SN74LS75DE4 Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
SN74LS75DE4 is a 4-channel transparent D-type latch IC from Texas Instruments in the LS logic family, featuring totem-pole outputs and a 15 pF load capacitance rating. It is housed in a 16-pin SOIC package for easy PCB integration. Available in tube packaging with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 16
- Lifecycle
- OBSOLETE
- Datasheet
- SN74LS75DE4 Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- ?°C to 70.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 4-channel transparent D-type latch with dual-function outputs for versatile bus-hold and data storage applications
- Totem-pole output structure with 8 mA sink current (I_OL) for direct LED or bus driving without external buffers
- 15 pF load capacitance specification enabling reliable operation at standard TTL-compatible logic speeds
- 16-pin SOIC package (R-PDSO-G16) providing ease of hand soldering and automated SMT assembly
- LS family logic ensuring broad compatibility with 5 V TTL and CMOS systems
Applications
The SN74LS75DE4 is commonly used as a data register or bus interface latch in 5 V microcontroller and microprocessor designs, holding 4 bits of parallel data on address or data buses while the enable line is active. It is found in LED driver circuits, seven-segment display decoders, and industrial control panels where transparent latching of 4-bit nibbles is needed without dedicated microcontroller GPIO. Legacy and retrofit designs that must interface with 5 V TTL backplanes rely on this LS-family latch for its guaranteed noise immunity and totem-pole drive strength.
Specifications
| YTEOL | 0 |
| Family | LS |
| JESD-30 Code | R-PDSO-G16 |
| JESD-609 Code | e4 |
| Load Capacitance (CL) | 15pF |
| Logic IC Type | D LATCH |
| Max I(ol) | 0.008A |
| Number of Bits | 2 |
| Number of Functions | 2 |
| Output Characteristics | TOTEM-POLE |
| Output Polarity | COMPLEMENTARY |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SOP16,.25 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE |
| Packing Method | TUBE |
| Peak Reflow Temperature (Cel) | 260 |
| Power Supply Current-Max (ICC) | 12mA |
| 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 | HIGH LEVEL |
| 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 |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for SN74LS75DE4:
Latch, LS Series, 4-Func, High Level Triggered, 2-Bit, Complementary Output, TTL, PDSO16
Frequently Asked Questions
How many data bits does the SN74LS75DE4 latch, and how does the transparent mode work?
The SN74LS75DE4 latches 4 bits of data across its 2 dual-bit function sections. In transparent mode, when the enable input is HIGH, the Q outputs follow the D inputs in real time. When enable goes LOW, the last data state is latched and held regardless of D input changes, with a 15 pF load capacitance spec governing propagation delay.
What is the output drive capability of the SN74LS75DE4, and can it drive LEDs directly?
The SN74LS75DE4 has totem-pole outputs with a maximum sink current (I_OL) of 8 mA per output. This is sufficient to drive a standard 5 mm LED with a 330-ohm series resistor at 3 V forward drop, but for arrays of more than 2 LEDs per channel a dedicated buffer or driver IC is recommended to avoid exceeding the 8 mA I_OL limit.
Is the SN74LS75DE4 still in production, and what are the supply chain risks?
The SN74LS75DE4 carries a YTEOL rating of 0, indicating it is at or near end-of-life. Buyers should immediately check distributor stock levels, consider placing last-time-buy orders, and evaluate pin-compatible replacements such as the SN74HCT75 or SN74AHCT573 which offer improved speed and lower power consumption at 5 V supply.
Which package does the SN74LS75DE4 use, and how does it compare to DIP alternatives?
The SN74LS75DE4 is packaged in a 16-pin SOIC (R-PDSO-G16) with a 1.27 mm pitch, occupying roughly 60% less board area than the through-hole 16-pin DIP equivalent. This makes it well-suited for space-constrained SMT boards, though prototype builders should note that SOIC requires finer soldering equipment compared to DIP packages with 2.54 mm lead spacing.
In what circuit topologies is the SN74LS75DE4 preferred over a flip-flop for data storage?
The SN74LS75DE4 is preferred over edge-triggered flip-flops in designs where the data bus must be monitored continuously and captured only when an enable or chip-select line goes inactive, such as 8-bit address demultiplexing on multiplexed address/data buses. Its transparent mode allows zero-delay pass-through during the write phase, while the latch holds the 4-bit value stable for downstream decoding at propagation delays typically under 25 ns at 5 V.
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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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