SN74ALS163BDBRE4 Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
The SN74ALS163BDBRE4 is a 4-bit synchronous binary counter with synchronous clear, preset load, and carry output in the ALS logic family, operating up to 40 MHz with 50 pF load capacitance in a 16-pin SSOP package. It suits digital timing, frequency division, and state machine designs. From $0.75 in stock worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 16
- Lifecycle
- OBSOLETE
- Datasheet
- SN74ALS163BDBRE4 Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- ?°C to 70.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of SN74ALS163BDBRE4?
- 4-bit synchronous up-counter with synchronous clear and load
- Maximum count frequency of 40 MHz at nominal supply
- Terminal count output (TCO) for cascaded counter chains
- ALS logic family: fast switching with low power consumption
- RoHS-compliant lead-free 16-pin SSOP package
- Parallel load enable for programmable initial count values
What is SN74ALS163BDBRE4 used for?
The SN74ALS163BDBRE4 is widely used in digital timing and frequency division circuits, including clock dividers, address counters for memory sequencing, and state machine implementations in FPGA glue logic. Its synchronous load and clear inputs allow precise counter initialization without glitches, making it reliable in PWM generation and event counting applications. The device also fits legacy industrial control systems and instrumentation designs that use the established ALS logic standard at 5V supply.
What are the specifications of SN74ALS163BDBRE4?
| Pbfree Code | Yes |
| YTEOL | 0 |
| Additional Feature | TCO OUTPUT |
| Count Direction | UP |
| Family | ALS |
| JESD-30 Code | R-PDSO-G16 |
| Load Capacitance (CL) | 50pF |
| Load/Preset Input | YES |
| Logic IC Type | BINARY COUNTER |
| Max Frequency@Nom-Sup | 40000000Hz |
| Max I(ol) | 0.008A |
| Mode of Operation | SYNCHRONOUS |
| Number of Bits | 4 |
| Number of Functions | 1 |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SOP16,.25 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE, SHRINK PITCH |
| Packing Method | TR |
| Peak Reflow Temperature (Cel) | NOT SPECIFIED |
| Power Supply Current-Max (ICC) | 21mA |
| Prop. Delay@Nom-Sup | 20ns |
| Propagation Delay (tpd) | 20ns |
| Qualification Status | Not Qualified |
| Supply Voltage-Max (Vsup) | 5.5V |
| Supply Voltage-Min (Vsup) | 4.5V |
| Supply Voltage-Nom (Vsup) | 5V |
| Surface Mount | YES |
| Technology | TTL |
| Temperature Grade | COMMERCIAL |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.65mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | NOT SPECIFIED |
| Trigger Type | POSITIVE EDGE |
| fmax-Min | 40MHz |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| HTS Code | 8542.39.00.60 |
Where can I find the SN74ALS163BDBRE4 datasheet?
SN74ALS163BDBRE4 Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for SN74ALS163BDBRE4?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What is the maximum counting frequency of the SN74ALS163BDBRE4 and how does it affect cascading designs?
The SN74ALS163BDBRE4 counts synchronously at up to 40 MHz with a 50 pF load capacitance, providing sufficient speed for most digital timing and division applications. When cascading multiple counters using the terminal count output (TCO), each stage introduces propagation delay; designers must verify that the TCO ripple remains within one clock cycle at the target 40 MHz frequency to avoid counting errors.
For a 16-pin SSOP footprint constraint, how does the SN74ALS163BDBRE4 fit into compact PCB designs versus DIP alternatives?
The SN74ALS163BDBRE4 in a 16-pin SSOP package occupies approximately 60% less PCB area than an equivalent 16-pin DIP package, with 0.635 mm pitch between pins compared to 2.54 mm for DIP. This makes it suitable for high-density boards where space for glue logic is limited, while retaining the full 4-bit counter functionality including parallel load and synchronous clear on 5V systems.
In what situations would a digital designer prefer the SN74ALS163BDBRE4's synchronous clear over an asynchronous reset counter?
The SN74ALS163BDBRE4's synchronous clear ensures the counter resets only on the active clock edge, eliminating glitch pulses that asynchronous reset circuits can produce during combinational hazard conditions. This is critical in applications like PWM period registers, address sequencers, and frequency synthesizers where a spurious reset pulse narrower than 1 clock cycle at 40 MHz could corrupt downstream logic or trigger false interrupts.
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About Texas Instruments
Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
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