Overview
The HEF4040BT, produced by NXP USA Inc., is a 12-stage binary ripple counter. This integrated circuit features a clock input (CP) and an overriding asynchronous master reset input (MR), along with twelve fully buffered outputs (Q0 to Q11). The counter advances on the HIGH-to-LOW transition of the clock input. A HIGH signal on the master reset input clears all counter stages and forces all outputs to LOW, independent of the clock input. Each counter stage is a static toggle flip-flop, and the inputs are overvoltage tolerant up to 15 V, enabling the device to be used in HIGH-to-LOW level shifting applications.
Key Specifications
| Type number | VCC (V) | Output drive capability (mA) | Logic switching levels | tpd (ns) | Power dissipation considerations | Tamb (°C) | Rth(j-a) (K/W) | Ψth(j-top) (K/W) | Rth(j-c) (K/W) | Package name |
|---|---|---|---|---|---|---|---|---|---|---|
| HEF4040BT | 3.0 - 15 | ± 2.4 | CMOS | 35 | medium | -40 ~ 85 | 78 | 3.5 | 36.9 | SO16 |
Key Features
- Wide supply voltage range from 3.0 V to 15.0 V
- CMOS low power dissipation
- High noise immunity
- Tolerant of slow clock rise and fall times
- Fully static operation
- Standardized symmetrical output characteristics
- Complies with JEDEC standard JESD 13-B
- ESD protection: HBM (ANSI/ESDA/JEDEC JS-001 class 2) exceeds 2000 V, CDM (ANSI/ESDA/JEDEC JS-002 class C3) exceeds 1000 V
Applications
- Frequency dividing circuits
- Time delay circuits
- Control counters
Q & A
- What is the HEF4040BT?
The HEF4040BT is a 12-stage binary ripple counter with a clock input and an asynchronous master reset input.
- What is the supply voltage range of the HEF4040BT?
The supply voltage range is from 3.0 V to 15.0 V.
- How does the counter advance?
The counter advances on the HIGH-to-LOW transition of the clock input (CP).
- What is the effect of the master reset input (MR)?
A HIGH signal on the master reset input clears all counter stages and forces all outputs to LOW, independent of the clock input.
- What is the output drive capability of the HEF4040BT?
The output drive capability is ± 2.4 mA.
- What are the ESD protection ratings for the HEF4040BT?
ESD protection: HBM (ANSI/ESDA/JEDEC JS-001 class 2) exceeds 2000 V, CDM (ANSI/ESDA/JEDEC JS-002 class C3) exceeds 1000 V.
- What is the operating temperature range for the HEF4040BT?
The operating temperature range is from -40 °C to +85 °C.
- What type of logic switching levels does the HEF4040BT use?
The HEF4040BT uses CMOS logic switching levels.
- What are some common applications of the HEF4040BT?
Common applications include frequency dividing circuits, time delay circuits, and control counters.
- What package type is the HEF4040BT available in?
The HEF4040BT is available in an SO16 (SOT109-1) package.
