Specifications
| Type | Description |
|---|---|
| Part Number | CD4049UB |
| Manufacturer | Texas Instruments |
| Product Type | Operational Amplifier |
| Category | Signal Chain |
| Package / Case | 16-pin PDIP N/E 6.35mm x 19.30mm; SOIC D 9.90mm x 3.91mm; SOIC DW 10.30mm x 7.50mm; SO NS 10.30mm x 5.30mm; TSSOP PW 5.00mm x 4.40mm |
| Component Type | Other |
| Logic Function, CD4049UB | Hex inverting buffer |
| Logic Function, CD4050B | Hex noninverting buffer |
| Logic-Level Conversion | Input high level can exceed VCC; used for logic-level conversion with one supply voltage |
| TTL/DTL Drive Capability | Can drive two DTL or TTL loads at VCC=5V, VOL<=0.4V, IOL>=3.3mA |
| Supply Voltage | 3 to 18 V recommended operating condition |
| Operating Free-Air Temperature | -55 to 125 °C recommended operating condition |
| Absolute Maximum Supply Voltage | -0.5 to 20 V, VCC to VSS |
| Absolute Maximum DC Input Current | ±10 mA, any one input |
| Lead Temperature | 265 °C, SOIC lead tips only, soldering 10s |
| Junction Temperature | 150 °C absolute maximum rating |
| Storage Temperature | -65 to 150 °C absolute maximum rating |
| ESD HBM | ±1500 V, ANSI/ESDA/JEDEC JS-001 |
| ESD CDM | ±1000 V, JEDEC JESD22C101 |
| Output Low Sink Current, 4.5V | min 2.6 mA, typ 5.2 mA; VOUT=0.4V, VIN=0 or 5V, VCC=4.5V, TA=25°C |
| Output Low Sink Current, 5V | min 3.2 mA, typ 6.4 mA; VOUT=0.4V, VIN=0 or 5V, VCC=5V, TA=25°C |
| Output Low Sink Current, 10V | min 8 mA, typ 16 mA; VOUT=0.5V, VIN=0 or 10V, VCC=10V, TA=25°C |
| Output Low Sink Current, 15V | min 24 mA, typ 48 mA; VOUT=1.5V, VIN=0 or 15V, VCC=15V, TA=25°C |
| Output High Source Current, 5V at 4.6V | min -0.65 mA, typ -1.2 mA; VOUT=4.6V, VIN=0 or 5V, VCC=5V, TA=25°C |
| Output High Source Current, 5V at 2.5V | min -2.1 mA, typ -3.9 mA; VOUT=2.5V, VIN=0 or 5V, VCC=5V, TA=25°C |
| Output High Source Current, 10V | min -1.65 mA, typ -3 mA; VOUT=9.5V, VIN=0 or 10V, VCC=10V, TA=25°C |
| Output High Source Current, 15V | min -4.3 mA, typ -8 mA; VOUT=1.3V, VIN=0 or 15V, VCC=15V, TA=25°C |
| Input Low Voltage, CD4049UB 5V | max 1 V; VOUT=4.5V, VCC=5V, full temperature range |
| Input Low Voltage, CD4049UB 10V | max 2 V; VOUT=9V, VCC=10V, full temperature range |
| Input Low Voltage, CD4049UB 15V | max 2.5 V; VOUT=13.5V, VCC=15V, full temperature range |
| Input Low Voltage, CD4050B 5V | max 1.5 V; VOUT=0.5V, VCC=5V, full temperature range |
| Input Low Voltage, CD4050B 10V | max 3 V; VOUT=1V, VCC=10V, full temperature range |
| Input Low Voltage, CD4050B 15V | max 4 V; VOUT=1.5V, VCC=15V, full temperature range |
| Input High Voltage, CD4049UB 5V | min 4 V; VOUT=0.5V, VCC=5V, full temperature range |
| Input High Voltage, CD4049UB 10V | min 8 V; VOUT=1V, VCC=10V, full temperature range |
| Input High Voltage, CD4049UB 15V | min 12.5 V; VOUT=1.5V, VCC=15V, full temperature range |
| Input High Voltage, CD4050B 5V | min 3.5 V; VOUT=4.5V, VCC=5V, full temperature range |
| Input High Voltage, CD4050B 10V | min 7 V; VOUT=9V, VCC=10V, full temperature range |
| Input High Voltage, CD4050B 15V | min 11 V; VOUT=13.5V, VCC=15V, full temperature range |
| Quiescent Device Current, 5V | typ 0.02 µA, max 1 µA; VIN=0 or 5V, VCC=5V, TA=25°C |
| Quiescent Device Current, 10V | typ 0.02 µA, max 2 µA; VIN=0 or 10V, VCC=10V, TA=25°C |
| Quiescent Device Current, 15V | typ 0.02 µA, max 4 µA; VIN=0 or 15V, VCC=15V, TA=25°C |
| Quiescent Device Current, 20V | typ 0.04 µA, max 20 µA; VIN=0 or 20V, VCC=20V, TA=25°C |
| Output Low Voltage, 5V | typ 0 V, max 0.05 V; VIN=0 or 5V, VCC=5V, TA=25°C |
| Output Low Voltage, 10V | typ 0 V, max 0.05 V; VIN=0 or 10V, VCC=10V, TA=25°C |
| Output Low Voltage, 15V | typ 0 V, max 0.05 V; VIN=0 or 15V, VCC=15V, TA=25°C |
| Output High Voltage, 5V | min 4.95 V, typ 5 V; VIN=0 or 5V, VCC=5V, TA=25°C |
| Output High Voltage, 10V | min 9.95 V, typ 10 V; VIN=0 or 10V, VCC=10V, TA=25°C |
| Output High Voltage, 15V | min 14.95 V, typ 15 V; VIN=0 or 15V, VCC=15V, TA=25°C |
| Input Current | typ ±0.00001 µA, max ±0.1 µA; VIN=0 or 18V, VCC=18V, TA=25°C |
| Propagation Delay Low-to-High, CD4049UB 5V | typ 60 ns, max 120 ns; VIN=5V, VCC=5V, TA=25°C, tr=tf=20ns, CL=50pF, RL=200kΩ |
| Propagation Delay Low-to-High, CD4049UB 10V | typ 32 ns, max 65 ns; VIN=10V, VCC=10V, TA=25°C, tr=tf=20ns, CL=50pF, RL=200kΩ |
| Propagation Delay Low-to-High, CD4049UB 10V input, 5V supply | typ 45 ns, max 90 ns; VIN=10V, VCC=5V, TA=25°C, tr=tf=20ns, CL=50pF, RL=200kΩ |
| Propagation Delay Low-to-High, CD4050B 5V | typ 70 ns, max 140 ns; VIN=5V, VCC=5V, TA=25°C, tr=tf=20ns, CL=50pF, RL=200kΩ |
| Propagation Delay High-to-Low, CD4049UB 5V | typ 32 ns, max 65 ns; VIN=5V, VCC=5V, TA=25°C, tr=tf=20ns, CL=50pF, RL=200kΩ |
| Propagation Delay High-to-Low, CD4049UB 10V | typ 20 ns, max 40 ns; VIN=10V, VCC=10V, TA=25°C, tr=tf=20ns, CL=50pF, RL=200kΩ |
| Pin Count | 16 pins for D, DW, N/E, NS, and PW packages |
| Power Pin | VCC on pin 1 for CD4049UB and CD4050B pin configuration |
| Negative Supply Pin | VSS on pin 8 for CD4049UB and CD4050B pin configuration |
| No Connection Pins | Pins 13 and 16 for CD4049UB and CD4050B pin functions |
| Datasheet Status | request_only |
Product Overview
The Texas Instruments CD4049UB is a CMOS hex buffer converter for Signal_Chain designs that require inverted buffering and logic-level conversion. For the CD4049UB condition, the logic function is a hex inverting buffer; the related CD4050B condition is a hex noninverting buffer. The input high level can exceed VCC when used for logic-level conversion with one supply voltage.
Recommended operating supply voltage is 3 to 18 V, with an operating free-air temperature range of -55 to 125 °C. Absolute maximum ratings include -0.5 to 20 V from VCC to VSS, ±10 mA maximum DC input current for any one input, 150 °C junction temperature, and -65 to 150 °C storage temperature. ESD ratings are ±1500 V HBM and ±1000 V CDM.
Package options are 16-pin PDIP N/E, SOIC D, SOIC DW, SO NS, and TSSOP PW. The pin configuration places VCC on pin 1 and VSS on pin 8, with pins 13 and 16 marked as no connection. Assembly data includes 265 °C lead-tip temperature for SOIC soldering over 10 seconds.
Key Features
- Hex inverting buffer logic function for CD4049UB
- Input high level can exceed VCC for conversion
- Recommended 3 to 18 V supply range
- -55 to 125 °C operating free-air temperature
- Drives two DTL or TTL loads at 5 V
- Sixteen-pin PDIP, SOIC, SO, and TSSOP packages
- VCC on pin 1 and VSS on pin 8
- Pins 13 and 16 are no connection pins
- HBM ESD rating is ±1500 V
- CDM ESD rating is ±1000 V
Typical Applications
- Logic-level conversion with one supply
- Hex inverting signal buffering
- TTL or DTL load drive
- CMOS signal-chain interfacing
- Wide-temperature logic circuits
- 16-pin PDIP or SOIC designs
- TSSOP logic board layouts
Procurement Notes
When requesting a quote for CD4049UB, buyers should confirm the manufacturer, package or case, required quantity, target date code, compliance documents, packing method, destination country and expected delivery schedule.
If alternatives are acceptable, buyers should share the approved vendor list, required electrical or optical limits, package constraints and qualification requirements. Any alternative part should be reviewed by the buyer's engineering team before production use.
For analog and signal-chain sourcing, supply voltage, bandwidth, accuracy, noise level, package, temperature grade, input/output configuration and qualification requirements should be verified before approval.
FAQ
What logic function does the CD4049UB provide?
The CD4049UB provides a hex inverting buffer logic function. The extracted datasheet facts also identify the related CD4050B condition as a hex noninverting buffer, but the specified part number CD4049UB is the inverting version.
What supply voltage range is recommended for CD4049UB operation?
The recommended operating supply voltage range is 3 to 18 V. The absolute maximum supply voltage rating is -0.5 to 20 V from VCC to VSS, which is a stress rating rather than the normal operating range.
Can the CD4049UB be used for logic-level conversion?
Yes. The extracted facts state that the input high level can exceed VCC when the device is used for logic-level conversion with one supply voltage. This supports level conversion applications without adding a second supply.
What packages and pins are specified for the CD4049UB?
The device is specified in 16-pin PDIP N/E, SOIC D, SOIC DW, SO NS, and TSSOP PW packages. VCC is on pin 1, VSS is on pin 8, and pins 13 and 16 are no connection pins.
Technical Review & Sourcing Note
Prepared by LDeepAI Component Sourcing Team. Reviewed for RFQ, documentation and alternative sourcing use. Last updated: June 30, 2026.
This page is based on manufacturer datasheet information and LDeepAI sourcing review. Specifications should be verified against the official manufacturer datasheet before final procurement or design approval. Final electrical, optical and reliability approval should be confirmed by the buyer's engineering team.