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Home > Products > Integrated Circuits (ICs) > Logic - Counters, Dividers > 74ACT161MTC
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74ACT161MTC

Manufacturer Part Number:
74ACT161MTC
Manufacturer / Brand
onsemi
Part of Description:
IC BINARY COUNTER 4-BIT 16TSSOP
Datasheets:
74ACT161MTC(1).pdf74ACT161MTC(2).pdf74ACT161MTC(3).pdf
Lead Free Status / RoHS Status:
RoHS Compliant
Stock Condition:
New original, 9557 pcs Stock Available.
ECAD Model:
Ship From:
Hong Kong
Shipment Way:
DHL/Fedex/TNT/UPS

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Part Number 74ACT161MTC
Manufacturer / Brand onsemi
Stock Quantity 9557 pcs Stock
Category Integrated Circuits (ICs) > Logic - Counters, Dividers
Description IC BINARY COUNTER 4-BIT 16TSSOP
Lead Free Status / RoHS Status: RoHS Compliant
Voltage - Supply 4.5 V ~ 5.5 V
Trigger Type Positive Edge
Timing Synchronous
Supplier Device Package 16-TSSOP
Series 74ACT
Reset Asynchronous
Package / Case 16-TSSOP (0.173', 4.40mm Width)
Package Tube
Operating Temperature -40°C ~ 85°C
Number of Elements 1
Number of Bits per Element 4
Mounting Type Surface Mount
Logic Type Binary Counter
Direction Up
Count Rate 125 MHz
Base Product Number 74ACT161

Packaging & ESD

Industry-standard static shielding packaging is used for electronic components.Anti-static, light-transparent materials allow easy identification of ICs and PCB assemblies.
The packaging structure provides electrostatic protection based on Faraday cage principles.This helps protect sensitive components from static discharge during handling and transportation.


All products are packed in ESD-safe anti-static packaging. Outer packaging labels include part number, brand, and quantity for clear identification. Goods are inspected prior to shipment to ensure proper condition and authenticity.

ESD protection is maintained throughout packing, handling, and global transportation. Secure packaging provides reliable sealing and resistance during transit. Additional cushioning materials are applied when required to protect sensitive components.

QC(Part Testing by IC Components)Quality Warranty

We can offer worldwide express delivery service, such as DHLor FedEx or TNT or UPS or other forwarder for shipment.

Global Shipment by DHL/FedEx/TNT/UPS

Shipping Fees reference DHL/FedEx
1). You can offer your express delivery account for shipment, ifyou haven’t any express account for shipment, we can offer our account inadvance.
2). Use our account for shipment, Shipment charges(Reference DHL/FedEx, Different Countries has different price.)
Shipment charges： (Reference DHL and FedEX)
Weight(KG): 0.00kg-1.00kg Price(USD$) : USD$60.00
Weight(KG): 1.00kg-2.00kg Price(USD$) : USD$80.00
* The price of cost is reference with DHL/FedEx. The detail charges, please contact us. Different country the express charges are different.



We accept the payment terms: Telegraphic Transfer(T/T), Credit Card, PayPal and Western Union.

PayPal:

PayPal Bank Information:
Company Name : IC COMPONENTS LTD
Paypal ID: Info@IC-Components.com

BANK TRANSFAR (Telegraphic Transfer)

Payment For Telegraphic Transfers:
Company Name : IC COMPONENTS LTD Beneficiary Account Number : 549-100669-701
Beneficiary Bank name : Bank of Communications (Hong Kong) Ltd Beneficiary Bank Code : 382 (for local payment)
Beneficiary Bank SWIFT : COMMHKHK
Beneficiary Bank Address : Tsuen Wan Market Street Branch 53 Market Street, Tsuen Wan N.T., Hong Kong

Any inquires or questions, please kindly contact us Email: Info@IC-Components.com


Frequently Asked Questions

Can the 74ACT161MTC be used in a 3.3V system without level shifting or voltage translation?
The 74ACT161MTC operates from 4.5V to 5.5V, so it is not compatible with a 3.3V supply without external circuitry. Attempting direct connection may result in undefined logic states or damage due to insufficient input high thresholds. A level-shifting buffer or translator is required for reliable operation in 3.3V systems.
What happens if the asynchronous reset of the 74ACT161MTC is left floating during power-up?
If the asynchronous reset (MR) pin is left floating, it may float to an indeterminate voltage level, causing unpredictable reset behavior at startup. This can lead to incorrect initial state or erratic counting. A pull-up resistor should be connected to ensure a defined logic high when not actively driven low.
Is the 74ACT161MTC suitable for use in automotive-grade temperature applications?
No, the 74ACT161MTC has an operating temperature range of -40°C to 85°C. It does not meet the more stringent requirements of automotive environments, which often require -40°C to 125°C or wider. For automotive use, a qualified part such as those in the AEC-Q100 compliant series would be necessary.
How does the propagation delay of the 74ACT161MTC affect synchronous cascading with other counters?
With a typical propagation delay of around 3–4 ns per stage, the 74ACT161MTC must be carefully timed when cascaded with other counters. Clock skew and cumulative delay can cause race conditions or missed counts. Designers should account for total propagation delay across multiple stages to maintain correct synchronization.
Can the 74ACT161MTC replace the CD74HC161 in a legacy design without modifying the PCB layout?
While functionally similar, the 74ACT161MTC operates at a higher speed (125 MHz vs. typically 30–50 MHz for HC) and has different voltage thresholds. Although the package is compatible (16-TSSOP), timing margins and noise immunity may differ. Substitution without simulation or testing is not recommended.
What are the risks of using the 74ACT161MTC in high-noise industrial environments without additional filtering?
The 74ACT161MTC offers moderate noise immunity, but in high-inductive or electrically noisy environments, uncontrolled signals on the clock, data, or reset lines can cause glitches that trigger false counts. Proper decoupling capacitors, signal termination, and shielding are essential to ensure reliable operation.
Is it safe to drive the enable inputs (PE, TE) of the 74ACT161MTC directly from microcontroller GPIOs at 5V?
Yes, the 74ACT161MTC accepts standard TTL/CMOS-compatible inputs and can be driven directly by a 5V microcontroller. The ACT family provides full compatibility across voltage ranges within its supply limits (4.5V–5.5V), ensuring reliable signal interpretation without level shifting.
How should the carry output (RCO) of the 74ACT161MTC be handled when cascading multiple units?
The RCO pin asserts only when the counter reaches its maximum value (15) and the clock enable (TE) is active. To avoid race conditions during cascade transitions, the RCO of one stage should feed into the TE of the next. Careful timing analysis is needed to ensure the downstream unit enables before the next clock edge arrives.
Can the 74ACT161MTC be used in battery-powered applications with frequent sleep/wake cycles?
Yes, but only if the system maintains the 4.5V–5.5V supply rail during active periods. During deep sleep, the device should be powered down to prevent leakage current from draining the battery. Wake-up logic must ensure stable reset and clock signals before enabling operation to avoid transient errors.
Are there any known issues with long-term reliability when soldering the 74ACT161MTC via reflow in mass production?
The 74ACT161MTC has an MSL rating of 1, indicating no sensitivity to moisture and suitability for standard reflow processes. As long as standard JEDEC-compliant soldering profiles are followed, including adequate pre-baking if needed, long-term reliability is expected under normal assembly conditions.

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74ACT161MTC

74ACT161MTC

onsemi

IC BINARY COUNTER 4-BIT 16TSSOP

In Stock: 9557

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