Overview
The SN74LV273ANSR, produced by Texas Instruments, is an octal D-type flip-flop designed for operation over a wide voltage range of 2-V to 5.5-V VCC. This device is a positive-edge-triggered flip-flop with a direct clear (CLR) input. It is fully specified for partial-power-down applications using Ioff, making it suitable for various power management scenarios. The SN74LV273ANSR is ideal for bus interface type applications where data needs to be retained or latched, and it supports mixed-mode voltage operation on all ports.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| VCC Supply Voltage | 2 | 5.5 | V | |
| VIH High-level Input Voltage | 1.5 (VCC = 2 V) | 0.7 * VCC (VCC = 3 V to 5.5 V) | V | |
| VOH Output High Voltage | VCC - 0.1 | V | ||
| VOL Output Low Voltage | 0.1 | V | ||
| tpd Propagation Delay (CLK to Q) | 4.8 (CL = 15 pF, VCC = 5 V) | 9 (CL = 15 pF, VCC = 5 V) | 10.5 (CL = 15 pF, VCC = 5 V) | ns |
| fmax Maximum Clock Frequency | 120 (CL = 15 pF, VCC = 5 V) | 205 (CL = 15 pF, VCC = 5 V) | 100 (CL = 15 pF, VCC = 5 V) | MHz |
| ESD Rating (HBM) | ±3000 | V | ||
| ESD Rating (CDM) | ±2000 | V |
Key Features
- Operation over a wide voltage range of 2-V to 5.5-V VCC
- Maximum propagation delay (tpd) of 10.5 ns at 5 V
- Typical VOLP (output ground bounce) < 0.8 V at VCC = 3.3 V, TA = 25°C
- Typical VOHV (output VOH undershoot) > 2.3 V at VCC = 3.3 V, TA = 25°C
- Ioff supports partial-power-down mode operation
- Supports mixed-mode voltage operation on all ports
- Latch-up performance exceeds 250 mA per JESD 17
- Low-drive CMOS device to minimize overshoot and undershoot on outputs
- Inputs tolerant to 5.5 V at any valid VCC
Applications
- Power sub-station controls
- I/O modules; analog PLC/DCS inputs
- Human machine interfaces (HMI)
- Flow meters
- Patient monitoring
- Test and measurement solutions
- Bus interface type applications where data needs to be retained or latched
Q & A
- What is the voltage range for VCC operation of the SN74LV273ANSR?
The SN74LV273ANSR operates over a voltage range of 2-V to 5.5-V VCC.
- What is the maximum propagation delay (tpd) at 5 V?
The maximum propagation delay (tpd) at 5 V is 10.5 ns.
- 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 at VCC = 3.3 V and TA = 25°C.
- Does the SN74LV273ANSR support partial-power-down mode operation?
- What is the latch-up performance of the SN74LV273ANSR?
The latch-up performance exceeds 250 mA per JESD 17.
- What are some typical applications of the SN74LV273ANSR?
Typical applications include power sub-station controls, I/O modules, human machine interfaces (HMI), flow meters, patient monitoring, and test and measurement solutions.
- How do I handle unused inputs on the SN74LV273ANSR?
Unused inputs must be terminated to either VCC or ground. They can be directly terminated or connected with a pull-up or pull-down resistor.
- What is the maximum clock frequency for the SN74LV273ANSR?
The maximum clock frequency is 120 MHz at CL = 15 pF and VCC = 5 V.
- What are the ESD ratings for the SN74LV273ANSR?
The ESD ratings are ±3000 V for the human body model (HBM) and ±2000 V for the charged device model (CDM).
- How should I ensure proper power supply for the SN74LV273ANSR?
Ensure the supply voltage is within the specified range, and the positive voltage supply must be capable of sourcing current equal to the total current required by all outputs plus the maximum static supply current.
