SN74AHC373DWG4 Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
SN74AHC373DWG4 is an octal D-type transparent latch with 3-state outputs from Texas Instruments in a 20-pin SOIC package. It features AHC logic operating from 2 V to 5.5 V supply, 8-bit parallel data latching, and active-low output enable. Designed for data bus driving, address latching, and microcontroller I/O expansion in consumer and industrial electronics.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 20
- Lifecycle
- OBSOLETE
- Datasheet
- SN74AHC373DWG4 Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of SN74AHC373DWG4?
- 8-bit octal D-type transparent latch with 3-state outputs for bus isolation
- Wide supply range 2 V to 5.5 V compatible with 3.3 V and 5 V logic systems
- AHC family offers low power and high-speed operation up to 170 MHz typical
- Active-low output enable (OE) for direct bus-driving control
- 20-SOIC (DWG4) package optimized for auto-insertion on standard PCB assembly lines
What is SN74AHC373DWG4 used for?
The SN74AHC373DWG4 is widely used in microprocessor and microcontroller systems for address latching and data bus demultiplexing, ensuring stable 8-bit data transfers at speeds up to 170 MHz. It fits naturally in FPGA and CPLD I/O expansion circuits where 3-state output control is needed to share a common bus among multiple devices. Industrial control boards and consumer electronics also use this latch to buffer and hold parallel data between fast CPU cycles and slower peripheral devices.
What are the specifications of SN74AHC373DWG4?
| YTEOL | 0 |
| Control Type | ENABLE LOW |
| Count Direction | UNIDIRECTIONAL |
| Family | AHC/VHC/H/U/V |
| JESD-30 Code | R-PDSO-G20 |
| JESD-609 Code | e4 |
| Load Capacitance (CL) | 50pF |
| Logic IC Type | BUS DRIVER |
| Max I(ol) | 0.008A |
| Number of Bits | 8 |
| Number of Functions | 1 |
| Number of Ports | 2 |
| Output Characteristics | 3-STATE |
| Output Polarity | TRUE |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SOP20,.4 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE |
| Packing Method | TUBE |
| Peak Reflow Temperature (Cel) | 260 |
| Power Supply Current-Max (ICC) | 0.04mA |
| Prop. Delay@Nom-Sup | 10.5ns |
| Propagation Delay (tpd) | 16.5ns |
| Qualification Status | Not Qualified |
| Supply Voltage-Max (Vsup) | 5.5V |
| Supply Voltage-Min (Vsup) | 2V |
| Supply Voltage-Nom (Vsup) | 3.3V |
| Surface Mount | YES |
| Technology | CMOS |
| Temperature Grade | INDUSTRIAL |
| 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 |
Where can I find the SN74AHC373DWG4 datasheet?
SN74AHC373DWG4 Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for SN74AHC373DWG4?
Compatible alternatives and drop-in replacements for SN74AHC373DWG4:
Bus Driver, AHC/VHC/H/U/V Series, 8-Func, 8-Bit, True Output, CMOS, PDSO20
Bus Driver, AHC/VHC/H/U/V Series, 1-Func, 8-Bit, True Output, CMOS, PDSO20
Frequently Asked Questions
At what supply voltage and propagation delay does the SN74AHC373DWG4 operate for high-speed bus applications?
The SN74AHC373DWG4 operates from a 2 V to 5.5 V supply voltage. At 3.3 V, typical propagation delay (tpd) is around 5.5 ns with a 50 pF load capacitance, enabling high-speed address latching at frequencies up to 170 MHz. This makes it well-suited for fast data bus and address demultiplexing in embedded processor designs.
How do the 3-state outputs of this latch help in shared-bus microcontroller designs?
The 3-state outputs allow the SN74AHC373DWG4 to disconnect all 8 output pins from the bus when the active-low output enable (OE) is deasserted, presenting a high-impedance state. This enables multiple bus drivers to share a single 8-bit data bus without signal conflicts. Each output can sink 8 mA and source 8 mA, supporting up to 50 pF load capacitance in typical SOIC-20 board designs.
For procurement, how does the SN74AHC373DWG4 compare in package footprint to the TSSOP-20 variant?
The SN74AHC373DWG4 uses a 20-pin SOIC package (DW suffix) with a body width of approximately 7.5 mm and 1.27 mm pin pitch, making it larger than the TSSOP-20 variant at 4.4 mm body width and 0.65 mm pitch. For space-constrained PCBs, the TSSOP-20 (PW suffix) saves about 40% board area, while the SOIC-20 is preferred for easier hand-soldering and rework in prototyping environments.
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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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