SN74LS669D Texas Instruments Integrated Circuit (Other) In Stock
SN74LS669D is a synchronous 4-bit up/down binary counter IC from Texas Instruments. Features bidirectional counting, TCO output, and 15pF load capacitance in 16-pin SOIC package. From $2.47, in stock with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Other
- Pin Count
- 16
- Lifecycle
- OBSOLETE
- Datasheet
- SN74LS669D Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $2.4700(MOQ 78)
- 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 SN74LS669D?
- Synchronous 4-bit up/down binary counter with bidirectional count direction control
- TCO (Terminal Count Output) for easy cascading in multi-stage counter designs
- 15pF load capacitance and LS-family TTL logic for reliable high-speed operation
- Load/Preset input enables parallel data loading for flexible counter initialization
- 16-pin SOIC (R-PDSO-G16) package for compact PCB integration
What is SN74LS669D used for?
The SN74LS669D is widely used in digital systems requiring precise event counting and frequency division, such as clocks, timers, and industrial automation controllers. Its bidirectional counting capability makes it ideal for position encoders, motor control circuits, and reversible digital counters. The TCO output simplifies cascading multiple devices for extended counting ranges in test equipment and programmable logic applications.
What are the specifications of SN74LS669D?
| Pbfree Code | No |
| YTEOL | 0 |
| Additional Feature | TCO OUTPUT |
| Count Direction | BIDIRECTIONAL |
| Family | LS |
| JESD-30 Code | R-PDSO-G16 |
| JESD-609 Code | e4 |
| Load Capacitance (CL) | 15pF |
| Load/Preset Input | YES |
| Logic IC Type | BINARY COUNTER |
| Max Frequency@Nom-Sup | 25000000Hz |
| 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 |
| Peak Reflow Temperature (Cel) | 260 |
| Power Supply Current-Max (ICC) | 34mA |
| Prop. Delay@Nom-Sup | 27ns |
| Propagation Delay (tpd) | 27ns |
| Qualification Status | Not Qualified |
| Supply Voltage-Max (Vsup) | 5.25V |
| Supply Voltage-Min (Vsup) | 4.75V |
| Supply Voltage-Nom (Vsup) | 5V |
| Surface Mount | YES |
| Technology | TTL |
| Temperature Grade | COMMERCIAL |
| Terminal Finish | NICKEL PALLADIUM GOLD |
| Terminal Form | GULL WING |
| Terminal Pitch | 1.27mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Trigger Type | POSITIVE EDGE |
| fmax-Min | 25MHz |
| Package | Other |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| HTS Code | 8542.39.00.60 |
Where can I find the SN74LS669D datasheet?
SN74LS669D Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for SN74LS669D?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What is the maximum count range of the SN74LS669D?
The SN74LS669D is a 4-bit binary counter, providing a count range of 0 to 15 (decimal). It supports both up and down counting directions, controlled by the count direction input, making it suitable for bidirectional counting applications in digital systems.
What is the TCO output on the SN74LS669D and how is it used?
The TCO (Terminal Count Output) is a signal that activates when the counter reaches its terminal count — 15 when counting up or 0 when counting down. It is used to cascade multiple SN74LS669D devices together to form wider counters, such as 8-bit or 16-bit configurations, by connecting TCO to the enable input of the next stage.
What package does the SN74LS669D come in and what are its key electrical specs?
The SN74LS669D is housed in a 16-pin SOIC package (JESD-30 code R-PDSO-G16), suitable for surface-mount PCB assembly. Key electrical specs include a 15pF load capacitance (CL), LS-family TTL logic levels, and a JESD-609 code of e4 indicating standard environmental compliance.
Can the SN74LS669D be preset to a specific count value?
Yes, the SN74LS669D features a Load/Preset input that allows parallel loading of a 4-bit value into the counter. This enables the counter to start from any value between 0 and 15, which is useful in applications requiring a specific count offset or modulo-N counting sequences.
What are common alternatives or replacements for the SN74LS669D?
Common alternatives to the SN74LS669D include the SN74LS168 (decade up/down counter), SN74HC669 (CMOS high-speed version), and SN74F669 (fast TTL variant). When selecting a replacement, verify supply voltage compatibility, propagation delay, and output drive strength to ensure drop-in compatibility in your circuit.
Related Guides
CSD87313DMS Synchronous Buck Power Stage Design Guide
Design a compact CSD87313DMS synchronous buck stage with practical guidance for loss, gate drive, PCB layout, EMI, thermal validation, and sourcing.
Aug 6, 2026
STEF05SGR eFuse Selection Guide for 5 V Overcurrent Protection
Choose STEF05SGR for 5 V overcurrent protection by checking current-limit margin, inrush, thermal loss, fault response, and sourcing.
Aug 6, 2026
C0402C103K3RACTU Selection Guide: Choosing a 10 nF 0402 MLCC
Select C0402C103K3RACTU by voltage margin, X7R behavior, tolerance, 0402 assembly risk, and qualified alternatives.
Aug 4, 2026
STM32H753VIT6 MCU Selection Guide: Memory, Package, Connectivity, and Security
Choose STM32H753VIT6 by evaluating memory architecture, LQFP-100 pin fit, connectivity, security, power, and sourcing tradeoffs.
Aug 4, 2026
Why Buy from FindMyChip
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.
More from Texas Instruments
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 78+ | $3.8600 | $301.08 |
| 500+ | $2.7800 | $1390.00 |
| 1000+ | $2.6300 | $2630.00 |
| 10000+ | $2.4700 | $24700.00 |
In Stock · 24h Response · Worldwide Shipping
Response within 24 hours · Worldwide shipping
“Their engineering team helped us find a pin-compatible alternative when our original MCU went EOL.”
You May Also Like
ACS770ECB-200U-PFF-T
Allegro Microsystems
Integrated Circuit
ACS770KCB-150U-PFF-T
Allegro Microsystems
Integrated Circuit
MC33901WEF
NXP
Integrated Circuit
MC7808BDTRKG
ON Semiconductor
Integrated Circuit
PA94EC
Apex Microtechnology
Integrated Circuit
AP7315-28SR-7
Diodes Inc.
Integrated Circuit
74HCT245D
Nexperia
Integrated Circuit
CY62256VNLL-70ZXCT
Cypress Semiconductor
Integrated Circuit
EPM7032AETC44-4N
Intel
Integrated Circuit
EPM3512AQC208-10N
Intel
Integrated Circuit
EPM3256ATC144-7N
Intel
Integrated Circuit
EPM3256AQC208-7N
Intel
Integrated Circuit
EPM3256AQC208-10N
Intel
Integrated Circuit
EPM3128ATC100-7N
Intel
Integrated Circuit
EPM1270F256C4N
Intel
Integrated Circuit
EPF8282ATC100-4N
Intel
Integrated Circuit
EPF6016QC208-2N
Intel
Integrated Circuit
EPF6016ATC144-3N
Intel
Integrated Circuit
EPF10K30ATC144-3N
Intel
Integrated Circuit
EPC2TI32N
Intel
Integrated Circuit
EPC2LC20
Intel
Integrated Circuit
EP3SL150F1152C4N
Intel
Integrated Circuit
EP2SGX60DF780C5N
Intel
Integrated Circuit
EP2SGX60CF780C5N
Intel
Integrated Circuit