SN74LS107ADG4 Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
SN74LS107ADG4 is a dual negative-edge-triggered JK flip-flop IC in the LS TTL logic family, housed in a 14-pin SOIC package. Each element has independent J, K, clock, and active-low asynchronous clear inputs with complementary Q and Q-bar outputs. It supports a maximum toggle frequency of 30 MHz and is used in binary counters, shift registers, and digital state machines.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 14
- Lifecycle
- OBSOLETE
- Datasheet
- SN74LS107ADG4 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 SN74LS107ADG4?
- 2 independent negative-edge-triggered JK flip-flops with individual J, K, and clock inputs
- 30 MHz maximum toggle frequency in the LS (Low-power Schottky) logic family
- Asynchronous active-low direct clear for each flip-flop, independent of the clock
- Complementary Q and Q-bar outputs for toggle, divide-by-two, and feedback configurations
- 14-pin SOIC SMD package with 3.81 mm row spacing for compact PCB placement
- 8 mA sink current output compatible with LS and CMOS fanout requirements
What is SN74LS107ADG4 used for?
SN74LS107ADG4 is used in digital frequency dividers, binary ripple counters, and synchronous state machines where negative-edge-triggered clocking and direct clear capability are required. It is a fundamental building block in educational electronics labs and legacy 5 V TTL circuit designs for clock division and sequence generation. Industrial programmable controllers and interface cards also use it as a simple 2-bit state element for handshake and ready/busy flag logic in bus arbitration circuits.
What are the specifications of SN74LS107ADG4?
| YTEOL | 0 |
| Family | LS |
| JESD-30 Code | R-PDSO-G14 |
| JESD-609 Code | e4 |
| Load Capacitance (CL) | 15pF |
| Logic IC Type | J-K FLIP-FLOP |
| Max Frequency@Nom-Sup | 30000000Hz |
| Max I(ol) | 0.008A |
| Number of Bits | 2 |
| Number of Functions | 2 |
| Output Polarity | COMPLEMENTARY |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SOP14,.25 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE |
| Packing Method | TUBE |
| Peak Reflow Temperature (Cel) | 260 |
| Power Supply Current-Max (ICC) | 6mA |
| Prop. Delay@Nom-Sup | 20ns |
| Propagation Delay (tpd) | 20ns |
| 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 | NEGATIVE EDGE |
| fmax-Min | 30MHz |
| Package | Small Outline Packages |
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 SN74LS107ADG4 datasheet?
SN74LS107ADG4 Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for SN74LS107ADG4?
Compatible alternatives and drop-in replacements for SN74LS107ADG4:
Flip-Flop, LS Series, 2-Func, Negative Edge Triggered, 2-Bit, Complementary Output, TTL, PDSO14
J-K Flip-Flop, LS Series, 2-Func, Negative Edge Triggered, 2-Bit, Complementary Output, TTL, PDSO16
Frequently Asked Questions
How does the negative-edge triggering of SN74LS107ADG4 affect timing in a counter circuit?
SN74LS107ADG4 latches the J and K inputs and updates its outputs on the falling edge of the clock signal, meaning the flip-flop captures data during the high phase and transitions on the negative clock transition. In a ripple counter application, the Q-bar output of the first flip-flop drives the clock of the second, so each stage divides the frequency by 2. At 30 MHz maximum clock frequency, a 2-stage chain from SN74LS107ADG4 produces a divide-by-4 output at 7.5 MHz from a 30 MHz input clock.
Can the individual asynchronous clears on SN74LS107ADG4 be used to initialize a counter to a non-zero state?
The asynchronous direct clear on each flip-flop only forces the Q output to logic low, so it cannot directly preset a flip-flop to logic high. To initialize a counter to a non-zero state, the J and K inputs must be configured to load the desired bit value on the next clock edge while holding clear inactive. For example, setting J high and K low on a stage causes Q to go high on the next negative clock edge, achieving a programmed initial count without needing a separate preset pin.
What is the power supply voltage and current consumption for SN74LS107ADG4?
SN74LS107ADG4 operates from a 5 V supply with the LS-TTL input voltage thresholds of 0.8 V for logic low and 2.0 V for logic high. At 5 V, a typical LS-family dual flip-flop draws approximately 12 mA of quiescent supply current at maximum switching frequency. The 8 mA maximum output sink current per pin supports driving additional LS loads with a calculated fanout of up to 20 standard LS inputs without violating the I_OL specification.
Is SN74LS107ADG4 in a 14-pin SOIC pin-compatible with older 14-pin DIP versions of the 74107 device?
SN74LS107ADG4 is electrically and functionally pin-compatible with the 14-pin DIP 74LS107A, with the same pin numbering for J1, K1, CLK1, CLR1, Q1, Q1-bar, and their counterparts on the second flip-flop. The SOIC package has a smaller 3.81 mm row spacing and 1.27 mm pin pitch compared to the 7.62 mm row and 2.54 mm pitch of the DIP, so a PCB footprint change is required to migrate from through-hole to surface-mount but no firmware or logic changes are needed.
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
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