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Texas Instruments 74ALVCH16244ZQLR
- Part No.:
- 74ALVCH16244ZQLR
- Manufacturer:
- Texas Instruments
- Package:
- 56-VFBGA
- Datasheet:
-
74ALVCH16244ZQLR.pdf
- Description:
- IC BUFFER NON-INVERT 3.6V 56BGA
- Quantity:
- Payment:
- Shipping:
Inventory:4,314
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Product details
Overview
74ALVCH16244ZQLR from Texas Instruments is a 16-bit non-inverting buffer/driver with 3-state outputs, designed for 1.65-V to 3.6-V operation. It features ±24-mA output drive at 3.3 V, 3 ns max propagation delay, bus-hold circuitry eliminating external pullup/pulldown resistors, and operates across –40°C to 85°C. It serves as a high-density memory address or clock driver in space-constrained industrial control backplanes.
For engineers reviewing the 74ALVCH16244ZQLR datasheet, 74ALVCH16244ZQLR pinout, 74ALVCH16244ZQLR application, or 74ALVCH16244ZQLR equivalent, key selection considerations include its 56-ball VFBGA (ZQL) package, active-low 3-state enable architecture, bus-hold input stabilization, and compatibility with mixed-voltage 1.8-V/2.5-V/3.3-V system interfaces.
Technical Context
The 74ALVCH16244ZQLR implements four independent 4-bit buffer sections, each with symmetrical active-low output-enable (OE) inputs and true (non-inverting) outputs. Its bus-hold circuitry actively maintains valid logic states on undriven inputs without external components.
It supports flexible configuration as one 16-bit, two 8-bit, or four 4-bit buffers. The device ensures high-impedance state during power-up/down when OE is pulled up to VCC, and meets JESD 17 latch-up immunity (>250 mA) and JESD 22 ESD ratings (2000-V HBM, 200-V MM).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 1.65 V to 3.6 V - enables interoperability across 1.8-V, 2.5-V, and 3.3-V logic domains without level shifters. |
| Max Propagation Delay | 3 ns at 3.3 V - supports high-speed address/data buffering in DDR memory subsystems and FPGA I/O expansion. |
| Output Drive Strength | ±24 mA at 3.3 V - drives heavy capacitive loads (e.g., >15 pF traces or multiple CMOS inputs) without signal degradation. |
| Bus-Hold Current | ±75 µA at 3 V - actively sustains input logic state without external biasing, reducing BOM count and layout complexity. |
| Operating Temperature | –40°C to +85°C - qualified for industrial-grade embedded systems including programmable logic controllers and motor drives. |
| Input Capacitance | 6 pF - minimizes loading on upstream drivers, preserving signal integrity in high-frequency parallel buses. |
| Thermal Resistance θJA | 42 °C/W (ZQL package) - enables reliable operation at full drive strength in compact PCB layouts with limited airflow. |
Pinout & Package
VFBGA package: 56-ball, 0.5-mm pitch, 7.0 mm × 4.5 mm body, ZQL (Pb-free) variant. Ball grid organized in 11×6 array with corner pins A1/K1 designated for 1OE/4OE respectively.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1 | 1OE | Active-low enable for first 4-bit buffer section - must be pulled high via resistor to VCC for power-up safety. |
| B1–B2, C1–C2 | 1Y1–1Y4 | True buffered outputs of Section 1 - present high-impedance state when 1OE = high. |
| B5–B6, C5–C6 | 1A1–1A4 | Data inputs for Section 1 - internally terminated by bus-hold circuitry; no external resistors required. |
| C3–C4, D3–D4, G3–G4, H3–H4 | VCC | Four dedicated power pins - reduce IR drop and supply noise across 16-bit channel; require local 100-nF decoupling. |
| B3–B4, D3–D4, G5–G6, J3–J4 | GND | Six ground balls - provide low-inductance return paths for all 16 outputs, critical for EMI control in dense routing. |
| K1, K6 | 4OE, 3OE | Active-low enables for Sections 4 and 3 - independent control allows staggered bus activation to limit peak current draw. |
Key Features
| Feature | Design Value |
|---|---|
| Widebus™ architecture | Optimized pinout and die layout for minimal trace length in 16-bit parallel bus applications - reduces skew and crosstalk. |
| Bus-hold inputs | Eliminates need for 16 external pullup/pulldown resistors - saves ~32 mm² PCB area and simplifies BOM management. |
| ±24-mA drive @ 3.3 V | Drives 15-pF load with <3 ns delay - supports 33-MHz clock distribution or fast address latching in microcontroller peripherals. |
| Low dynamic current | ΔICC = 750 µA per switching input - enables use in low-power industrial sensors without compromising speed. |
| JESD 17 latch-up immunity | >250 mA - ensures robustness against transient overvoltage events in noisy factory-floor environments. |
Applications
| Memory Address Buffering | FPGA I/O Expansion |
|---|---|
|
Use Scenario: Driving 16-bit address lines from an MCU to SRAM or Flash memory in a compact industrial HMI panel. IC Role / Device Role: Non-inverting 3-state buffer isolating MCU address bus from memory load; OE controlled by chip-select logic. Use Value: Bus-hold prevents floating address lines during reset, avoiding spurious memory accesses; ±24-mA drive ensures clean edges across 8-cm PCB traces. |
Use Scenario: Extending I/O count of a Xilinx Spartan FPGA to interface with legacy parallel LCD and keypad modules. IC Role / Device Role: Level-translating buffer between 3.3-V FPGA bank and 2.5-V peripheral logic, leveraging 1.65–3.6-V VCC range. Use Value: Eliminates discrete level shifters; 3 ns tpd preserves timing margin for 25-MHz pixel clock synchronization. |
| Programmable Logic Controller Backplane | Digital Audio Clock Distribution |
|
Use Scenario: Fan-out of 16-bit data bus across modular I/O slots in a DIN-rail mounted PLC chassis. IC Role / Device Role: High-drive buffer enabling simultaneous read/write to multiple slot registers; OE sequenced per slot access. Use Value: 42 °C/W θJA allows full-load operation in 70°C ambient; latch-up immunity withstands field-induced transients on long backplane traces. |
Use Scenario: Distributing master clock and frame-sync signals from a DSP to eight audio CODECs in a pro-audio mixer. IC Role / Device Role: Low-skew 16-bit clock driver with matched trace-length routing support via symmetrical pinout. Use Value: 3 ns max tpd variation across all 16 outputs ensures <100-ps inter-channel skew - critical for TDM audio sample alignment. |
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 | Lower drive (±24 mA only at 3.3 V; drops to ±12 mA at 2.5 V), no bus-hold, 48-pin TSSOP package. | Requires external pullups for unused inputs; unsuitable for hot-swap or floating-bus scenarios. | Select when cost-sensitive, board space permits TSSOP, and system guarantees driven inputs. |
| 74AVCH16244DGGR | Higher speed (2.2 ns tpd at 3.3 V), same bus-hold and voltage range, but rated only to 125°C and uses different process. | Better suited for automotive under-hood applications; not recommended for industrial use where long-term 85°C reliability is prioritized. | Choose for extended temperature needs or tighter timing budgets; verify qualification reports for continuous 85°C operation. |
Compared with SN74LVC16244ADGGR, the 74ALVCH16244ZQLR adds bus-hold and fits in smaller PCB area via BGA; versus 74AVCH16244DGGR, it trades minor speed loss for proven industrial lifecycle stability and identical functional behavior at 85°C.
Availability
74ALVCH16244ZQLR is available at Aetrix Electronics and suitable for industrial control backplanes, FPGA I/O expansion, memory subsystems, and digital audio clock distribution requiring stable component supply and Pb-free compliance.
Supply support for 74ALVCH16244ZQLR 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 experience in industrial and automotive-grade IC design.
The ALVCH logic family targets high-speed, low-voltage, 3-state bus interface applications - specifically engineered for density, noise immunity, and mixed-voltage system integration in programmable logic and microcontroller-based platforms.
FAQ
What is the correct power-up sequencing requirement for 74ALVCH16244ZQLR?
The 74ALVCH16244ZQLR requires output-enable (OE) inputs to be held high (via pullup to VCC) during power-up to guarantee high-impedance outputs. This prevents bus contention before system initialization completes. TI recommends a minimum 10-kΩ pullup resistor on each OE line, sized to sink less than the driver's IOH rating at VCC min (1.65 V). Failure to do so may cause undefined output states and downstream logic faults.
Does 74ALVCH16244ZQLR support mixed-voltage operation between input and output sides?
No - the 74ALVCH16244ZQLR is a single-supply device: all inputs and outputs reference the same VCC (1.65 V to 3.6 V). It does not provide level-shifting functionality. For mixed-voltage interfacing (e.g., 1.8-V MCU to 3.3-V peripheral), external level translators or careful voltage-margin validation per VIH/VIL specs at the target VCC is required. The bus-hold feature operates only within the applied VCC range.
Can bus-hold circuitry in 74ALVCH16244ZQLR be disabled?
No - bus-hold is permanently enabled on all data inputs (A1–A16) and cannot be disabled via configuration or external control. TI explicitly warns against using pullup/pulldown resistors with bus-hold inputs, as they conflict and may cause excessive current draw or logic instability. Unused inputs should be left unconnected - the internal circuitry will maintain a valid logic level.
What is the maximum capacitive load the 74ALVCH16244ZQLR can drive while maintaining 3 ns propagation delay?
At VCC = 3.3 V and TA = 25°C, the 74ALVCH16244ZQLR maintains ≤3 ns tpd driving a 30-pF load (per TI test condition in SCES014K). With 50-pF load, typical tpd increases to 3.6 ns. For designs requiring strict 3 ns budget, keep total net capacitance (trace + pin + load) ≤30 pF - achievable with short (<4 cm), 5-mil traces over solid ground plane and minimal fanout.
Is 74ALVCH16244ZQLR pin-compatible with other packages of the same part number?
No - the 74ALVCH16244ZQLR (56-ball VFBGA, ZQL) has no pin-to-pin compatibility with SSOP (DL), TSSOP (DGG), or TVSOP (DGV) variants. Pin assignments differ significantly: ZQL uses ball-grid mapping with dedicated VCC/GND pairs, while DGG/DL use linear 48-pin layouts. PCB redesign and layout revalidation are mandatory when migrating to or from the ZQL package.
74ALVCH16244ZQLR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ALVCH
- Package/Case:
- 56-VFBGA
- 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:
- 1.65V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 56-BGA Microstar Junior (7x4.5)
74ALVCH16244ZQLR FAQ
1.How can I place an order for 74ALVCH16244ZQLR through Aetrix?
Please submit a Request for Quotation (RFQ) for 74ALVCH16244ZQLR 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 74ALVCH16244ZQLR reliable?
The price and inventory of 74ALVCH16244ZQLR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74ALVCH16244ZQLR is usually 5 days.
3.What payment methods are accepted for 74ALVCH16244ZQLR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74ALVCH16244ZQLR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74ALVCH16244ZQLR?
74ALVCH16244ZQLR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74ALVCH16244ZQLR 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 74ALVCH16244ZQLR?
For technical support, including 74ALVCH16244ZQLR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74ALVCH16244ZQLR requirements.
6.How does Aetrix verify that 74ALVCH16244ZQLR is sourced from the original manufacturer or authorized distributors?
All 74ALVCH16244ZQLR 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 74ALVCH16244ZQLR meets industry standards.
7.What is the process for return or replacement of 74ALVCH16244ZQLR?
All 74ALVCH16244ZQLR units undergo pre-shipment inspection (PSI). If there is an issue with 74ALVCH16244ZQLR, 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 74ALVCH16244ZQLR part is unused and in its original packaging.
Return procedure for 74ALVCH16244ZQLR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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