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STMicroelectronics 74ALVCH16244TTR
- Part No.:
- 74ALVCH16244TTR
- Manufacturer:
- STMicroelectronics
- Package:
- 48-TFSOP (0.240", 6.10mm Width)
- Datasheet:
-
74ALVCH16244TTR.pdf
- Description:
- IC BUF NON-INVERT 3.6V 48TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,816
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Product details
Overview
74ALVCH16244TTR from STMicroelectronics is a 16-bit non-inverting 3-state bus buffer with 3.6V-tolerant I/O, operating from 1.65V to 3.6V supply. It features four independent output-enable groups (1G–4G), symmetrical ±24mA drive at 3.0V, 3.0ns max propagation delay, and integrated bus-hold on all data inputs - used in voltage-translating memory address/data buses and low-voltage system interconnects.
For engineers reviewing the 74ALVCH16244TTR datasheet, 74ALVCH16244TTR pinout, 74ALVCH16244TTR application, or 74ALVCH16244TTR equivalent, key selection criteria include 3.6V I/O tolerance across VCC = 1.65–3.6V, group-level 3-state control, bus-hold functionality for floating inputs, and TSSOP-48 thermal/power behavior under industrial temperature range (–55°C to +125°C).
Technical Context
This device implements four independent 4-bit non-inverting buffers, each controlled by a dedicated active-low output-enable input (1G–4G). All inputs and outputs are 3.6V tolerant regardless of VCC, enabling safe interfacing between 1.8V/2.5V logic domains and 3.3V/3.6V signal environments.
Bus-hold circuitry actively maintains valid logic levels on unused data inputs without external pull-ups; output impedance is symmetrical (|IOH| = IOL) with guaranteed drive strength scaling per VCC (±4mA @ 1.65V, ±12mA @ 2.3V, ±24mA @ 3.0V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 1.65V to 3.6V - supports mixed-voltage system interfacing and battery-powered low-power operation |
| tPD (Max) | 3.0 ns @ VCC = 3.0–3.6V - enables high-speed address/data buffering in DDR2/DDR3 memory subsystems |
| IOL / IOH | ±24 mA @ VCC = 3.0V - drives standard 50Ω transmission lines or multiple CMOS loads without external buffers |
| Input Tolerance | 3.6V tolerant inputs/outputs - allows direct connection to 3.3V buses while powered from 1.8V supply |
| Bus-Hold | Integrated on all data inputs - eliminates need for external pull-up/down resistors on unterminated traces |
| ESD Rating | HBM > 2000V - meets industrial-grade robustness requirements for board-level handling and field operation |
| Operating Temp | –55°C to +125°C - qualified for automotive under-hood and industrial control applications |
Pinout & Package
TSSOP-48 package (4.4mm × 12.5mm body, 0.5mm pitch), lead-free and RoHS-compliant, optimized for high-density PCB layouts with thermal performance suitable for continuous 24mA per output operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 24, 25, 48 | Output Enable (1G–4G) | Active-low group controls: each enables/disables four corresponding Y outputs simultaneously |
| 2–3, 5–6, 8–9, 11–12, 13–14, 16–17, 19–20, 22–23, 26–27, 29–30, 32–33, 35–36, 37–38, 40–41, 43–44, 46–47 | Data Outputs (Y1–Y4 per group) | Non-inverting buffered outputs with 3-state capability and 3.6V tolerance |
| 4, 10, 15, 21, 28, 34, 39, 45 | Data Inputs (A1–A4 per group) | Bus-hold enabled inputs accepting 0–3.6V signals independent of VCC level |
| 4, 10, 15, 21, 28, 34, 39, 45 | GND | Eight ground pins distributed for low-inductance return paths and noise reduction |
| 7, 18, 31, 42 | VCC | Four power pins placed for balanced supply distribution and reduced IR drop |
Key Features
| Feature | Design Value |
|---|---|
| 3.6V I/O Tolerance | Enables interoperability between 1.65V–3.6V logic domains without level shifters |
| Grouped 3-State Control | Four independent OE inputs allow selective activation of 4-bit segments for partial bus isolation |
| Integrated Bus-Hold | Maintains stable logic states on floating inputs - reduces BOM count and layout complexity |
| Symmetrical Output Drive | Matched |IOH| and IOL ensures consistent rise/fall times and signal integrity across voltage ranges |
| Industrial Temperature Range | –55°C to +125°C operation supports deployment in harsh environments without derating |
Applications
| Memory Address Buffering | Low-Voltage FPGA I/O Expansion |
|---|---|
Use Scenario: Driving address lines from a 1.8V microcontroller to a 3.3V SRAM or Flash memory device. IC Role / Device Role / Timing Role: Non-inverting 3-state bus buffer providing voltage translation and drive strength boost. Use Value: Eliminates discrete level shifters; 3.6V-tolerant outputs interface directly with 3.3V memory VDDIO while powered from 1.8V. | Use Scenario: Extending I/O count of a low-power FPGA in portable instrumentation with mixed-voltage peripherals. IC Role / Device Role / Timing Role: Group-controllable buffer isolating FPGA GPIO banks from external sensors and DACs. Use Value: Four independent OE pins enable dynamic partitioning of 16-bit I/O expansion without software overhead. |
| Industrial PLC Backplane Interface | Automotive Body Control Module |
Use Scenario: Interfacing 2.5V programmable logic to legacy 3.3V backplane transceivers in modular I/O racks. IC Role / Device Role / Timing Role: Voltage-agnostic bus repeater with latch-up immunity (>300mA) and ESD hardening. Use Value: JESD17-compliant latch-up performance and HBM >2kV withstand ensure reliability in electrically noisy factory floors. | Use Scenario: Buffering LIN or CAN controller GPIOs to external LED drivers and relay drivers in cabin modules. IC Role / Device Role / Timing Role: Robust signal conditioner for low-speed control signals requiring bus-hold and wide VCC range. Use Value: Operates down to 1.65V during cold-crank conditions while maintaining 3.6V-tolerant diagnostics signaling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-bit non-inverting bus buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74ALVCH16244DGGR | Same logic function, identical AC/DC specs, but TI's version uses different internal bus-hold threshold calibration | Valid for TI-based reference designs; pinout and footprint match exactly | Select when sourcing from TI-authorized channels or aligning with TI ecosystem toolchains |
| 74LVC16244APAG | Lower drive (±24mA only at 3.3V), no bus-hold, 3.6V I/O tolerance retained | Requires external pull resistors; suited for cost-sensitive consumer applications where bus-hold is not critical | Choose when BOM cost reduction outweighs need for floating-input immunity |
Compared with SN74ALVCH16244DGGR and 74LVC16244APAG, the 74ALVCH16244TTR uniquely combines guaranteed bus-hold functionality, symmetrical drive across full VCC range, and STMicroelectronics' industrial-grade latch-up and ESD specifications - making it optimal for mission-critical embedded systems.
Availability
74ALVCH16244TTR is available at Aetrix Electronics and suitable for memory subsystems, FPGA I/O expansion, industrial PLC backplanes, and automotive body control modules requiring stable component supply across extended temperature and voltage ranges.
Supply support for 74ALVCH16244TTR 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
STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, specializing in automotive, industrial, and power management ICs with vertical manufacturing capabilities.
The ALVCH logic family targets high-speed, low-voltage, mixed-signal system interfacing - designed specifically for voltage-translating data/address buses in memory controllers, FPGAs, and programmable logic systems.
FAQ
What is the maximum clock frequency supported by the 74ALVCH16244TTR?
The device does not operate on a clock; it is an asynchronous buffer. Its usable data rate depends on propagation delay and system timing margins. With tPD = 3.0 ns (max) and clean edges, it reliably supports data rates up to ~150 MHz in point-to-point configurations with proper termination and layout.
Can the 74ALVCH16244TTR be operated at 1.65V while driving 3.3V-tolerant loads?
Yes. The 74ALVCH16244TTR maintains full 3.6V I/O tolerance regardless of VCC. At 1.65V supply, outputs swing rail-to-rail (0V to 1.65V) but remain compatible with 3.3V CMOS inputs due to its overvoltage-tolerant structure and input clamp diodes rated to 4.6V absolute max.
How does the bus-hold feature behave when VCC = 1.65V?
Bus-hold remains fully functional at minimum VCC. Input hold current is specified as ±25 µA at VI = 0.58V and ±45 µA at VI = 0.7V (VCC = 1.65V), ensuring stable logic retention even under worst-case low-voltage conditions without external biasing.
Is the 74ALVCH16244TTR pin-compatible with older 74AC/74HC16244 variants?
No. While functionally similar, the 74ALVCH16244TTR uses a TSSOP-48 package with different pin mapping than the SOIC-48 or SSOP-48 versions of legacy 74AC/HC16244. Pin compatibility is confirmed only with other ALVCH-series 16244 devices in TSSOP-48, such as ST's own 74ALVCH16244TR.
74ALVCH16244TTR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- 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:
- 1.65V ~ 3.6V
- Operating Temperature:
- -55°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-TSSOP
74ALVCH16244TTR FAQ
1.How can I place an order for 74ALVCH16244TTR through Aetrix?
Please submit a Request for Quotation (RFQ) for 74ALVCH16244TTR 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 74ALVCH16244TTR reliable?
The price and inventory of 74ALVCH16244TTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74ALVCH16244TTR is usually 5 days.
3.What payment methods are accepted for 74ALVCH16244TTR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74ALVCH16244TTR transactions.
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4.How is shipping managed for 74ALVCH16244TTR?
74ALVCH16244TTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74ALVCH16244TTR 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 74ALVCH16244TTR?
For technical support, including 74ALVCH16244TTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74ALVCH16244TTR requirements.
6.How does Aetrix verify that 74ALVCH16244TTR is sourced from the original manufacturer or authorized distributors?
All 74ALVCH16244TTR 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 74ALVCH16244TTR meets industry standards.
7.What is the process for return or replacement of 74ALVCH16244TTR?
All 74ALVCH16244TTR units undergo pre-shipment inspection (PSI). If there is an issue with 74ALVCH16244TTR, 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 74ALVCH16244TTR part is unused and in its original packaging.
Return procedure for 74ALVCH16244TTR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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