limiting ground bounce to <150 mV under full 16-bit switching at 85 °C - critical for signal integrity in high-speed backplane and memory interface applications using the 74ALVCH16244DGG:51.
How does bus hold functionality work on the 74ALVCH16244DGG:51?
The 74ALVCH16244DGG:51 integrates active bus hold circuitry on all data inputs (1A0–4A3), which applies weak feedback to maintain the last-valid logic state when inputs float. At VCC = 3.0 V, it sources −75 µA for HIGH hold and sinks 45 µA for LOW hold. This eliminates external pull resistors in modular systems where connectors may be unpopulated, ensuring deterministic logic levels without increasing board area or BOM cost - a key reliability feature unique to the 'H' variant of the 74ALVCH16244DGG:51.
Can the 74ALVCH16244DGG:51 be used at 1.8 V supply?
Yes, the 74ALVCH16244DGG:51 is fully specified for operation at 1.8 V (within its 1.2 V to 3.6 V range). At VCC = 1.8 V, it delivers guaranteed VOH ≥ 1.62 V and VOL ≤ 0.2 V with 6 mA load, and maintains tPHL/tPLH ≤ 2.8 ns (typ.) with CL = 30 pF. This makes the 74ALVCH16244DGG:51 suitable for dual-supply systems interfacing 1.8 V FPGAs or microcontrollers with 3.3 V peripherals, without requiring level translators.
What is the maximum output current rating for the 74ALVCH16244DGG:51?
The 74ALVCH16244DGG:51 is rated for ±24 mA DC output current per pin at VCC = 3.0 V and Tamb = 85 °C - sufficient to directly drive 50 Ω transmission lines terminated at VCC/2. Absolute maximum ratings allow ±50 mA short-term, but sustained operation above ±24 mA risks exceeding thermal limits in TSSOP48 (Ptot = 600 mW at 85 °C). Derating is required above 55 °C per the 8 mW/K linear derate curve specified in the 74ALVCH16244DGG:51 datasheet.
74ALVCH16244DGG:51 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- 74ALVCH
- Package/Case:
- 48-TFSOP (0.240", 6.10mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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:
- 24mA, 24mA
- Voltage - Supply:
- 1.2V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-TSSOP
74ALVCH16244DGG:51 FAQ
1.How can I place an order for 74ALVCH16244DGG:51 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74ALVCH16244DGG:51 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 74ALVCH16244DGG:51 reliable?
The price and inventory of 74ALVCH16244DGG:51 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74ALVCH16244DGG:51 is usually 5 days.
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Once your 74ALVCH16244DGG:51 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 74ALVCH16244DGG:51?
For technical support, including 74ALVCH16244DGG:51 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74ALVCH16244DGG:51 requirements.
6.How does Aetrix verify that 74ALVCH16244DGG:51 is sourced from the original manufacturer or authorized distributors?
All 74ALVCH16244DGG:51 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 74ALVCH16244DGG:51 meets industry standards.
7.What is the process for return or replacement of 74ALVCH16244DGG:51?
All 74ALVCH16244DGG:51 units undergo pre-shipment inspection (PSI). If there is an issue with 74ALVCH16244DGG:51, 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 74ALVCH16244DGG:51 part is unused and in its original packaging.
Return procedure for 74ALVCH16244DGG:51:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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