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NXP Semiconductors 74ABT244PW,112
- Part No.:
- 74ABT244PW,112
- Manufacturer:
- NXP Semiconductors
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
74ABT244PW,112.pdf
- Description:
- IC BUFF NON-INVERT 5.5V 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,400
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Product details
Overview
74ABT244PW from Nexperia is an octal 3-state buffer/line driver in TSSOP20 package, designed for bidirectional bus interfacing with two independent 4-bit sections. It operates from 4.5 V to 5.5 V, delivers ±32 mA/±64 mA output drive, supports partial power-down via IOFF, and functions across –40 °C to +85 °C for industrial backplane and memory address buffering.
For engineers reviewing the 74ABT244PW datasheet, 74ABT244PW pinout, 74ABT244PW application, or 74ABT244PW equivalent, this device is selected for TTL-compatible level translation, high-drive bus isolation, and live-insertion-capable system expansion where controlled output enable timing and low OFF-state leakage are critical.
Technical Context
The 74ABT244PW implements dual independent 4-bit non-inverting buffers, each controlled by a dedicated active-low output enable (1OE, 2OE). Its BiCMOS architecture enables fast propagation delays (tPLH/tPHL ≤ 4.6 ns at 5 V) while sustaining robust drive strength (–32 mA HIGH, +64 mA LOW).
IOFF circuitry actively disables outputs during power-down, limiting backflow current to ±100 μA at VCC = 0 V and VO/VI ≤ 4.5 V. The device features latch-up immunity >500 mA and ESD protection exceeding 2000 V HBM and 1000 V CDM.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - ensures compatibility with standard 5 V TTL and CMOS systems without level-shifting. |
| Output Drive | +64 mA / –32 mA - drives heavy capacitive loads and multiple TTL inputs directly without external buffers. |
| Propagation Delay | tPLH/tPHL ≤ 4.6 ns @ 5 V - supports high-speed data transfer on 20+ MHz buses with tight timing margins. |
| IOFF Leakage | ±100 μA max @ VCC = 0 V - prevents damaging back-current during hot-swap or partial power-down sequences. |
| Operating Temperature | –40 °C to +85 °C - qualified for industrial control, telecom infrastructure, and embedded computing environments. |
| ESD Protection | HBM >2000 V, CDM >1000 V - withstands handling and board-level electrostatic events without functional degradation. |
| Input Thresholds | VIL ≤ 0.8 V, VIH ≥ 2.0 V - guarantees reliable logic recognition across voltage tolerances and noise margins. |
Pinout & Package
TSSOP20 package (SOT360-1), 4.4 mm body width, 0.65 mm lead pitch, surface-mount compatible with automated assembly and thermal performance suitable for dense PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 19 | 1OE, 2OE | Active-low output enables - independently disable Group 1 (pins 12–18) or Group 2 (pins 3–9) outputs to isolate bus segments. |
| 2, 4, 6, 8 | 1A0–1A3 | Group 1 input data lines - accept TTL/CMOS logic levels for first 4-bit buffer section. |
| 17, 15, 13, 11 | 2A0–2A3 | Group 2 input data lines - support second independent 4-bit channel with separate enable control. |
| 18, 16, 14, 12 | 1Y0–1Y3 | Group 1 buffered outputs - deliver inverted-logic-compatible drive strength with 3-state control. |
| 3, 5, 7, 9 | 2Y0–2Y3 | Group 2 buffered outputs - electrically isolated from Group 1; enable concurrent dual-bus operation. |
| 10 | GND | Ground reference - common return path for all I/O and supply currents; requires low-impedance PCB plane. |
| 20 | VCC | Power supply - decoupling capacitor (100 nF ceramic) required within 5 mm for stable high-speed switching. |
Key Features
| Feature | Design Value |
|---|---|
| BiCMOS process technology | Enables 2.6 ns typical propagation delay with 64 mA sink capability - balances speed and drive without external amplification. |
| IOFF partial power-down | Prevents destructive back-current flow when VCC = 0 V and I/O pins remain biased - essential for hot-plug modular systems. |
| Live insertion capability | Guaranteed functionality during board insertion under power - supported by controlled power-up 3-state behavior and latch-up immunity >500 mA. |
| Power-up 3-state | Outputs remain in high-impedance state until VCC stabilizes - eliminates bus contention during system boot or reset sequencing. |
| TTL-level interface compatibility | Accepts standard TTL input thresholds (VIH ≥ 2.0 V, VIL ≤ 0.8 V) and drives TTL loads directly - eliminates level translators in legacy designs. |
Applications
| Industrial Backplane Interface | Memory Address Buffering |
|---|---|
Use Scenario: Isolating CPU address/data buses from peripheral slots in programmable logic controllers (PLCs) with hot-swap capability. IC Role / Device Role / Timing Role: Dual 4-bit 3-state buffer providing direction-controlled signal routing and bus contention prevention during module insertion/removal. Use Value: IOFF and power-up 3-state eliminate bus glitches and back-current damage during live maintenance, extending system uptime. |
Use Scenario: Driving multiplexed address lines to SRAM or Flash memory arrays in embedded microcontroller systems. IC Role / Device Role / Timing Role: High-drive octal buffer ensuring clean, fast edge transitions across long PCB traces to meet memory access timing windows. Use Value: 64 mA sink current maintains VOL ≤ 0.55 V even under 50 pF load, guaranteeing valid logic levels at memory inputs. |
| Legacy System Bus Expansion | TTL-to-CMOS Level Translation |
Use Scenario: Adding parallel I/O ports to ISA or PCI-104 based industrial computers using discrete logic. IC Role / Device Role / Timing Role: Bidirectional bus driver enabling shared data paths between CPU and add-on cards with independent group enables. Use Value: Independent 1OE/2OE pins allow selective activation of I/O groups, reducing dynamic power and simplifying control firmware. |
Use Scenario: Interfacing 5 V TTL peripherals (e.g., UARTs, ADCs) with 5 V CMOS microcontrollers requiring clean logic thresholds. IC Role / Device Role / Timing Role: Non-inverting level translator with guaranteed VIH/VIL margins and sub-5 ns propagation for synchronous data capture. Use Value: Direct TTL compatibility eliminates external resistors or dedicated level shifters, reducing BOM count and layout area. |
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 |
|---|---|---|---|
| SN74ABT244N | SOIC-20 package (SOT163-1), wider 7.5 mm body, higher thermal resistance (θJA ≈ 70 °C/W vs. 110 °C/W for TSSOP) | Better suited for through-hole prototyping or legacy SOIC footprints; less space-efficient than TSSOP | Select when board real estate allows larger footprint and manual soldering is preferred. |
| 74LVT244PW | Lower 3.3 V supply range (2.7–3.6 V), reduced drive (±24 mA), faster tPLH/tPHL (≤ 3.2 ns), no IOFF circuitry | Designed for 3.3 V systems only; lacks partial power-down protection for mixed-voltage hot-swap | Choose only for pure 3.3 V domains where IOFF is unnecessary and speed is prioritized over drive strength. |
Compared with SN74ABT244N and 74LVT244PW, the 74ABT244PW uniquely combines 5 V operation, industrial temperature range, IOFF-enabled hot-swap safety, and compact TSSOP20 packaging-making it optimal for space-constrained, mixed-power industrial modules requiring robust bus isolation.
Availability
74ABT244PW is available at Aetrix Electronics and suitable for industrial backplane interfaces, memory address buffering, legacy bus expansion, and TTL-to-CMOS level translation requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 74ABT244PW 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 high-volume, high-reliability logic, analog, and MOSFET solutions for automotive, industrial, and consumer markets.
The 74ABT series targets high-speed, high-drive 5 V logic applications demanding robustness, live-insertion capability, and partial power-down compliance-specifically engineered for industrial control, communications infrastructure, and legacy system upgrades.
FAQ
What is the maximum allowable output current per pin for 74ABT244PW?
The 74ABT244PW supports up to +64 mA sink current (IOL) and –32 mA source current (IOH) per output pin under recommended operating conditions (VCC = 4.5–5.5 V, Tamb = –40 °C to +85 °C). These values are specified at VOH = 2.0 V and VOL = 0.55 V, ensuring reliable drive into standard TTL loads without derating.
Does 74ABT244PW support hot-swap or live-insertion applications?
Yes. The 74ABT244PW incorporates IOFF circuitry that disables outputs and limits backflow current to ±100 μA when VCC = 0 V, along with power-up 3-state behavior and latch-up immunity exceeding 500 mA. These features collectively enable safe insertion and removal in powered-backplane systems per JESD78 Class II requirements.
Can 74ABT244PW be used in 3.3 V systems?
No. The 74ABT244PW is specified only for 4.5 V to 5.5 V operation. Its input thresholds (VIH ≥ 2.0 V, VIL ≤ 0.8 V) and output drive characteristics are optimized for 5 V TTL compatibility. For 3.3 V systems, consider the pin-compatible 74LVT244PW, which operates from 2.7 V to 3.6 V but lacks IOFF protection.
How does the dual output-enable architecture improve system design?
The independent 1OE and 2OE inputs allow selective activation of two 4-bit output groups (1Y0–1Y3 and 2Y0–2Y3), enabling time-multiplexed bus sharing, segmented memory addressing, or fault-isolated peripheral control. This reduces external logic, simplifies firmware enable sequencing, and minimizes simultaneous switching noise compared to single-enable octal buffers.
74ABT244PW,112 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- 74ABT
- Package/Case:
- 20-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Bulk
- 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:
- 32mA, 64mA
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TSSOP
74ABT244PW,112 FAQ
1.How can I place an order for 74ABT244PW,112 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74ABT244PW,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 74ABT244PW,112 reliable?
The price and inventory of 74ABT244PW,112 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74ABT244PW,112 is usually 5 days.
3.What payment methods are accepted for 74ABT244PW,112?
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4.How is shipping managed for 74ABT244PW,112?
74ABT244PW,112 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74ABT244PW,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 74ABT244PW,112?
For technical support, including 74ABT244PW,112 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74ABT244PW,112 requirements.
6.How does Aetrix verify that 74ABT244PW,112 is sourced from the original manufacturer or authorized distributors?
All 74ABT244PW,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 74ABT244PW,112 meets industry standards.
7.What is the process for return or replacement of 74ABT244PW,112?
All 74ABT244PW,112 units undergo pre-shipment inspection (PSI). If there is an issue with 74ABT244PW,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 74ABT244PW,112 part is unused and in its original packaging.
Return procedure for 74ABT244PW,112:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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