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Nexperia USA Inc. 74LVTH244APW,112
- Part No.:
- 74LVTH244APW,112
- Manufacturer:
- Nexperia USA Inc.
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
74LVTH244APW,112.pdf
- Description:
- IC BUF NON-INVERT 3.6V 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,645
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Product details
Overview
74LVTH244APW,112 from Nexperia is a 3.3 V octal 3-state buffer/line driver in TSSOP20 package, configured as two independent 4-bit buffers with separate active-low output enables (1OE, 2OE). It delivers ±32 mA HIGH-level and +64 mA LOW-level output drive, supports 5.5 V-tolerant inputs, and operates from −40 °C to +85 °C. Used in backplane bus interfacing and level translation between 3.3 V logic and 5 V legacy systems.
For engineers reviewing the 74LVTH244APW,112 datasheet, 74LVTH244APW,112 pinout, 74LVTH244APW,112 application, or 74LVTH244APW,112 equivalent, key selection criteria include bus-hold input retention, IOFF partial power-down behavior, propagation delays under 4.1 ns at 3.3 V, and compatibility with TTL-level signaling without external pull-ups.
Technical Context
This BiCMOS device implements dual 4-bit non-inverting buffers with independent 3-state control per group. Each output enable (1OE, 2OE) gates four outputs into high-impedance state when asserted low, enabling time-multiplexed bus sharing.
Bus-hold circuitry actively maintains last-valid logic state on unused inputs without external resistors, while IOFF protection disables output leakage when VCC = 0 V-critical for live insertion and hot-swap applications. Input overvoltage tolerance up to 5.5 V allows direct connection to 5 V buses without level shifters.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply voltage | 2.7 V to 3.6 V - ensures stable operation across industrial-grade 3.3 V rails with ±0.3 V margin |
| Output drive (LOW) | +64 mA - drives heavy capacitive loads (e.g., 10+ cm PCB traces or multiple CMOS inputs) without signal degradation |
| Output drive (HIGH) | −32 mA - sustains clean HIGH-level signaling into TTL-compatible loads or terminated lines |
| Propagation delay | 1–4.1 ns at VCC = 3.3 V - supports >200 MHz bus toggle rates in point-to-point configurations |
| Input voltage range | 0 V to 5.5 V - enables direct interface with 5 V peripherals without external level-shifting components |
| Operating temperature | −40 °C to +85 °C - qualified for industrial ambient environments including factory automation and telecom infrastructure |
| Bus hold current | ±75 μA to ±150 μA - actively retains logic state on floating inputs, eliminating need for 10 kΩ pull-up/down resistors |
Pinout & Package
TSSOP20 plastic thin shrink small outline package (SOT360-1), 20-lead, body width 4.4 mm, 0.65 mm pitch, exposed pad not electrically connected.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 19 | 1OE, 2OE | Active-low output enable controls Y0–Y3 (Pin 1) and Y0–Y3 of second group (Pin 19); both must be HIGH for output drivers to be active |
| 2, 4, 6, 8 | 1A0–1A3 | Data inputs for first 4-bit buffer group; routed directly to outputs 1Y0–1Y3 when 1OE = HIGH |
| 11, 13, 15, 17 | 2A0–2A3 | Data inputs for second 4-bit buffer group; routed to outputs 2Y0–2Y3 when 2OE = HIGH |
| 12, 14, 16, 18 | 1Y0–1Y3 | 3-state outputs for first group; high-impedance when 1OE = LOW; driven by 1A0–1A3 otherwise |
| 3, 5, 7, 9 | 2Y0–2Y3 | 3-state outputs for second group; high-impedance when 2OE = LOW; driven by 2A0–2A3 otherwise |
| 10 | GND | Ground reference for all internal circuitry and I/O; requires low-inductance connection to system ground plane |
| 20 | VCC | Primary supply rail; decoupling capacitor (100 nF ceramic) required within 5 mm of this pin |
Key Features
| Feature | Design Value |
|---|---|
| Bus-hold inputs | Eliminates external pull-up/pull-down resistors on unused data lines-reduces BOM count and board area in sparse-bus designs |
| IOFF partial power-down | Blocks output leakage current when VCC = 0 V, enabling safe hot-plug insertion into powered backplanes |
| 5.5 V tolerant inputs | Accepts 5 V logic signals while powered from 3.3 V, removing need for discrete level translators in mixed-voltage systems |
| Live insertion support | Guaranteed functionality during mechanical insertion into live backplanes due to controlled power sequencing and latch-up immunity >500 mA |
| BiCMOS process | Combines bipolar speed and MOS input impedance-delivers sub-5 ns propagation with <0.2 mA quiescent ICC at 3.3 V |
Applications
| Backplane Bus Interface | Legacy System Level Translation |
|---|---|
Use Scenario: Driving shared address/data bus across multiple slots in a modular industrial controller chassis. IC Role / Device Role / Timing Role: Bidirectional buffer isolating slot-specific logic from main backplane; enables time-multiplexed access via OE-controlled gating. Use Value: 64 mA sink capability drives 15 cm FR4 traces loaded with 10 pF/slot; bus-hold prevents floating states during slot removal. | Use Scenario: Interfacing a 3.3 V FPGA I/O bank to legacy 5 V peripheral ASICs on the same PCB. IC Role / Device Role / Timing Role: Unidirectional level translator and current booster; accepts 5 V inputs, outputs 3.3 V-compatible signals with TTL drive strength. Use Value: 5.5 V input tolerance eliminates external clamping diodes; ±32 mA drive matches TTL fan-out requirements without added transistors. |
| Hot-Swappable Module Control | Memory Expansion Subsystem |
Use Scenario: Enabling/disabling communication lines to a field-replaceable compute module inserted into an active server motherboard. IC Role / Device Role / Timing Role: 3-state isolation gate controlled by hot-swap controller; asserts OE during insertion sequence to prevent bus contention. Use Value: IOFF circuitry blocks leakage when VCC is unpowered during insertion; latch-up immunity (>500 mA) prevents failure during transient faults. | Use Scenario: Buffering control/address lines between a microcontroller and parallel NOR flash memory array with 20+ load capacitance. IC Role / Device Role / Timing Role: Low-skew octal driver ensuring simultaneous edge alignment across all address bits to meet flash setup/hold timing. Use Value: 1–4.1 ns propagation delay variation (<0.3 ns skew) guarantees <1 ns address valid window at 100 MHz operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal 3-state buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC244APWR | Lower drive (+24 mA/−24 mA), 1.65–3.6 V supply, no bus-hold or IOFF | Suitable only for light-load, single-supply 3.3 V systems without hot-swap or floating-input concerns | Select when cost sensitivity outweighs robustness needs and bus loading is ≤ 15 pF |
| 74ALVCH244PW,118 | Same pinout/package, higher speed (tPD = 2.3 ns typ), but no 5.5 V input tolerance | Requires external clamping for 5 V inputs; unsuitable for direct 5 V bus interfacing | Choose for maximum speed in pure 3.3 V domains where input voltage never exceeds VCC + 0.3 V |
Compared with SN74LVC244APWR and 74ALVCH244PW,118, the 74LVTH244APW,112 uniquely combines 5.5 V input tolerance, bus-hold, and IOFF in a single TSSOP20 package-making it the only option for robust 3.3 V/5 V mixed-signal backplane interfaces requiring live insertion.
Availability
74LVTH244APW,112 is available at Aetrix Electronics and suitable for industrial backplane interfaces, legacy system level translation, hot-swappable module control, and memory expansion subsystems requiring stable component supply across extended temperature ranges.
Supply support for 74LVTH244APW,112 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
Nexperia is a global semiconductor expert focused on essential efficiency technologies, delivering high-performance logic, analog, and MOSFET solutions for industrial, automotive, and computing markets.
The 74LVTH series targets high-speed, robust bus interface applications in industrial and telecom equipment, emphasizing mixed-voltage interoperability, live-insertion safety, and minimal external component count.
FAQ
Can 74LVTH244APW,112 safely drive a 5 V bus while powered from 3.3 V?
Yes. Its inputs tolerate up to 5.5 V regardless of VCC level, allowing direct connection to 5 V buses. Outputs swing rail-to-rail between GND and VCC (3.3 V), so external pull-ups are required if 5 V HIGH-level signaling is needed on the driven bus.
What is the purpose of the exposed thermal pad on the TSSOP20 package?
The exposed pad (Pin 1 index area) on SOT360-1 has no electrical function. Nexperia specifies it may remain floating or be connected to GND-but if soldered, the land must not create a thermal short or violate isolation requirements. It provides minor thermal relief but is not rated for heatsinking.
How does bus-hold functionality affect unused input pins?
Bus-hold circuitry sources or sinks ±75 μA to ±150 μA to retain the last-driven logic state on floating inputs. This eliminates need for external 10 kΩ pull-up/down resistors, reducing component count and PCB space-especially valuable in sparsely populated bus architectures.
Is 74LVTH244APW,112 qualified for automotive applications?
No. The device is specified for −40 °C to +85 °C industrial operation and carries no AEC-Q100 qualification. Nexperia explicitly states non-automotive qualified products are unsuitable for safety-critical or life-support systems, and automotive use voids standard warranty coverage.
74LVTH244APW,112 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- 74LVTH
- Package/Case:
- 20-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Logic Type:
- Buffer, Non-Inverting
- Number of Elements:
- 2
- Number of Bits per Element:
- 4
- Input Type:
- -
- Output Type:
- 3-State
- Current - Output High, Low:
- 32mA, 64mA
- Voltage - Supply:
- 2.7V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TSSOP
74LVTH244APW,112 FAQ
1.How can I place an order for 74LVTH244APW,112 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74LVTH244APW,112 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 74LVTH244APW,112 reliable?
The price and inventory of 74LVTH244APW,112 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74LVTH244APW,112 is usually 5 days.
3.What payment methods are accepted for 74LVTH244APW,112?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74LVTH244APW,112 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74LVTH244APW,112?
74LVTH244APW,112 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74LVTH244APW,112 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 74LVTH244APW,112?
For technical support, including 74LVTH244APW,112 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74LVTH244APW,112 requirements.
6.How does Aetrix verify that 74LVTH244APW,112 is sourced from the original manufacturer or authorized distributors?
All 74LVTH244APW,112 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 74LVTH244APW,112 meets industry standards.
7.What is the process for return or replacement of 74LVTH244APW,112?
All 74LVTH244APW,112 units undergo pre-shipment inspection (PSI). If there is an issue with 74LVTH244APW,112, 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 74LVTH244APW,112 part is unused and in its original packaging.
Return procedure for 74LVTH244APW,112:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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