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Texas Instruments SN74LVCZ244APWR
- Part No.:
- SN74LVCZ244APWR
- Manufacturer:
- Texas Instruments
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74LVCZ244APWR.pdf
- Description:
- IC BUF NON-INVERT 3.6V 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,112
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Product details
Overview
SN74LVCZ244APWR from Texas Instruments is an octal 3-state buffer/driver IC configured as two independent 4-bit banks, each controlled by a dedicated active-low output enable pin. It operates from 2.7V to 3.6V, supports 5.5V-tolerant inputs, achieves 5.9ns max propagation delay at 3.3V, and delivers balanced CMOS drive for high-speed bus interfacing in memory subsystems.
For engineers reviewing the SN74LVCZ244APWR datasheet, SN74LVCZ244APWR pinout, SN74LVCZ244APWR application, or SN74LVCZ244APWR equivalent, key selection criteria include VCC range (2.7–3.6V), 5.5V input tolerance, Ioff support for live insertion, mixed-mode signal operation, and thermal performance in TSSOP-20 packaging.
Technical Context
The SN74LVCZ244APWR implements dual 4-bit non-inverting buffers with independent active-low OE control per bank, enabling selective bus isolation. Its balanced CMOS 3-state outputs provide symmetrical sourcing/sinking capability up to ±24mA at 3V, while Ioff circuitry ensures zero current flow during partial power-down.
It features overvoltage-tolerant inputs (up to 5.5V) compatible with 5V logic driving a 3.3V VCC rail, latch-up immunity exceeding 100mA per JESD78 Class II, and ground bounce (VOLP) < 0.8V and undershoot (VOHV) > 2V at 3.3V/25°C - critical for signal integrity in dense PCB layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2.7V to 3.6V - defines valid supply window for guaranteed logic operation and timing compliance |
| Input Voltage Max | 5.5V - enables direct interface with 5V systems without level shifters |
| Max tpd | 5.9ns at 3.3V - ensures sub-6ns signal propagation for high-speed data buses |
| Ioff Support | Enables live insertion and back-drive protection during partial power-down |
| Output Drive | ±24mA at 3V - provides robust drive strength for capacitive loads and long traces |
| Latch-up Immunity | >100mA per JESD78 Class II - meets industrial reliability requirements |
| ESD Rating | 2500V HBM, 4000V CDM - exceeds standard handling requirements for automated assembly |
Pinout & Package
Packaged in 20-pin TSSOP (PW), the SN74LVCZ244APWR measures 6.5mm × 6.4mm (package) with a 6.5mm × 4.4mm body size and 0.65mm lead pitch. Thermal pad is not present in this variant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OE, 19OE | Bank 1 & 2 Output Enable (active low) | Independent control of 4-bit output banks; high = high-Z, low = enabled |
| 1A1–1A4, 2A1–2A4 | Input channels (8 total) | Non-inverting inputs mapped to corresponding Y outputs |
| 1Y1–1Y4, 2Y1–2Y4 | 3-State output channels (8 total) | Driven outputs; high-Z when respective OE is high |
| 10 GND, 20 VCC | Power terminals | Single-supply operation; requires local 0.1µF bypass capacitor |
Key Features
| Feature | Design Value |
|---|---|
| Mixed-mode signal operation | 5V-tolerant inputs on 3.3V VCC enable seamless interoperation between legacy and modern logic families |
| Low ground bounce (VOLP) | <0.8V at 3.3V/25°C reduces noise coupling into shared ground planes |
| Controlled undershoot (VOHV) | >2V at 3.3V/25°C prevents false triggering of downstream receivers |
| Live insertion support | Ioff limits leakage to ±5µA when VCC = 0V, allowing hot-swap capability in modular systems |
| High-speed switching | 5.9ns max tpd at 3.3V supports >100MHz bus clocking with margin |
Applications
| Memory Systems | Network Switches |
|---|---|
Use Scenario: Driving address/data lines between CPU and DDR SDRAM modules with trace lengths up to 12 cm. IC Role / Device Role / Timing Role: Octal buffer isolating and strengthening bidirectional memory bus signals with precise 3-state control per bank. Use Value: Enables reliable signal integrity at 3.3V logic levels while tolerating 5V test/debug signals on same bus. | Use Scenario: Level-shifting and buffering control signals between 5V management MCU and 3.3V packet-processing ASIC. IC Role / Device Role / Timing Role: Dual-bank 3-state driver providing isolated, glitch-free signal routing across voltage domains. Use Value: Eliminates need for discrete level translators; Ioff prevents back-driving during power sequencing. |
| Servers | PCs and Notebooks |
Use Scenario: Buffering SMBus, I²C, or GPIO expansion signals in multi-slot server backplanes. IC Role / Device Role / Timing Role: Low-latency bus repeater with independent bank enables/disables for dynamic resource allocation. Use Value: 5.9ns propagation delay ensures timing closure in high-density server firmware interfaces. | Use Scenario: Isolating BIOS configuration lines and platform controller hub (PCH) sideband signals. IC Role / Device Role / Timing Role: 3-state octal driver supporting hot-plug detection and partial power-down modes. Use Value: Ioff and live-insertion capability meet ACPI-compliant power management requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buffer/driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC244APWR | Lacks Z-series features: no 5.5V input tolerance, higher VOLP (~1.2V), no VOHV spec | Not suitable for mixed-voltage bus interfacing; limited to pure 3.3V systems | Select only if cost sensitivity outweighs mixed-mode requirement and layout allows tighter noise margins |
| 74LVC244ADTR2G | Same electrical specs but in SOIC-20 package (12.8mm × 10.3mm); higher RθJA (78.7°C/W) | Better thermal dissipation in low-airflow environments; incompatible pinout vs. TSSOP | Choose for legacy SOIC footprint compatibility or where board space permits larger package |
Compared with SN74LVC244APWR and 74LVC244ADTR2G, the SN74LVCZ244APWR uniquely combines 5.5V input tolerance, sub-0.8V ground bounce, and compact TSSOP-20 packaging - making it optimal for space-constrained, mixed-voltage embedded bus designs requiring signal integrity and hot-swap readiness.
Availability
SN74LVCZ244APWR is available at Aetrix Electronics and suitable for memory systems, network switches, servers, and PCs requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.
Supply support for SN74LVCZ244APWR 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 expertise in high-reliability interface ICs.
The SN74LVCZ244APWR belongs to TI's LVCZ logic family, engineered specifically for high-speed, low-noise bus buffering in mixed-voltage computing and communications infrastructure.
FAQ
What is the maximum operating temperature for SN74LVCZ244APWR?
The SN74LVCZ244APWR is rated for operation from –40°C to +125°C ambient temperature, validated across both recommended voltage ranges (2.7V–3.6V) and switching characteristics tables. This extended range supports deployment in industrial servers, telecom equipment, and automotive infotainment head units where thermal margins are critical. The device maintains full timing compliance and electrical specifications across this full range.
Does SN74LVCZ244APWR support live insertion in backplane applications?
Yes, SN74LVCZ244APWR supports live insertion via its Ioff feature: when VCC = 0V, input/output leakage is limited to ±5µA regardless of pin voltage, preventing back-drive damage during hot-swap events. This behavior is explicitly characterized in the Electrical Characteristics table and enables safe use in modular server blades and field-replaceable line cards without auxiliary power sequencing.
Can SN74LVCZ244APWR interface directly between 5V and 3.3V logic domains?
Yes, SN74LVCZ244APWR accepts input voltages up to 5.5V while operating from a 3.3V VCC, enabling direct connection to 5V microcontrollers, FPGAs, or test equipment without external level shifters. Its mixed-mode operation is confirmed in the Features section and supported by VI absolute maximum rating (–0.5V to 6.5V) and Recommended Operating Conditions (0V to 5.5V input range).
What is the recommended bypass capacitor for SN74LVCZ244APWR?
A 0.1µF ceramic capacitor is recommended for SN74LVCZ244APWR, placed as close as possible to the VCC (pin 20) and GND (pin 10) terminals. TI's Layout Guidelines specify short ground return paths and wide traces; paralleling with a 1µF capacitor is acceptable for broadband noise suppression. This configuration is validated in Figure 8-4 for TSSOP packages and ensures stable supply during fast 5.9ns edge transitions.
How does SN74LVCZ244APWR differ from standard SN74LVC244A in terms of signal integrity?
SN74LVCZ244APWR improves signal integrity over SN74LVC244APWR via lower ground bounce (VOLP < 0.8V vs. ~1.2V typical) and specified output undershoot (VOHV > 2V), both measured at 3.3V/25°C. These enhancements reduce noise coupling and prevent false logic transitions in high-density layouts - a distinction confirmed in the Features table and Typical Characteristics section of the datasheet.
SN74LVCZ244APWR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LVCZ
- Package/Case:
- 20-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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:
- 24mA, 24mA
- Voltage - Supply:
- 2.7V ~ 3.6V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TSSOP
SN74LVCZ244APWR FAQ
1.How can I place an order for SN74LVCZ244APWR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LVCZ244APWR 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 SN74LVCZ244APWR reliable?
The price and inventory of SN74LVCZ244APWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVCZ244APWR is usually 5 days.
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SN74LVCZ244APWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LVCZ244APWR 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 SN74LVCZ244APWR?
For technical support, including SN74LVCZ244APWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVCZ244APWR requirements.
6.How does Aetrix verify that SN74LVCZ244APWR is sourced from the original manufacturer or authorized distributors?
All SN74LVCZ244APWR 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 SN74LVCZ244APWR meets industry standards.
7.What is the process for return or replacement of SN74LVCZ244APWR?
All SN74LVCZ244APWR units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVCZ244APWR, 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 SN74LVCZ244APWR part is unused and in its original packaging.
Return procedure for SN74LVCZ244APWR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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