Overview
The Texas Instruments SN74LV161APWRE4 is a 4-bit synchronous binary counter designed for operation within a voltage range of 2-V to 5.5-V. This device features internal carry look-ahead for high-speed counting applications and supports synchronous counting, making it ideal for eliminating output counting spikes associated with ripple-clock counters. The counter is fully programmable, allowing it to be preset to any number between 0 and 15. It also includes a buffered clock input that triggers the four flip-flops on the rising edge of the clock waveform. The clear function is asynchronous, and the device supports partial-power-down mode operation using Ioff circuitry.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage Range (VCC) | 2 to 5.5 | V |
| Operating Temperature Range | -40 to 85 | °C |
| Maximum Propagation Delay (tpd) at 5 V | 9.5 | ns |
| Typical Output Ground Bounce (VOLP) at VCC = 3.3 V, TA = 25°C | < 0.8 | V |
| Typical Output VOH Undershoot (VOHV) at VCC = 3.3 V, TA = 25°C | > 2.3 | V |
| Package Type | TSSOP-16 | |
| Pins | 16 | |
| 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 programmable
- Supports mixed-mode voltage operation on all ports
- Ioff supports partial-power-down mode operation
- Latch-up performance exceeds 100 mA per JESD 78, Class II
- ESD protection exceeds JESD 22 standards
Applications
The SN74LV161APWRE4 is suitable for a variety of high-speed counting applications, including:
- High-speed digital counters
- Cascaded counter systems
- Timing and clocking circuits
- Programmable logic circuits
- Partial-power-down systems requiring low power consumption
Q & A
- What is the voltage range for the SN74LV161APWRE4?
The SN74LV161APWRE4 operates within a voltage range of 2-V to 5.5-V.
- What is the maximum propagation delay at 5 V?
The maximum propagation delay at 5 V is 9.5 ns.
- What type of counting does the SN74LV161APWRE4 support?
The SN74LV161APWRE4 supports synchronous counting.
- Can the SN74LV161APWRE4 be preset to any number?
Yes, the SN74LV161APWRE4 can be preset to any number between 0 and 15.
- What is the clear function of the SN74LV161APWRE4?
The clear function is asynchronous, setting all four flip-flop outputs low regardless of other input levels.
- Does the SN74LV161APWRE4 support partial-power-down mode?
Yes, it supports partial-power-down mode operation using Ioff circuitry.
- What is the package type of the SN74LV161APWRE4?
The package type is TSSOP-16.
- What are the ESD protection levels for the SN74LV161APWRE4?
The device has ESD protection exceeding 2000-V Human-Body Model, 200-V Machine Model, and 1000-V Charged-Device Model.
- What is the operating temperature range for the SN74LV161APWRE4?
The operating temperature range is -40°C to 85°C.
- Can the SN74LV161APWRE4 be used in cascaded counter systems?
Yes, it supports n-bit cascading with a carry output.
