Overview
The SN74LV161APWR is a 4-bit synchronous binary counter designed and manufactured by Texas Instruments. These counters are optimized for operation within a voltage range of 2 V to 5.5 V, making them versatile for various applications. They feature synchronous counting and presetting capabilities, which are essential for high-speed counting designs. The internal carry look-ahead circuitry allows for fast counting and enables cascading counters for n-bit synchronous applications without additional gating.
Key Specifications
| Parameter | Value | Conditions |
|---|---|---|
| VCC Supply Voltage | 2 V to 5.5 V | |
| Operating Temperature Range | -40°C to 85°C | |
| Maximum Propagation Delay (tpd) | 9.5 ns at 5 V | |
| Typical Output Ground Bounce (VOLP) | < 0.8 V at VCC = 3.3 V, TA = 25°C | |
| Typical Output VOH Undershoot (VOHV) | > 2.3 V at VCC = 3.3 V, TA = 25°C | |
| Package Type | TSSOP (PW) - 16 pins | |
| 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
- Internal carry look-ahead for fast counting
- Carry output for n-bit cascading
- Synchronous counting and presetting
- Supports mixed-mode voltage operation on all ports
- Partial-power-down mode operation using Ioff
- Latch-up performance exceeds 100 mA per JESD 78, Class II
- ESD protection exceeds JESD 22 standards
- Asynchronous clear function
- Fully independent clock circuit
Applications
The SN74LV161APWR is suitable for a variety of high-speed counting applications, including:
- High-speed digital counters in industrial control systems
- Cascaded counter applications for n-bit synchronous counting
- Partial-power-down mode applications to conserve power
- Mixed-mode voltage operation environments
- Systems requiring synchronous presetting and counting
Q & A
- What is the operating voltage range of the SN74LV161APWR?
The SN74LV161APWR operates within a voltage range of 2 V to 5.5 V.
- What is the maximum propagation delay of the SN74LV161APWR at 5 V?
The maximum propagation delay is 9.5 ns at 5 V.
- Does the SN74LV161APWR support partial-power-down mode operation?
Yes, it supports partial-power-down mode operation using Ioff.
- What type of clear function does the SN74LV161APWR have?
The clear function is asynchronous.
- Can the SN74LV161APWR be cascaded for n-bit synchronous applications?
Yes, it can be cascaded using the carry look-ahead circuitry and ripple-carry output (RCO).
- What is the typical output ground bounce (VOLP) at VCC = 3.3 V and TA = 25°C?
The typical output ground bounce (VOLP) is less than 0.8 V.
- What is the latch-up performance of the SN74LV161APWR according to JESD 78, Class II?
The latch-up performance exceeds 100 mA.
- What type of ESD protection does the SN74LV161APWR have?
The device has ESD protection exceeding JESD 22 standards, including 2000-V Human-Body Model, 200-V Machine Model, and 1000-V Charged-Device Model.
- What is the package type and pin count of the SN74LV161APWR?
The package type is TSSOP (PW) with 16 pins.
- What is the operating temperature range of the SN74LV161APWR?
The operating temperature range is -40°C to 85°C.
