CD4043BDG4 Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
The CD4043BDG4 is a quad 3-state R-S latch from Texas Instruments in the CMOS 4000 logic family with four independent SR-type latches sharing a common 3-state output enable. It comes in a 16-pin SOIC package and operates across a wide supply range for bus interfacing. Available from stock with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 16
- Lifecycle
- OBSOLETE
- Datasheet
- CD4043BDG4 Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- -55.0°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of CD4043BDG4?
- 4-channel SR-type latch with independent Set and Reset inputs
- 3-state outputs for direct bus connection and multiplexed data lines
- CMOS 4000 family operating from 3 V to 18 V supply voltage
- 16-pin SOIC package with 50 pF rated load capacitance
- 4.2 mA output sink current for driving TTL-compatible loads
- Common Output Enable pin controls all 4 outputs simultaneously
What is CD4043BDG4 used for?
The CD4043BDG4 is used in bus-oriented data storage, keyboard encoders, and multiplexed display systems requiring four independently settable latches with 3-state bus capability. Its wide 3 V to 18 V CMOS supply range makes it compatible with both legacy 12 V industrial logic and modern 3.3 V microcontroller systems. The common output-enable pin simplifies bus arbitration in multi-master systems, reducing external glue logic requirements.
What are the specifications of CD4043BDG4?
| YTEOL | 0 |
| Family | 4000/14000/40000 |
| JESD-30 Code | R-PDSO-G16 |
| JESD-609 Code | e4 |
| Load Capacitance (CL) | 50pF |
| Logic IC Type | R-S LATCH |
| Max I(ol) | 0.004200000000000001A |
| Number of Bits | 4 |
| Number of Functions | 1 |
| Output Characteristics | 3-STATE |
| Output Polarity | TRUE |
| 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) | 0.6mA |
| Prop. Delay@Nom-Sup | 300ns |
| Propagation Delay (tpd) | 300ns |
| Qualification Status | Not Qualified |
| Supply Voltage-Max (Vsup) | 18V |
| Supply Voltage-Min (Vsup) | 3V |
| Supply Voltage-Nom (Vsup) | 5V |
| Surface Mount | YES |
| Technology | CMOS |
| Temperature Grade | MILITARY |
| 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 CD4043BDG4 datasheet?
CD4043BDG4 Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for CD4043BDG4?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What supply voltage range does the CD4043BDG4 support and how does it interface with 3.3 V microcontrollers?
The CD4043BDG4 operates from 3 V to 18 V supply voltage as part of the CMOS 4000 logic family. When powered at 3.3 V, its output voltage levels are fully compatible with 3.3 V microcontroller I/O pins, enabling direct connection without level-shifting. At 5 V the outputs meet TTL input thresholds, accommodating mixed 3.3 V and 5 V board designs.
How does the 3-state output enable of the CD4043BDG4 work in a shared-bus architecture with multiple drivers?
The CD4043BDG4 has a single Output Enable (OE) pin that simultaneously places all 4 latch outputs into a high-impedance 3-state condition when deasserted. This allows multiple CD4043 devices to connect their outputs to a common 4-bit bus, with only one device active at a time. Each device can sink up to 4.2 mA when enabled, and the 50 pF load capacitance rating supports standard PCB trace lengths.
How do the SR latch inputs of the CD4043BDG4 differ from a D-type latch and when is the SR topology preferable?
Each latch in the CD4043BDG4 uses independent Set (S) and Reset (R) inputs rather than a single D input and clock, allowing asynchronous one-wire assertion to latch a state without a clock edge. This SR topology is preferable in keyboard matrix decoders, alarm latch circuits, and event-capture systems where the input signal itself acts as both the data and the clock, reducing 2-wire overhead and enabling 4.2 mA latched outputs for direct LED status indicators.
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
“We've been using FindMyChip for 2 years. Pricing is consistently 20-30% below Mouser/DigiKey for volume orders.”
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