Overview
The SN74LV8151PW is a 10-bit universal Schmitt-trigger buffer with 3-state outputs, designed and manufactured by Texas Instruments. This device is optimized for operation over a wide voltage range of 2-V to 5.5-V VCC. It features a logic control pin (T/C) that allows users to configure the Y outputs as either noninverting or inverting, providing flexibility in logic operations. The device includes output-enable (OE) input, which when low, allows data to pass from Dn to Yn, and when high, places the Y outputs in a high-impedance state. The SN74LV8151PW is fully specified for partial-power-down applications using Ioff circuitry, preventing damaging current backflow when powered down.
Key Specifications
| Parameter | Value |
|---|---|
| Package Type | TSSOP (PW) |
| Pins | 24 |
| Operating Temperature Range (°C) | -40 to 85 |
| VCC Operation Range | 2-V to 5.5-V |
| Maximum Propagation Delay (tpd) at 5 V | 15 ns |
| Typical VOLP (Output Ground Bounce) at VCC = 3.3 V, TA = 25°C | < 0.8 V |
| Typical VOHV (Output VOH Undershoot) at VCC = 3.3 V, TA = 25°C | > 2.3 V |
| ESD Protection | 2000-V Human-Body Model, 200-V Machine Model, 1000-V Charged-Device Model |
Key Features
- 2-V to 5.5-V VCC operation
- Schmitt-trigger inputs allow for slow input rise/fall time
- Polarity control for Y outputs selects true or complementary logic
- Supports partial-power-down mode operation using Ioff
- Supports mixed-mode voltage operation on all ports
- Latch-up performance exceeds 250 mA per JESD 17
- ESD protection exceeds JESD 22 standards
Applications
The SN74LV8151PW is suitable for a variety of applications that require buffer functions with flexible logic control and robust ESD protection. These include:
- General-purpose buffering in digital circuits
- Mixed-voltage systems where compatibility with different voltage levels is necessary
- Partial-power-down applications to conserve power and prevent current backflow
- Systems requiring high ESD protection and latch-up performance
Q & A
- What is the operating voltage range of the SN74LV8151PW?
The SN74LV8151PW operates over a voltage range of 2-V to 5.5-V VCC.
- How can the polarity of the Y outputs be controlled?
The polarity of the Y outputs can be controlled using the logic control pin (T/C). When T/C is high, the Y outputs are noninverted, and when T/C is low, the Y outputs are inverted.
- What is the maximum propagation delay at 5 V?
The maximum propagation delay (tpd) at 5 V is 15 ns.
- Does the SN74LV8151PW support partial-power-down mode?
- What kind of ESD protection does the SN74LV8151PW offer?
The SN74LV8151PW offers ESD protection exceeding 2000-V Human-Body Model, 200-V Machine Model, and 1000-V Charged-Device Model.
- How do you ensure the high-impedance state during power up or power down?
To ensure the high-impedance state during power up or power down, the OE input should be tied to VCC through a pullup resistor.
- What is the significance of Schmitt-trigger inputs in the SN74LV8151PW?
Schmitt-trigger inputs allow for slow input rise/fall time, improving noise immunity and stability in the circuit.
- Is the SN74LV8151PW still in production?
No, the SN74LV8151PW is obsolete and no longer in production. New designs should consider an alternate product.
- What is the operating temperature range of the SN74LV8151PW?
The operating temperature range is -40°C to 85°C.
- What package types are available for the SN74LV8151?
The SN74LV8151 is available in TSSOP (PW), PDIP (NT), and other package types.
