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NXP Semiconductors 74ABT244DB,112
- Part No.:
- 74ABT244DB,112
- Manufacturer:
- NXP Semiconductors
- Package:
- 20-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
74ABT244DB,112.pdf
- Description:
- IC BUFFER NON-INVERT 5.5V 20SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:6,968
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Product details
Overview
74ABT244DB,112 from Nexperia is an octal 3-state buffer/line driver in SO20 (SOT163-1) 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 74ABT244DB,112 datasheet, 74ABT244DB,112 pinout, 74ABT244DB,112 application, or 74ABT244DB,112 equivalent, key selection criteria include dual 3-state enable control (1OE/2OE), BiCMOS speed (tPLH/tPHL ≤ 4.6 ns), IOFF leakage < ±100 μA at VCC = 0 V, and compatibility with TTL input levels.
Technical Context
The 74ABT244DB,112 implements two independent 4-bit non-inverting buffers, each controlled by a dedicated active-low output enable (1OE for Y0–Y3, 2OE for Y0–Y3 of second section). Its BiCMOS architecture enables high-speed propagation (typ. 2.6–2.9 ns) while sustaining robust output drive (+64 mA sink / –32 mA source).
IOFF circuitry actively disables outputs during power-down, limiting backflow current to ±100 μA when VCC = 0 V and inputs/outputs ≤ 4.5 V. The device meets JESD78 Class II latch-up immunity (>500 mA) and ESD ratings per JS-001 (HBM >2000 V) and JS-002 (CDM >1000 V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - Ensures stable operation with standard 5 V TTL/CMOS rails and tolerates ±10 % supply variation. |
| Output Drive | +64 mA sink / –32 mA source - Drives heavy capacitive loads (e.g., 50 pF buses) without signal degradation or timing skew. |
| Propagation Delay | tPLH/tPHL ≤ 4.6 ns @ VCC = 5.0 V - Enables reliable 200+ MHz bus operation in high-speed digital systems. |
| IOFF Leakage | ±100 μA max @ VCC = 0 V - Prevents damaging backfeed current during hot-swap or partial system power-down. |
| Operating Temperature | –40 °C to +85 °C - Qualified for industrial environments including motor control enclosures and telecom line cards. |
| Input Compatibility | TTL-level compatible (VIH ≥ 2.0 V, VIL ≤ 0.8 V) - Interfaces directly with legacy 74LS/74F logic without level-shifting. |
| ESD Protection | HBM >2000 V, CDM >1000 V - Survives handling and board assembly without external protection components. |
Pinout & Package
74ABT244DB,112 uses the SO20 plastic small outline package (SOT163-1), 7.5 mm body width, 20-pin gull-wing lead form, JEDEC MS-013 compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 19 | 1OE, 2OE | Active-low output enables - Independently disable Group 1 (pins 12,14,16,18) or Group 2 (pins 3,5,7,9) outputs. |
| 2,4,6,8 | 1A0–1A3 | Group 1 data inputs - Connect to upstream source (e.g., microcontroller port) for first 4-bit channel. |
| 12,14,16,18 | 1Y0–1Y3 | Group 1 buffered outputs - Drive downstream 50 Ω transmission lines or parallel bus segments. |
| 11,13,15,17 | 2A0–2A3 | Group 2 data inputs - Accept second 4-bit data stream (e.g., peripheral address lines). |
| 3,5,7,9 | 2Y0–2Y3 | Group 2 buffered outputs - Provide isolated, high-drive output path decoupled from Group 1. |
| 10 | GND | Ground reference - Must be low-inductance connection to minimize ground bounce during switching. |
| 20 | VCC | Power supply - Requires local 100 nF ceramic decoupling adjacent to pin for noise suppression. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent 3-state control | Separate 1OE/2OE pins allow selective isolation of two 4-bit data paths-critical for multiplexed address/data buses. |
| IOFF partial power-down | Outputs enter high-Z state with < ±100 μA leakage when VCC = 0 V-enables live insertion and hot-swap capability. |
| BiCMOS output stage | Combines bipolar speed and CMOS low static power-achieves 4.6 ns max propagation with < 250 μA ICC per enabled section. |
| TTL-compatible inputs | VIH ≥ 2.0 V and VIL ≤ 0.8 V ensure direct interface with 74LS, 74F, and microcontroller GPIO without level shifters. |
| Latch-up immunity | Exceeds 500 mA per JESD78 Class II-prevents destructive latch-up under transient overvoltage or ESD stress. |
Applications
| Memory Address Buffering | Industrial Backplane Interface |
|---|---|
|
Use Scenario: Buffering 8-bit address lines between microcontroller and SRAM/Flash in programmable logic controllers. IC Role / Device Role / Timing Role: Non-inverting 3-state buffer providing drive strength and bus isolation during memory read/write cycles. Use Value: Eliminates signal integrity loss across 15 cm PCB traces while enabling shared bus access with other peripherals via OE control. |
Use Scenario: Interfacing multiple I/O modules to a central controller over a 20 cm parallel backplane in factory automation racks. IC Role / Device Role / Timing Role: Bidirectional bus driver isolating module-specific address/data lanes with independent enable control per group. Use Value: Prevents crosstalk-induced glitches during hot-plug insertion and ensures deterministic timing with <4.6 ns propagation delay. |
| Legacy System Bus Extension | Test Equipment Signal Conditioning |
|
Use Scenario: Extending TTL-level control bus from aging PLC CPU to newly added analog I/O expansion cards. IC Role / Device Role / Timing Role: Level-compatible buffer restoring signal amplitude and edge rate degraded by long trace runs. Use Value: Maintains VIH/VIL margins across 30 cm ribbon cable runs while supporting 20 MHz clocked strobes. |
Use Scenario: Driving calibrated test signals into DUT inputs requiring precise voltage thresholds and fast edge rates. IC Role / Device Role / Timing Role: Precision output driver delivering clean 0.5 V/3.0 V logic transitions with minimal overshoot. Use Value: Reduces measurement uncertainty by limiting VOL to 0.55 V max and tR/tF to <2.5 ns under 50 pF load. |
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 | Dual in-line package (PDIP-20); no IOFF circuitry; higher ICC (max 250 μA vs. 50 μA) | Suitable only for fixed-power systems without hot-swap or partial power-down requirements | Select when legacy through-hole assembly is required and power sequencing is fully controlled. |
| 74LVC244APW | 3.3 V only (1.65–3.6 V); lower drive (±24 mA); no IOFF; TSSOP20 package | Designed for low-voltage mixed-signal systems-not interoperable with 5 V TTL buses | Choose only for new 3.3 V designs where voltage translation is already handled upstream. |
Compared with SN74ABT244N and 74LVC244APW, the 74ABT244DB,112 uniquely combines 5 V TTL compatibility, dual OE control, and IOFF-enabled hot-swap support in a surface-mount SO20 package-making it the sole option for industrial upgrades requiring backward compatibility and safe field maintenance.
Availability
74ABT244DB,112 is available at Aetrix Electronics and suitable for industrial backplane interfaces, memory address buffering, legacy bus extension, and test equipment signal conditioning requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 74ABT244DB,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, discrete, and MOSFET solutions for automotive, industrial, and consumer markets.
The 74ABT244DB,112 belongs to Nexperia's ABT-series advanced bi-directional bus transceivers, engineered specifically for robust 5 V TTL system interfacing with enhanced ESD resilience and partial power-down safety.
FAQ
Does 74ABT244DB,112 support hot-swap insertion?
Yes. Its IOFF circuitry actively disables outputs and limits backflow current to ±100 μA when VCC = 0 V, enabling safe live insertion into powered backplanes or modular systems without disrupting upstream logic or damaging connected devices.
What is the maximum capacitive load this device can drive reliably?
The 74ABT244DB,112 is characterized up to 50 pF load capacitance with guaranteed tPLH/tPHL ≤ 4.6 ns at VCC = 5.0 V. Driving >50 pF may increase propagation delay and cause ringing; for >100 pF, series termination or reduced slew rate design is recommended.
Can both output enable pins (1OE and 2OE) be tied together?
Yes-1OE and 2OE may be paralleled to operate the device as a single 8-bit buffer. However, doing so eliminates independent group control, forfeiting the ability to isolate one 4-bit segment while driving the other, which is critical in multiplexed bus architectures.
Is 74ABT244DB,112 pin-compatible with older 74LS244 variants?
No. While functionally similar, the 74ABT244DB,112 uses different pin assignments: 1OE is on pin 1 (not pin 19), and 2OE is on pin 19 (not pin 1). Direct replacement requires PCB layout revision or adapter routing to match SOT163-1 pinout.
74ABT244DB,112 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- 74ABT
- Package/Case:
- 20-SSOP (0.209", 5.30mm 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-SSOP
74ABT244DB,112 FAQ
1.How can I place an order for 74ABT244DB,112 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74ABT244DB,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 74ABT244DB,112 reliable?
The price and inventory of 74ABT244DB,112 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74ABT244DB,112 is usually 5 days.
3.What payment methods are accepted for 74ABT244DB,112?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74ABT244DB,112 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74ABT244DB,112?
74ABT244DB,112 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74ABT244DB,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 74ABT244DB,112?
For technical support, including 74ABT244DB,112 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74ABT244DB,112 requirements.
6.How does Aetrix verify that 74ABT244DB,112 is sourced from the original manufacturer or authorized distributors?
All 74ABT244DB,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 74ABT244DB,112 meets industry standards.
7.What is the process for return or replacement of 74ABT244DB,112?
All 74ABT244DB,112 units undergo pre-shipment inspection (PSI). If there is an issue with 74ABT244DB,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 74ABT244DB,112 part is unused and in its original packaging.
Return procedure for 74ABT244DB,112:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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