SN74LS373N Texas Instruments Integrated Circuit (Dual-In-Line Packages) In Stock
The SN74LS373N is an octal D-type transparent latch and edge-triggered flip-flop IC from Texas Instruments in the 74LS logic family. It provides 8 latches with active-low output enable control and a 45 pF load capacitance, housed in a 20-pin DIP package. Available in stock worldwide with competitive pricing and fast global shipping.
- Manufacturer
- Texas Instruments
- Package
- Dual-In-Line Packages
- Pin Count
- 20
- Lifecycle
- ACTIVE
- Datasheet
- SN74LS373N Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.3000(MOQ 1)
- Temp Range
- ?°C to 70.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Octal (8-bit) transparent latch with independent output enable control, enabling efficient bus buffering in a single 20-pin DIP package
- Active-low output enable (3-state outputs) allows multiple devices to share a common data bus without signal contention
- TTL-compatible LS-series logic with 24 mA output sink current and 45 pF load capacitance for reliable high-speed bus driving
Applications
The SN74LS373N is widely used as a data bus buffer and address latch in microprocessor systems, where it temporarily holds address or data bus values during demultiplexed bus cycles. It is commonly deployed in memory interfacing circuits, I/O port expansion, and programmable logic controller (PLC) systems requiring reliable 8-bit data latching. Its 3-state outputs also make it suitable for bidirectional bus architectures in industrial and embedded computing applications.
Specifications
| Pbfree Code | Yes |
| YTEOL | 15 |
| Control Type | ENABLE LOW |
| Count Direction | UNIDIRECTIONAL |
| Family | LS |
| JESD-30 Code | R-PDIP-T20 |
| JESD-609 Code | e4 |
| Load Capacitance (CL) | 45pF |
| Logic IC Type | BUS DRIVER |
| Max I(ol) | 0.024A |
| Number of Bits | 8 |
| Number of Functions | 8 |
| Number of Ports | 2 |
| Output Characteristics | 3-STATE |
| Output Polarity | TRUE |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | DIP20,.3 |
| Package Shape | RECTANGULAR |
| Package Style | IN-LINE |
| Packing Method | TUBE |
| Power Supply Current-Max (ICC) | 40mA |
| Prop. Delay@Nom-Sup | 30ns |
| Propagation Delay (tpd) | 30ns |
| Qualification Status | Not Qualified |
| Supply Voltage-Max (Vsup) | 5.25V |
| Supply Voltage-Min (Vsup) | 4.75V |
| Supply Voltage-Nom (Vsup) | 5V |
| Surface Mount | NO |
| Technology | TTL |
| Temperature Grade | COMMERCIAL |
| Terminal Finish | Nickel/Palladium/Gold (Ni/Pd/Au) |
| Terminal Form | THROUGH-HOLE |
| Terminal Pitch | 2.54mm |
| Terminal Position | DUAL |
| Trigger Type | POSITIVE EDGE |
| ## SN74LS373N Alternates Showing results | Image |
| Package | Dual-In-Line Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.90 |
| Country of Origin | Malaysia |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for SN74LS373N:
Frequently Asked Questions
What is the output drive capability of the SN74LS373N?
The SN74LS373N has a maximum output low current (I(ol)) of 24 mA, which supports driving TTL-compatible loads on data buses. This makes it suitable for interfacing with multiple downstream logic devices on a shared bus without external buffering.
How does the transparent latch function work in the SN74LS373N?
In transparent mode, when the latch enable input is high, data at the D inputs passes directly to the outputs. When the enable goes low, the last data state is latched and held regardless of input changes, making it ideal for demultiplexed address/data bus applications.
What package does the SN74LS373N use and how many pins does it have?
The SN74LS373N is housed in a 20-pin plastic dual-in-line package (PDIP), indicated by the JESD-30 code R-PDIP-T20. This through-hole package is well-suited for prototyping, repair, and legacy board designs where DIP sockets are used.
Is the SN74LS373N compatible with modern 3.3V logic systems?
The SN74LS373N is a 5V TTL-family device (74LS series) and is not directly compatible with 3.3V logic without level shifting. For 3.3V designs, Texas Instruments recommends using the 74LVC or 74ALVC series equivalents such as SN74LVC373A, which support 3.3V operation.
What are common substitute or equivalent parts for the SN74LS373N?
Common alternatives include the SN74ALS373C for faster switching, SN74HCT373 for CMOS-compatible operation at 5V, and SN74LVC373A for 3.3V low-voltage applications. All offer the same 8-bit transparent latch function with 3-state outputs in similar package options.
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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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| 1+ | $0.6000 | $0.60 |
| 9+ | $0.5000 | $4.50 |
| 41+ | $0.4000 | $16.40 |
| 121+ | $0.3000 | $36.30 |
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