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74AC244MTC
onsemi
IC BUFF NON-INVERT 6V 20TSSOP
1277 Pcs New Original In Stock
Buffer, Non-Inverting 2 Element 4 Bit per Element 3-State Output 20-TSSOP
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5.0 / 5.0
- (509 Ratings)
74AC244MTC
Product Overview
7745854
DiGi Electronics Part Number
74AC244MTC-DGManufacturer
onsemi
74AC244MTC
Description
IC BUFF NON-INVERT 6V 20TSSOPInventory
1277 Pcs New Original In Stock
Buffer, Non-Inverting 2 Element 4 Bit per Element 3-State Output 20-TSSOP
Quantity
Minimum 1
Minimum 1
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74AC244MTC Technical Specifications
Category
Logic, Buffers, Drivers, Receivers, Transceivers
Packaging
Tube
Series
74AC
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
2V ~ 6V
Operating Temperature
-40°C ~ 85°C (TA)
Mounting Type
Surface Mount
Package / Case
20-TSSOP (0.173", 4.40mm Width)
Supplier Device Package
20-TSSOP
Base Product Number
74AC244
Datasheet & Documents
HTML Datasheet
74AC244MTC-DG
Environmental & Export Classification
RoHS Status
ROHS3 Compliant
Moisture Sensitivity Level (MSL)
1 (Unlimited)
REACH Status
REACH Unaffected
ECCN
EAR99
HTSUS
8542.39.0001
Additional Information
Standard Package
75
Alternative Parts
PART NUMBER
MANUFACTURER
QUANTITY AVAILABLE
DiGi PART NUMBER
UNIT PRICE
SUBSTITUTE TYPE
Reviews
5.0/5.0-(Show up to 5 Ratings)
December 02, 2025
Ma commande est arrivée très vite, en moins de temps que prévu. La résistance des composants est réellement impressionnante.
December 02, 2025
Je suis étonné par la vitesse avec laquelle mon achat est arrivé. L'emballage était soigné, ce qui montre leur sérieux.
December 02, 2025
Jede Bestellung wurde sorgfältig verpackt und der Kundenservice war immer zuvorkommend und freundlich.
December 02, 2025
Sehr schnelle Versandabwicklung und erstklassiger After-Sales-Service.
December 02, 2025
物流の管理がしっかりしていて、トラブルもほとんどありません。
December 02, 2025
Their shipping process is transparent and reliable, giving us peace of mind with every order.
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Frequently Asked Questions (FAQ)
How can I ensure signal integrity when using the 74AC244MTC in a high-speed bus application with multiple loads?
When using the 74AC244MTC in a high-speed bus configuration, manage signal integrity by minimizing trace lengths and avoiding stubs, as the AC family has fast edge rates that can cause ringing. Use series damping resistors (22–47 Ω) near the driver outputs if driving long or unterminated lines. The 74AC244MTC's 24mA drive strength can overload transmission lines if not properly matched—consider using series RC termination or controlled impedance routing, especially when operating near 5V and high clock rates. Also ensure solid ground return paths and avoid routing sensitive signals near high-current 3-state transitions to prevent ground bounce on the 74AC244MTC's shared bus outputs.
Can the 74AC244MTC replace a 74HC244 in a 3.3V mixed-voltage system, and what are the risks?
The 74AC244MTC can generally replace a 74HC244 in a 3.3V system due to similar logic thresholds and pin compatibility, but key risks exist. The 74AC244MTC has higher speed and faster rise/fall times than the 74HC244, increasing EMI and potential signal overshoot in poorly terminated designs. At 3.3V, input thresholds differ—74AC devices have CMOS thresholds (~0.5×VCC), which may be less noise-immune than 74HC's TTL-compatible inputs. If input signals come from legacy 5V TTL sources without level shifting, verify VIH compliance. Always confirm that the 3-state bus timing margins accommodate the faster switching of the 74AC244MTC versus the 74HC244 in the target application.
What PCB layout guidelines should I follow for the 74AC244MTC to avoid power supply noise issues in a dense logic array?
To minimize supply noise with the 74AC244MTC in dense logic layouts, place a 0.1µF ceramic bypass capacitor as close as possible to each VCC pin (pins 20 and 10 on the 20-TSSOP package), with short, direct traces to ground. Add a bulk 1–10µF capacitor nearby for transient current support. Due to the fast switching and 24mA output drive of the 74AC244MTC, use a solid ground plane and avoid daisy-chaining ground connections. Route sensitive analog or clock signals away from 74AC244MTC outputs to prevent coupling, and consider staggered switching by skewing enable signals if multiple 74AC244MTC devices toggle simultaneously, reducing peak ground current spikes.
Is the 74AC244MTC a suitable drop-in replacement for the 74ACT244N in a legacy 5V TTL system, and how do output drive levels compare?
The 74AC244MTC can replace the 74ACT244N in most 5V systems with minor trade-offs. Both operate at 5V and have 24mA output drive, but the 74ACT244N includes TTL-compatible input thresholds (VT+ ~2V), while the 74AC244MTC uses pure CMOS thresholds (~2.5V), making it more susceptible to noise on slow-rising inputs. If driving from older TTL logic with marginal VOH (e.g., 3.5V), ensure the 74AC244MTC input reliably registers HIGH. For output compatibility, both meet TTL drive requirements, but the 74AC244MTC may generate more overshoot on unterminated lines due to faster edges—add series resistors if needed. Confirm timing specs of the 74AC244MTC vs. 74ACT244N for setup/hold margins in high-speed paths.
What reliability concerns should I consider when using the 74AC244MTC in an industrial environment with wide temperature cycling?
When deploying the 74AC244MTC in industrial environments subject to thermal cycling, its rated -40°C to +85°C operating range is sufficient for most cases, but focus on PCB-level reliability. The 20-TSSOP package has leads prone to fatigue under mechanical stress—ensure adequate board support and avoid point loading. Monitor solder joint integrity in high-vibration settings; consider using conformal coating. Although the 74AC244MTC has MSL1 (unlimited floor life), store and handle in ESD-safe conditions due to its CMOS construction. Additionally, voltage rails should be clean and regulated, as supply noise near temperature extremes can induce latch-up—implement local decoupling and guard rings in high-reliability designs using the 74AC244MTC.
Quality Assurance (QC)
DiGi ensures the quality and authenticity of every electronic component through professional inspections and batch sampling, guaranteeing reliable sourcing, stable performance, and compliance with technical specifications, helping customers reduce supply chain risks and confidently use components in production.
74AC244MTC CAD Models
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