Part Details for DM74LS244N by Texas Instruments
Results Overview of DM74LS244N by Texas Instruments
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DM74LS244N Information
DM74LS244N by Texas Instruments is a Bus Driver/Transceiver.
Bus Driver/Transceivers are under the broader part category of Logic Components.
Digital logic governs the behavior of signals in electronic circuits, enabling complex decisions based on simple binary inputs (yes/no). Logic components perform operations from these signals. Read more about Logic Components on our Logic part category page.
US Tariff Estimator: DM74LS244N by Texas Instruments
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DM74LS244N Part Data Attributes
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DM74LS244N
Texas Instruments
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Datasheet
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DM74LS244N
Texas Instruments
Bus Driver, LS Series, 2-Func, 4-Bit, True Output, TTL, PDIP20
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| Rohs Code | No | |
| Part Life Cycle Code | Transferred | |
| Package Description | Dip, Dip20,.3 | |
| Reach Compliance Code | Unknown | |
| HTS Code | 8542.39.00.60 | |
| Additional Feature | Min Input Hysteresis = 0.2v | |
| Control Type | Enable Low | |
| Family | Ls | |
| JESD-30 Code | R-PDIP-T20 | |
| JESD-609 Code | e0 | |
| Length | 26.075 Mm | |
| Load Capacitance (CL) | 150 Pf | |
| Logic IC Type | Bus Driver | |
| Max I(ol) | 0.024 A | |
| Number of Bits | 4 | |
| Number of Functions | 2 | |
| Number of Ports | 2 | |
| Number of Terminals | 20 | |
| Operating Temperature-Max | 70 °C | |
| Operating Temperature-Min | ||
| Output Characteristics | 3-State | |
| Output Polarity | True | |
| Package Body Material | Plastic/Epoxy | |
| Package Code | DIP | |
| Package Equivalence Code | DIP20,.3 | |
| Package Shape | Rectangular | |
| Package Style | In-Line | |
| Power Supply Current-Max (ICC) | 46 Ma | |
| Prop. Delay@Nom-Sup | 22 Ns | |
| Propagation Delay (tpd) | 22 Ns | |
| Qualification Status | Not Qualified | |
| Seated Height-Max | 5.08 Mm | |
| Supply Voltage-Max (Vsup) | 5.25 V | |
| Supply Voltage-Min (Vsup) | 4.75 V | |
| Supply Voltage-Nom (Vsup) | 5 V | |
| Surface Mount | No | |
| Technology | Ttl | |
| Temperature Grade | Commercial | |
| Terminal Finish | Tin/Lead (Sn/Pb) | |
| Terminal Form | Through-Hole | |
| Terminal Pitch | 2.54 Mm | |
| Terminal Position | Dual | |
| Width | 6.604 Mm |
DM74LS244N Frequently Asked Questions (FAQ)
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The maximum frequency of operation for the DM74LS244N is typically around 30-40 MHz, but it can vary depending on the specific application and operating conditions.
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To ensure reliable operation in high-temperature environments, it's essential to follow proper thermal management practices, such as providing adequate heat sinking, using a thermally conductive PCB material, and keeping the device within its recommended operating temperature range (0°C to 70°C).
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The DM74LS244N is designed to operate at 5V, but it can also be used in 3.3V systems with some limitations. However, the output voltage levels may not be compatible with 3.3V logic, and the device's performance may be degraded. It's recommended to use a level translator or voltage regulator to ensure proper operation.
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To handle bus contention when using multiple DM74LS244N devices, it's essential to ensure that only one device is driving the bus at a time. This can be achieved by using a bus arbiter or a multiplexer to control access to the bus, or by using a pull-up or pull-down resistor to prevent bus contention.
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The recommended termination scheme for the DM74LS244N depends on the specific application and bus topology. However, a common practice is to use a pull-up resistor (e.g., 1 kΩ) at the far end of the bus, and a series terminator (e.g., 33 Ω) at the near end of the bus to reduce reflections and improve signal integrity.