Overview
The SN74HC253DBR is a dual 4-line to 1-line data selector/multiplexer produced by Texas Instruments. This device is part of the 74HC series, known for its high-speed and low-power CMOS logic. It features two independent data selectors/multiplexers with full binary decoding, allowing the selection of one of four data sources. The device includes strobe-controlled 3-state outputs, making it suitable for bus-organized systems.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| VCC Supply Voltage | 2 | 5 | 6 | V |
| VIH High-Level Input Voltage | 1.5 (VCC=2V), 3.15 (VCC=4.5V), 4.2 (VCC=6V) | V | ||
| VIL Low-Level Input Voltage | 0.5 (VCC=2V), 1.35 (VCC=4.5V), 1.8 (VCC=6V) | V | ||
| IOH Output Current (High) | -20 μA, -6 mA, -7.8 mA | A | ||
| IOL Output Current (Low) | 20 μA, 6 mA, 7.8 mA | A | ||
| tpd Propagation Delay | 62 ns (VCC=2V), 19 ns (VCC=4.5V), 16 ns (VCC=6V) | 150 ns (VCC=2V), 30 ns (VCC=4.5V), 26 ns (VCC=6V) | ns | |
| ICC Power Consumption | 8 μA | 80 μA | μA | |
| TJ Junction Temperature | 150 °C | °C |
Key Features
- 3-State version of 'HC153 with strobe-controlled outputs
- Wide operating voltage range of 2 V to 6 V
- High-current inverting outputs drive up to 15 LSTTL loads
- Low power consumption, 80-μA max ICC
- Typical propagation delay (tpd) of 9 ns at VCC = 5 V
- ±6-mA output drive at 5 V
- Low input current of 1 μA max
- Permit multiplexing from n lines to one line and perform parallel-to-serial conversion
Applications
The SN74HC253DBR is suitable for various applications in digital systems, including:
- Bus-organized systems where multiple data lines need to be selected and driven
- Data multiplexing and demultiplexing
- Parallel-to-serial conversion
- High-speed digital logic circuits requiring low power consumption
Q & A
- What is the operating voltage range of the SN74HC253DBR?
The operating voltage range is from 2 V to 6 V.
- What is the typical propagation delay of the SN74HC253DBR at VCC = 5 V?
The typical propagation delay is 9 ns.
- How many data sources can each multiplexer select from?
Each multiplexer can select from 4 data sources.
- What is the maximum output current of the SN74HC253DBR?
The maximum output current is ±25 mA.
- What is the power consumption of the SN74HC253DBR?
The maximum power consumption (ICC) is 80 μA.
- Can the SN74HC253DBR perform parallel-to-serial conversion?
- What is the junction temperature range of the SN74HC253DBR?
The junction temperature range is up to 150 °C.
- What are the package options available for the SN74HC253DBR?
The device is available in SSOP (DB) package among others.
- Is the SN74HC253DBR suitable for high-speed applications?
- Can the SN74HC253DBR drive LSTTL loads?
