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Texas Instruments 74ALVCH16244GRDR
- Part No.:
- 74ALVCH16244GRDR
- Manufacturer:
- Texas Instruments
- Package:
- 54-TFBGA
- Datasheet:
-
74ALVCH16244GRDR.pdf
- Description:
- IC BUFFER NON-INVERT 3.6V 54BGA
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
74ALVCH16244GRDR from Texas Instruments is a 16-bit non-inverting 3-state buffer/driver IC operating from 1.65 V to 3.6 V, delivering ±24-mA output drive at 3 V, with 3 ns max propagation delay at 3.3 V, and integrated bus-hold circuitry eliminating external pullup/pulldown resistors - used in memory address buffering, clock distribution, and high-density bus interfacing.
For engineers reviewing the 74ALVCH16244GRDR datasheet, 74ALVCH16244GRDR pinout, 74ALVCH16244GRDR application, or 74ALVCH16244GRDR equivalent, key selection considerations include its 54-ball GRD microStar Junior BGA package, 1.65–3.6 V supply compatibility, bus-hold input stabilization, 3-state output control per 4-bit group, and latch-up immunity exceeding 250 mA per JESD 17.
Technical Context
The 74ALVCH16244GRDR implements four independent 4-bit non-inverting buffers, each with dedicated active-low output-enable (OE) inputs (1OE–4OE), enabling flexible partitioning as one 16-bit, two 8-bit, or four 4-bit drivers. Its bus-hold circuitry actively maintains valid logic states on undriven inputs without external resistors.
All outputs are 3-state capable with symmetrical drive strength (±24 mA at 3 V), and the device features robust ESD protection (2000-V HBM, 200-V MM) and latch-up immunity compliant with JESD 17. Power-up/down high-impedance integrity requires OE tied to VCC via a pullup resistor.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.65 V to 3.6 V - supports mixed-voltage system interfacing across 1.8 V, 2.5 V, and 3.3 V domains. |
| Max Propagation Delay | 3 ns at VCC = 3.3 V - enables high-speed address/data path buffering in DDR and legacy parallel bus systems. |
| Output Drive Strength | ±24 mA at VCC = 3 V - drives heavy capacitive loads (e.g., >10 pF traces + multiple CMOS inputs) without signal degradation. |
| Bus-Hold Current | ±75 µA at VCC = 3 V - actively holds floating inputs at valid logic levels, removing need for 10-kΩ external bias resistors. |
| Input Voltage Thresholds | VIL = 0.8 V, VIH = 2.0 V at VCC = 3.3 V - ensures reliable TTL- and CMOS-compatible logic level recognition. |
| Thermal Impedance (θJA) | 36 °C/W - optimized for compact BGA layout with adequate PCB copper pour for thermal management in industrial ambient. |
| Operating Temperature | –40°C to +85°C - qualified for extended industrial temperature operation in embedded controllers and telecom line cards. |
Pinout & Package
74ALVCH16244GRDR uses a 54-ball microStar Junior BGA package (GRD footprint), 5.5 mm × 6.3 mm, 0.5-mm pitch, JEDEC MO-194 compliant, with 4 ground balls and 4 VCC balls distributed for low-noise power delivery.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1Y1–1Y4, 2Y1–2Y4, 3Y1–3Y4, 4Y1–4Y4 | True buffered outputs | 16 total non-inverting outputs, each independently 3-state controlled by corresponding OE signal. |
| 1A1–1A4, 2A1–2A4, 3A1–3A4, 4A1–4A4 | Data inputs | 16 inputs with bus-hold circuitry - no external termination required for unused or unterminated lines. |
| 1OE, 2OE, 3OE, 4OE | Active-low output-enable | Four independent enables - allows dynamic segmentation of 16-bit bus into 4×4-bit isolated zones. |
| VCC (pins A3, A4, C3, C4, G3, G4, H3, H4) | Power supply | Eight dedicated VCC connections minimize IR drop and supply noise across high-speed switching. |
| GND (pins B3, B4, D3, D4, E3, E4, F3, F4, J3, J4) | Ground reference | Ten GND balls provide low-inductance return paths critical for signal integrity at >100 MHz edge rates. |
| NC (pins A2, A5, A6, B1, B5, B6, C1, C2, C5, C6, D1, D2, D5, D6, E1, E2, E5, E6, F1, F2, F5, F6, G1, G2, G5, G6, H1, H2, H5, H6, J1, J2, J5, J6, K1–K6) | No internal connection | 33 NC balls - mechanical alignment aids and routing clearance; must be left unconnected or grounded per PCB design rules. |
Key Features
| Feature | Design Value |
|---|---|
| Widebus™ architecture | Optimized pinout and die layout for minimal trace skew and matched propagation delays across all 16 channels. |
| Bus-hold inputs | Eliminates 16 external pullup/pulldown resistors - reduces BOM count, PCB area, and assembly cost in space-constrained modules. |
| ±24-mA drive at 3 V | Drives up to 10 standard CMOS loads (50 pF) while maintaining <1 V VOL and <2 V VOH margins under worst-case timing. |
| Latch-up immunity >250 mA | Guarantees robust operation during transient overvoltage events on I/O lines in noisy industrial environments. |
| 3.3-V/2.5-V/1.8-V compatible | Enables seamless integration into multi-rail systems without level shifters - simplifies voltage domain bridging in FPGA/CPU interface designs. |
Applications
| Memory Address Buffering | Clock Distribution Network |
|---|---|
Use Scenario: Driving 16-bit address bus from an FPGA to multiple SRAM or Flash devices on a dense PCB with >8 cm trace length. IC Role / Device Role / Timing Role: Non-inverting 3-state buffer providing fanout, noise margin enhancement, and bus isolation during memory access arbitration. Use Value: 3 ns tpd and ±24-mA drive ensure setup/hold timing closure across full temperature range without added delay compensation. |
Use Scenario: Distributing a 50-MHz system clock to four synchronous peripherals (ADC, DAC, UART, GPIO expander) with matched skew. IC Role / Device Role / Timing Role: Low-skew, high-drive clock buffer with independent enable controls for dynamic clock gating per peripheral. Use Value: Bus-hold prevents floating clock inputs during power sequencing; 36 °C/W θJA enables stable operation in sealed enclosures. |
| Industrial Backplane Interface | Legacy Parallel Bus Extension |
Use Scenario: Interfacing a 16-bit microcontroller data bus to a modular backplane carrying sensor, actuator, and communication modules. IC Role / Device Role / Timing Role: Bidirectional-capable (via OE control) bus driver isolating MCU from backplane capacitance and EMI coupling. Use Value: Latch-up immunity >250 mA and 2000-V HBM ESD protect against field-induced transients in factory automation settings. |
Use Scenario: Extending a 16-bit ISA or PC/104 bus across a mezzanine connector with >30 pF interconnect capacitance. IC Role / Device Role / Timing Role: True-level-shifting buffer supporting 1.65–3.6 V operation to bridge legacy 5-V-tolerant peripherals with modern low-voltage controllers. Use Value: 1.65 V minimum VCC allows direct use with battery-backed 1.8 V SoCs; NC pins simplify escape routing on 4-layer boards. |
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 |
|---|---|---|---|
| SN74ALVCH16244ZRDR | Pb-free (SnAgCu) finish, same GRD package and pinout, identical electrical specs. | RoHS-compliant alternative with same thermal and mechanical behavior; suitable for new designs requiring lead-free assembly. | Select when RoHS compliance and long-term availability are prioritized over legacy SnPb process. |
| 74ALVCH16244ZQLR | 56-ball ZQL package (vs. 54-ball GRD), adds two NC balls; otherwise identical function, timing, and drive. | Slightly larger footprint (5.6 × 6.4 mm vs. 5.5 × 6.3 mm); requires minor PCB redesign but offers identical performance and enhanced manufacturability. | Choose for new layouts where additional routing clearance or future-proofing against GRD obsolescence is needed. |
Compared with 74ALVCH16244GRDR, the ZRDR variant provides identical functionality with Pb-free termination for regulatory compliance, while ZQLR offers a mechanically distinct but electrically equivalent 56-ball option - both retain bus-hold, 3 ns tpd, and ±24-mA drive, making them drop-in alternatives only if package change is acceptable.
Availability
74ALVCH16244GRDR is available at Aetrix Electronics and suitable for memory address buffering, clock distribution networks, and industrial backplane interfaces requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 74ALVCH16244GRDR 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 over 50 years of innovation in high-reliability interface and signal-path components.
The 74ALVCH16244GRDR belongs to TI's Widebus™ family - designed specifically to improve density and performance of 3-state memory address drivers, clock drivers, and bus-oriented receivers/transmitters in industrial and computing systems.
FAQ
What is the recommended power-up sequence for 74ALVCH16244GRDR to ensure 3-state integrity?
TI specifies that OE inputs must be held high (inactive) during power-up to prevent unintended output contention. Tie each OE (1OE–4OE) to VCC through a pullup resistor - minimum value determined by the driver's current-sinking capability (typically ≤10 kΩ). This ensures all outputs remain in high-impedance until firmware asserts OE low, avoiding bus conflicts in FPGA- or microcontroller-controlled systems using 74ALVCH16244GRDR.
Does 74ALVCH16244GRDR support hot insertion or live swapping in backplane applications?
No - 74ALVCH16244GRDR is not hot-swap rated. Its absolute maximum ratings do not include powered insertion stress, and the lack of Ioff (power-off protection) means VCC must be stable before applying input signals. For hot-plug systems, use TI's SN74CBT16244 or dedicated hot-swap buffers instead of 74ALVCH16244GRDR.
Can bus-hold circuitry in 74ALVCH16244GRDR be disabled or bypassed?
No - bus-hold is permanently enabled 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 floating - the 74ALVCH16244GRDR bus-hold will maintain valid logic levels automatically.
What is the maximum capacitive load 74ALVCH16244GRDR can drive while maintaining 3 ns propagation delay?
At VCC = 3.3 V and TA = 25°C, 74ALVCH16244GRDR maintains ≤3 ns tpd driving a 50-pF load (including trace and input capacitance). With higher loads (e.g., 100 pF), tpd increases to ~4.5 ns. For guaranteed 3 ns operation, keep total load ≤50 pF - verified in TI's SCES014K switching characteristics table for 74ALVCH16244GRDR.
Is 74ALVCH16244GRDR pin-compatible with older 74ALVC16244 variants?
No - 74ALVCH16244GRDR uses a 54-ball GRD BGA package, while legacy 74ALVC16244 parts use TSSOP (DGG), SSOP (DL), or TVSOP (DGV) packages with 48 pins and different pinouts. Electrical specs are similar, but mechanical incompatibility and differing ball/pin assignments mean 74ALVCH16244GRDR requires a dedicated PCB layout - it is not a drop-in replacement for through-hole or SOIC variants.
74ALVCH16244GRDR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ALVCH
- Package/Case:
- 54-TFBGA
- 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:
- 54-BGA Microstar Junior (8x5.5)
74ALVCH16244GRDR FAQ
1.How can I place an order for 74ALVCH16244GRDR through Aetrix?
Please submit a Request for Quotation (RFQ) for 74ALVCH16244GRDR 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 74ALVCH16244GRDR reliable?
The price and inventory of 74ALVCH16244GRDR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74ALVCH16244GRDR is usually 5 days.
3.What payment methods are accepted for 74ALVCH16244GRDR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74ALVCH16244GRDR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74ALVCH16244GRDR?
74ALVCH16244GRDR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74ALVCH16244GRDR 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 74ALVCH16244GRDR?
For technical support, including 74ALVCH16244GRDR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74ALVCH16244GRDR requirements.
6.How does Aetrix verify that 74ALVCH16244GRDR is sourced from the original manufacturer or authorized distributors?
All 74ALVCH16244GRDR 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 74ALVCH16244GRDR meets industry standards.
7.What is the process for return or replacement of 74ALVCH16244GRDR?
All 74ALVCH16244GRDR units undergo pre-shipment inspection (PSI). If there is an issue with 74ALVCH16244GRDR, 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 74ALVCH16244GRDR part is unused and in its original packaging.
Return procedure for 74ALVCH16244GRDR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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