Overview
The 74HCT4851PW/S400118 is an 8-channel analog multiplexer/demultiplexer produced by NXP USA Inc. This high-speed Si-gate CMOS device is specified in compliance with JEDEC standard no. 7A. It features three digital select inputs (S0 to S2), an active-LOW enable input (E), eight independent inputs/outputs (Y0 to Y7), and a common input/output (Z). The device is particularly valuable in automotive applications due to its injection-current effect control, which allows signals at disabled analog input channels to exceed the supply voltage without affecting the signal of the enabled analog channel.
Key Specifications
| Parameter | Value |
|---|---|
| Type Number | 74HCT4851PW |
| Configuration | SP8T-Z |
| VCC (V) | 4.5 - 5.5 |
| Logic Switching Levels | TTL |
| On-State Resistance (RON) | 59 Ω (typical) at VCC = 6.0 V |
| Injection-Current Cross Coupling | < 1 mV/mA |
| Latch-Up Performance | Exceeds 100 mA per JESD 78 Class II level A |
| ESD Protection | Available |
| Operating Temperature (Tamb) | -40°C to 125°C |
| Package | TSSOP16 (SOT403-1) |
Key Features
- High-speed Si-gate CMOS technology
- Injection-current effect control to handle voltages exceeding the supply voltage
- Low ON-state resistance: 59 Ω (typical) at VCC = 6.0 V
- Wide supply voltage range: 2.0 V to 6.0 V
- Active-LOW enable input (E) and three digital select inputs (S0 to S2)
- Eight independent inputs/outputs (Y0 to Y7) and a common input/output (Z)
- ESD protection and latch-up performance exceeding 100 mA per JESD 78 Class II level A
Applications
- Automotive applications where voltages in excess of the supply voltage are common
- Analog signal switching and routing in various electronic systems
- Industrial control systems requiring high reliability and low ON-state resistance
- Communication equipment and data acquisition systems
Q & A
- What is the primary function of the 74HCT4851PW?
The primary function of the 74HCT4851PW is to act as an 8-channel analog multiplexer/demultiplexer.
- What is the significance of injection-current effect control in this device?
The injection-current effect control allows signals at disabled analog input channels to exceed the supply voltage without affecting the signal of the enabled analog channel, eliminating the need for external diode/resistor networks.
- What is the typical ON-state resistance of the 74HCT4851PW at VCC = 6.0 V?
The typical ON-state resistance is 59 Ω at VCC = 6.0 V.
- What is the operating temperature range of the 74HCT4851PW?
The operating temperature range is -40°C to 125°C.
- What type of logic switching levels does the 74HCT4851PW support?
The device supports TTL (Transistor-Transistor Logic) switching levels.
- What is the package type of the 74HCT4851PW?
The package type is TSSOP16 (SOT403-1).
- Does the 74HCT4851PW have ESD protection?
- What is the latch-up performance of the 74HCT4851PW?
The latch-up performance exceeds 100 mA per JESD 78 Class II level A.
- In which applications is the 74HCT4851PW particularly useful?
The device is particularly useful in automotive applications and other systems where voltages in excess of the supply voltage are common.
- How many digital select inputs does the 74HCT4851PW have?
The device has three digital select inputs (S0 to S2).
