My Inquiry
My Account
Nexperia USA Inc. 74ABT244D,623
- Part No.:
- 74ABT244D,623
- Manufacturer:
- Nexperia USA Inc.
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
74ABT244D,623.pdf
- Description:
- IC BUFF NON-INVERT 5.5V 20SO
- Quantity:
- Payment:
- Shipping:
Inventory:4,057
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
74ABT244D,623 from Nexperia is an octal 3-state buffer/line driver in SO20 package, configured as two independent 4-bit buffers with separate active-low output enables (1OE, 2OE). It operates from 4.5 V to 5.5 V, delivers ±32 mA/±64 mA drive capability, supports partial power-down via IOFF, and functions across –40 °C to +85 °C for industrial bus interface applications.
For engineers reviewing the 74ABT244D,623 datasheet, 74ABT244D,623 pinout, 74ABT244D,623 application, or 74ABT244D,623 equivalent, this device is selected for TTL-compatible bidirectional bus buffering where high-speed propagation (≤4.6 ns), robust ESD protection (HBM >2000 V), and live-insertion capability are required in legacy 5 V systems.
Technical Context
The 74ABT244D implements BiCMOS logic architecture to achieve high-speed switching (tPLH/tPHL ≤4.6 ns at VCC = 5.0 V) while maintaining TTL-level input compatibility and rail-to-rail output swing. Its dual 4-bit structure allows flexible partitioning of data paths under independent enable control.
IOFF circuitry actively disables outputs during power-down by clamping leakage to ±100 μA when VCC = 0 V, preventing backflow current. The device complies with JESD78 Class II latch-up immunity (>500 mA) and meets ANSI/ESDA/JEDEC JS-001 Class 2 HBM and JS-002 Class C3 CDM ESD standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply voltage | 4.5 V to 5.5 V - ensures stable operation across industrial 5 V rail tolerances without regulation. |
| Output drive | +64 mA / –32 mA - supports direct driving of heavy capacitive loads or multiple TTL inputs. |
| Propagation delay | ≤4.6 ns (tPLH/tPHL) - enables reliable timing in high-speed 5 V bus systems up to ~200 MHz. |
| IOFF leakage | ±100 μA at VCC = 0 V - prevents damaging back-current during hot-swap or partial power-down sequences. |
| Operating temperature | –40 °C to +85 °C - certified for use in industrial control cabinets and outdoor embedded enclosures. |
| ESD rating | HBM >2000 V, CDM >1000 V - withstands handling and board-level transients without protection diodes. |
| Input compatibility | Direct TTL-level interface - eliminates level-shifting components in legacy 5 V designs. |
Pinout & Package
74ABT244D,623 uses the SO20 (SOT163-1) plastic small outline package: 20-pin, 7.5 mm body width, 1.27 mm lead pitch, gull-wing leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 19 | 1OE, 2OE | Active-low output enables - each controls four corresponding Y outputs; HIGH forces high-impedance state. |
| 2, 4, 6, 8 | 1A0–1A3 | Group 1 input data lines - routed to outputs 1Y0–1Y3 when 1OE = LOW. |
| 11, 13, 15, 17 | 2A0–2A3 | Group 2 input data lines - routed to outputs 2Y0–2Y3 when 2OE = LOW. |
| 12, 14, 16, 18 | 1Y0–1Y3 | Group 1 buffered outputs - three-state, driven by 1A0–1A3 under 1OE control. |
| 3, 5, 7, 9 | 2Y0–2Y3 | Group 2 buffered outputs - three-state, driven by 2A0–2A2 under 2OE control. |
| 10 | GND | Ground reference - common return path for all I/O and supply currents. |
| 20 | VCC | Positive supply - powers internal BiCMOS circuitry; must be decoupled locally. |
Key Features
| Feature | Design Value |
|---|---|
| BiCMOS high-speed architecture | Combines bipolar speed and CMOS low static power - achieves sub-5 ns propagation with <1.5 mA typical ICC per enabled group. |
| Dual independent 4-bit enables | 1OE and 2OE allow selective isolation of two data lanes - simplifies bus arbitration and reduces contention risk. |
| Power-up 3-state | Outputs remain high-impedance until VCC stabilizes - prevents bus conflicts during system power sequencing. |
| Live insertion support | IOFF + latch-up immunity (>500 mA) enables safe hot-plug into powered backplanes - critical for modular industrial systems. |
| TTL-compatible input thresholds | VIH = 2.0 V min, VIL = 0.8 V max - interfaces directly with legacy 5 V TTL without pull-ups or translators. |
Applications
| Industrial PLC Backplane Buffering | Legacy 5 V CPU Bus Extension |
|---|---|
|
Use Scenario: Isolating and extending parallel address/data buses between CPU modules and I/O expansion cards in programmable logic controllers. IC Role / Device Role / Timing Role: Bidirectional 3-state buffer that segments bus traffic, prevents signal reflection, and enforces clean enable-controlled handshaking. Use Value: Enables deterministic bus arbitration using discrete OE signals, reducing timing skew versus multiplexed alternatives while supporting >200 MHz effective throughput. |
Use Scenario: Driving long traces on legacy x86 or microcontroller development boards where fan-out exceeds native GPIO capability. IC Role / Device Role / Timing Role: Low-skew line driver amplifying weak microcontroller outputs to meet TTL load requirements across 10+ inch PCB runs. Use Value: Delivers +64 mA sink current to overcome trace capacitance and maintain VIH/VIL margins at 5 V, eliminating need for discrete transistor arrays. |
| Hot-Swappable Module Interface | Test Equipment Signal Conditioning |
|
Use Scenario: Interfacing field-replaceable sensor modules into powered mainframes in factory automation systems. IC Role / Device Role / Timing Role: Bus isolator with IOFF-enabled safe insertion - blocks backfeed current when module is inserted mid-operation. Use Value: Eliminates requirement for complex power sequencing circuitry; permits maintenance without system shutdown, verified per JESD78 Class II latch-up spec. |
Use Scenario: Level-shifting and impedance matching between FPGA I/O banks and external test fixtures in ATE systems. IC Role / Device Role / Timing Role: Precision 3-state buffer providing controlled rise/fall times (≤2.5 ns) and defined VOL/VOH for repeatable measurement calibration. Use Value: Ensures <0.55 V VOL at 64 mA load and <2.0 V VOH at –32 mA, enabling accurate DC parametric testing without additional compensation. |
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 | Same ABT logic family, DIP-20 package; higher thermal resistance (RθJA ≈ 70 °C/W vs. SO20's 55 °C/W); no IOFF circuitry. | Limited to fixed-mount, non-hot-swap applications due to missing IOFF and larger footprint. | Select only for through-hole prototyping or legacy DIP-based systems where thermal derating is acceptable. |
| 74LVC244APW | Lower-voltage 3.3 V operation (1.65–3.6 V); CMOS-only process; ±24 mA drive; no IOFF; -40 °C to +125 °C range. | Requires level translation for 5 V buses; unsuitable for direct TTL replacement but preferred for modern low-power mixed-voltage designs. | Choose when migrating to 3.3 V domains or when extended temperature range outweighs 5 V compatibility needs. |
Compared with SN74ABT244N and 74LVC244APW, the 74ABT244D,623 uniquely combines 5 V TTL compatibility, SO20 space efficiency, and IOFF-enabled hot-swap safety-making it irreplaceable in industrial 5 V backplane upgrades requiring zero-modification drop-in integration.
Availability
74ABT244D,623 is available at Aetrix Electronics and suitable for industrial PLC backplane buffering, legacy 5 V CPU bus extension, hot-swappable module interface, and test equipment signal conditioning requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 74ABT244D,623 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 specializing in high-performance, high-reliability logic, analog, and discrete components for industrial, automotive, and computing markets.
The 74ABT series targets robust 5 V digital interfacing in harsh environments, delivering BiCMOS speed and drive strength with enhanced ESD/latch-up immunity for mission-critical industrial control systems.
FAQ
Does 74ABT244D,623 support mixed-voltage operation between 3.3 V and 5 V systems?
No. The 74ABT244D,623 is specified only for 4.5 V to 5.5 V VCC operation and TTL-compatible input thresholds (VIH ≥2.0 V, VIL ≤0.8 V). It cannot safely interface with 3.3 V logic without external level-shifting circuitry, as its inputs are not 5 V-tolerant in 3.3 V supply contexts and its outputs exceed 3.3 V rail limits.
What is the maximum capacitive load the 74ABT244D,623 can drive while maintaining specified propagation delay?
The datasheet specifies dynamic characteristics with CL = 50 pF (Table 9). At this load and VCC = 5.0 V, tPLH/tPHL remains ≤4.6 ns. Driving >50 pF increases delay nonlinearly; for 100 pF, measured tPLH rises to ~6.2 ns. Maintain CL ≤50 pF for guaranteed timing compliance in high-speed bus applications.
How does the IOFF feature behave when VCC is ramping during power-up?
IOFF activates when VCC drops below ~2.1 V and remains active until VCC exceeds ~2.1 V (per Section 9 footnote [1]). During power-up, outputs stay in high-impedance state until VCC crosses this threshold, then transition to functional mode only after stabilization - ensuring no bus contention during supply ramp.
Can both output enable pins (1OE and 2OE) be tied together for single-enable operation?
Yes. Connecting 1OE and 2OE to a common control signal is electrically valid and commonly used to simplify logic control. Doing so configures the device as a unified 8-bit buffer with shared enable, retaining full 3-state functionality and drive capability across all eight outputs simultaneously.
74ABT244D,623 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- 74ABT
- Package/Case:
- 20-SOIC (0.295", 7.50mm 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:
- 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-SO
74ABT244D,623 FAQ
1.How can I place an order for 74ABT244D,623 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74ABT244D,623 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 74ABT244D,623 reliable?
The price and inventory of 74ABT244D,623 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74ABT244D,623 is usually 5 days.
3.What payment methods are accepted for 74ABT244D,623?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74ABT244D,623 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74ABT244D,623?
74ABT244D,623 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74ABT244D,623 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 74ABT244D,623?
For technical support, including 74ABT244D,623 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74ABT244D,623 requirements.
6.How does Aetrix verify that 74ABT244D,623 is sourced from the original manufacturer or authorized distributors?
All 74ABT244D,623 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 74ABT244D,623 meets industry standards.
7.What is the process for return or replacement of 74ABT244D,623?
All 74ABT244D,623 units undergo pre-shipment inspection (PSI). If there is an issue with 74ABT244D,623, 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 74ABT244D,623 part is unused and in its original packaging.
Return procedure for 74ABT244D,623:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
74ABT244D,623 Tags
-
SN74LVC1G17DBVR
Texas Instruments
-
SN74LVC1G07DCKR
Texas Instruments
-
SN74LVC1G17DCKR
Texas Instruments
-
SN74LVC1G07DBVR
Texas Instruments
-
SN74LVC1G125DCKR
Texas Instruments
-
SN74AHCT1G126DBVR
Texas Instruments
-
SN74LVC1G125DBVR
Texas Instruments
-
SN74AHCT1G125DBVR
Texas Instruments
-
SN74LVC2G17DBVR
Texas Instruments
-
SN74LVC2G07DCKR
Texas Instruments
-
SN74LVC1G34DCKR
Texas Instruments
-
SN74LVC2G17DCKR
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
