CD74HC541PWRE4 Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
CD74HC541PWRE4 is a high-speed CMOS octal buffer and line driver with 3-state outputs and dual active-low output-enable from Texas Instruments, rated for 2 V to 6 V operation. From $0.30 in stock worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 20
- Lifecycle
- OBSOLETE
- Datasheet
- CD74HC541PWRE4 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
- 8-channel unidirectional buffer with 3-state outputs for bus sharing
- Dual active-low output-enable pins for flexible bus control
- High-speed HC CMOS family with propagation delay under 10 ns at 5 V
- Drive capability up to 6 mA output sink current per channel
- 50 pF load capacitance rating for driving PCB trace loads
- TSSOP-20 package for compact board layouts
Applications
CD74HC541PWRE4 is used to buffer and isolate data buses in microcontroller, FPGA, and memory interface designs where multiple devices share a common address or data bus. Its 3-state outputs allow bus arbitration between several bus masters in backplane or card-edge systems. The dual output-enable inputs also make it suitable for memory bank selection and I/O port expansion in embedded hardware designs.
Specifications
| YTEOL | 0 |
| Additional Feature | WITH DUAL OUTPUT ENABLE |
| Control Type | ENABLE LOW |
| Count Direction | UNIDIRECTIONAL |
| Family | HC/UH |
| JESD-30 Code | R-PDSO-G20 |
| JESD-609 Code | e4 |
| Load Capacitance (CL) | 50pF |
| Logic IC Type | BUS DRIVER |
| Max I(ol) | 0.006A |
| 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 | TSSOP20,.25 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE, THIN PROFILE, SHRINK PITCH |
| Packing Method | TR |
| Peak Reflow Temperature (Cel) | 260 |
| Power Supply Current-Max (ICC) | 0.16mA |
| Prop. Delay@Nom-Sup | 35ns |
| Propagation Delay (tpd) | 175ns |
| Qualification Status | Not Qualified |
| Supply Voltage-Max (Vsup) | 6V |
| 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 | 0.65mm |
| 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 |
| HTS Code | 8542.39.00.60 |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
How many output channels does the CD74HC541PWRE4 provide, and what output current can each channel source or sink?
The CD74HC541PWRE4 provides 8 buffered output channels. Each output can sink up to 6 mA, which is sufficient to drive standard TTL and CMOS logic inputs and short PCB traces with up to 50 pF capacitive loading. The 3-state outputs allow all 8 channels to be disabled simultaneously, placing them in a high-impedance state for bus sharing.
Over what supply voltage range does the CD74HC541PWRE4 operate, and how does it interface with both 3.3 V and 5 V logic families?
The device supports a supply voltage range of 2 V to 6 V, covering both 3.3 V and 5 V system rails. When powered at 3.3 V it accepts 5 V-tolerant TTL input levels, though output swing is limited to 3.3 V; for full 5 V output swing the VCC pin must be connected to the 5 V rail. This flexibility allows direct connection to HC, HCT, and TTL logic without additional voltage translation.
In a memory expansion design, how do the two output-enable pins of CD74HC541PWRE4 simplify bank-select logic?
The CD74HC541PWRE4 has two separate active-low output-enable inputs (OE1 and OE2) that must both be asserted to enable the 8 outputs. A designer can connect one OE pin to a chip-select decoder and the other to a global bus-enable signal, implementing a 2-input AND gate for bank selection without extra logic gates. When either OE is de-asserted, all 8 outputs enter the high-impedance 3-state condition, isolating that memory bank from the shared bus.
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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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