CD74HC191MG4 Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
Texas Instruments CD74HC191MG4 is a high-speed CMOS synchronous 4-bit binary up/down counter with preset load and ripple-carry output, operating from 2 V to 6 V. It supports bidirectional counting, synchronous parallel load, and drives 50 pF loads in a 16-pin SOIC package. Available from stock worldwide with fast shipping.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 16
- Lifecycle
- OBSOLETE
- Datasheet
- CD74HC191MG4 Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.9135(MOQ 560)
- 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 CD74HC191MG4?
- Synchronous 4-bit binary up/down counting with single U/D pin for simple direction control
- Synchronous parallel preset load enables instantaneous counter initialization without clock glitches
- Ripple carry output (RCO) enables easy cascading of multiple stages for wider counters without extra logic
- HC/UH family CMOS technology operating from 2 V to 6 V with TTL-compatible inputs
- 16-pin SOIC package (3.9 mm × 9.9 mm) with 50 pF load drive capability for standard PCB designs
What is CD74HC191MG4 used for?
The CD74HC191MG4 is used in frequency dividers, event counters, and address generators in industrial control and test-equipment designs that require a simple, reliable synchronous binary counter. Its bidirectional count capability and parallel load make it well suited for position-tracking encoders, PWM timer stages, and state-machine sequencers. The RCO output allows designers to cascade multiple devices for 8-bit, 12-bit, or wider counter chains without additional glue logic.
What are the specifications of CD74HC191MG4?
| Pbfree Code | Yes |
| YTEOL | 0 |
| Additional Feature | RCO OUTPUT |
| Count Direction | BIDIRECTIONAL |
| Family | HC/UH |
| JESD-30 Code | R-PDSO-G16 |
| JESD-609 Code | e4 |
| Load Capacitance (CL) | 50pF |
| Load/Preset Input | YES |
| Logic IC Type | BINARY COUNTER |
| Max Frequency@Nom-Sup | 20000000Hz |
| Max I(ol) | 0.0052A |
| Mode of Operation | SYNCHRONOUS |
| Number of Bits | 4 |
| Number of Functions | 1 |
| 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) | 0.08mA |
| Prop. Delay@Nom-Sup | 37ns |
| Propagation Delay (tpd) | 255ns |
| Qualification Status | Not Qualified |
| Supply Voltage-Max (Vsup) | 6V |
| Supply Voltage-Min (Vsup) | 2V |
| Supply Voltage-Nom (Vsup) | 4.5V |
| Surface Mount | YES |
| Technology | CMOS |
| Temperature Grade | MILITARY |
| Terminal Finish | Nickel/Palladium/Gold (Ni/Pd/Au) |
| Terminal Form | GULL WING |
| Terminal Pitch | 1.27mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | NOT SPECIFIED |
| Trigger Type | POSITIVE EDGE |
| fmax-Min | 23MHz |
| 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 |
| Country of Origin | Mexico |
Where can I find the CD74HC191MG4 datasheet?
CD74HC191MG4 Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for CD74HC191MG4?
Compatible alternatives and drop-in replacements for CD74HC191MG4:
Counter, HC/UH Series, Synchronous, Positive Edge Triggered, 4-Bit, Bidirectional, CMOS, PDSO16
Binary Counter, HC/UH Series, Synchronous, Positive Edge Triggered, 4-Bit, Bidirectional, CMOS, PDSO16
Binary Counter, HC/UH Series, Synchronous, Positive Edge Triggered, 4-Bit, Bidirectional, CMOS, PDSO16
Frequently Asked Questions
How wide is the CD74HC191MG4 counter and what is the maximum count range it can represent?
The CD74HC191MG4 is a 4-bit synchronous binary counter, so it counts from 0 to 15 (0x0 to 0xF) in either up or down direction. For wider ranges, multiple devices can be cascaded using the Ripple Carry Output (RCO) pin; two devices form an 8-bit counter with a range of 0 to 255, and three form a 12-bit counter reaching 4095.
What supply voltage range does CD74HC191MG4 support, and can it interface directly with 3.3 V logic?
The CD74HC191MG4 operates from 2 V to 6 V, making it compatible with 3.3 V and 5 V logic families. At 3.3 V the device meets standard HC-family input thresholds, so it interfaces directly with 3.3 V microcontrollers and FPGAs without level shifters, simplifying mixed-voltage board designs.
How does the parallel load feature of CD74HC191MG4 work and when is it useful?
Pulling the PL (parallel load) pin low forces the four data inputs (D0–D3) directly into the counter register on the next rising clock edge, regardless of the count direction. This synchronous preset is essential for modulo-N counters—for example, loading count value 6 to build a divide-by-10 counter—and for resynchronizing a counter chain to a known starting state after power-up or a fault event.
What is the RCO (Ripple Carry Output) and how many CD74HC191MG4 devices can be cascaded for a 16-bit counter?
The RCO pin goes active when the counter reaches its terminal count (15 counting up, or 0 counting down) and is enabled by the COUNT ENABLE input. It drives the ENABLE TRICKLE input of the next stage, allowing synchronous cascading with no additional logic gates. Four CD74HC191MG4 devices cascaded via RCO form a 16-bit binary counter with a range of 0 to 65535.
For a compact industrial pulse counter, does the CD74HC191MG4 SOIC package offer an advantage over a DIP alternative?
Yes. The 16-pin SOIC body (3.9 mm × 9.9 mm, 1.27 mm pitch) occupies roughly 75% less PCB area than an equivalent 16-pin DIP (7.62 mm pitch, ~20 mm body length), enabling tighter integration on multi-channel industrial counter boards. The SOIC also offers lower parasitic inductance, which improves signal integrity at the high clock frequencies achievable with the HC family—typically above 25 MHz at 5 V.
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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
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 560+ | $0.9134 | $511.53 |
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