TLC556MDRG4 Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
TLC556MDRG4 is a dual LinCMOS low-power timer IC with two independent timing channels. It operates up to 1.2 MHz output frequency and supports 15 V nominal supply for versatile pulse generation. Housed in a 14-pin SOP package for space-efficient PCB assembly.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 14
- Lifecycle
- OBSOLETE
- Datasheet
- TLC556MDRG4 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
Key Features
- Dual independent LinCMOS timer channels supporting monostable and astable operation up to 1.2 MHz
- Wide supply voltage range including 15 V nominal operation for industrial and automotive timing applications
- Low quiescent current LinCMOS process reduces power dissipation compared to bipolar 555 timer alternatives
Applications
The TLC556MDRG4 is used in pulse generation, frequency division, and sequential timing circuits in industrial control and consumer electronics. Its dual-channel architecture allows two independent monostable or astable timers in a single 14-pin SOP package, saving PCB area in designs requiring multiple timing signals. The LinCMOS process makes it suitable for battery-powered sensor interfaces and low-frequency oscillator applications operating at supply voltages up to 15 V.
Specifications
| Pbfree Code | Yes |
| YTEOL | 0 |
| Additional Feature | IT CAN ALSO OPERATE AT 15V NOMINAL |
| Analog IC - Other Type | PULSE; RECTANGULAR |
| JESD-30 Code | R-PDSO-G14 |
| JESD-609 Code | e4 |
| Number of Functions | 2 |
| Output Frequency-Max | 1.2MHz |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SOP14,.25 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE |
| Peak Reflow Temperature (Cel) | 260 |
| Qualification Status | Not Qualified |
| Supply Current-Max (Isup) | 1.4mA |
| Supply Voltage-Max (Vsup) | 15V |
| Supply Voltage-Min (Vsup) | 2V |
| 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 |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.01 |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for TLC556MDRG4:
Frequently Asked Questions
What is the maximum output frequency of the TLC556MDRG4 and how does it compare to the original bipolar 555 timer?
The TLC556MDRG4 reaches a maximum output frequency of 1.2 MHz in astable mode, which is comparable to the NE555 bipolar equivalent. However, the LinCMOS process draws significantly less quiescent current—typically under 1 mA at 5 V—versus several milliamps for the bipolar NE556, making TLC556MDRG4 a preferred choice in battery-powered timing designs.
Can the TLC556MDRG4 operate at 15 V and what does this mean for industrial sensor timing applications?
Yes, the TLC556MDRG4 supports up to 15 V nominal supply, allowing direct connection to 12 V or 15 V industrial control rails without a separate low-voltage regulator. This capability is useful in PLC input conditioning circuits, where timing pulse widths from 1 µs to several seconds can be set with a single resistor-capacitor network.
How do the two independent timer channels of the TLC556MDRG4 simplify dual-channel pulse generation designs?
Each of the 2 timer channels in the TLC556MDRG4 has its own threshold, trigger, and output pins, enabling independent time constants in a single 14-pin SOP-14 package. This eliminates the need for two separate single-timer ICs, reducing part count by 1 and saving approximately 30 mm² of PCB area in compact timer circuits requiring two separate timing intervals.
What RC values produce a 10 kHz astable output with TLC556MDRG4 and how stable is the frequency over temperature?
To generate 10 kHz in astable mode, a 10 kΩ resistor and a 4.7 nF capacitor combination yields a period close to 100 µs with the standard 555-type timing formula. The TLC556MDRG4 LinCMOS comparators exhibit a temperature coefficient below 100 ppm/°C, so frequency drift stays within ±1% across the military temperature range of -55°C to +125°C for precision timing tasks.
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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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