SN74LS48N Texas Instruments Integrated Circuit (Dual-In-Line Packages) In Stock
Texas Instruments SN74LS48N is a BCD-to-seven-segment decoder and driver IC in a 16-pin PDIP package operating from 0°C to 70°C, featuring ripple blanking and lamp test inputs for driving common-cathode LED and LCD numeric displays.
- Manufacturer
- Texas Instruments
- Package
- Dual-In-Line Packages
- Pin Count
- 16
- Lifecycle
- OBSOLETE
- Datasheet
- SN74LS48N Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- ?°C to 70.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- BCD-to-seven-segment decoder with ripple blanking input for suppressing leading/trailing zeros in multi-digit display systems
- Lamp test input allows full-segment illumination check in a single 16-pin DIP package for production and field diagnostics
- LS-family low-power Schottky logic with 15 pF load capacitance and 8 mA sink current drives common-cathode seven-segment displays directly
Applications
The SN74LS48N is a classic BCD-to-seven-segment decoder widely used in numeric panel meters, digital clocks, frequency counters, and educational electronics projects that drive common-cathode seven-segment LED displays. Its ripple blanking capability allows cascading multiple SN74LS48N units to suppress non-significant zeros in multi-digit readouts on industrial process displays and laboratory bench instruments. The 16-pin DIP package makes it accessible for through-hole PCB assembly and breadboard prototyping in educational kits and legacy industrial equipment.
Specifications
| Pbfree Code | No |
| YTEOL | 0 |
| Additional Feature | RIPPLE BLANKING; LAMP TEST INPUT |
| Family | LS |
| Input Conditioning | STANDARD |
| JESD-30 Code | R-PDIP-T16 |
| Load Capacitance (CL) | 15pF |
| Logic IC Type | SEVEN SEGMENT DECODER/DRIVER |
| Max I(ol) | 0.008A |
| Number of Functions | 1 |
| Output Characteristics | OPEN-COLLECTOR WITH PULLUP |
| Output Polarity | TRUE |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | DIP16,.3 |
| Package Shape | RECTANGULAR |
| Package Style | IN-LINE |
| Peak Reflow Temperature (Cel) | NOT SPECIFIED |
| Power Supply Current-Max (ICC) | 38mA |
| Prop. Delay@Nom-Sup | 100ns |
| Propagation Delay (tpd) | 100ns |
| Qualification Status | Not Qualified |
| Supply Voltage-Max (Vsup) | 5.25V |
| Supply Voltage-Min (Vsup) | 4.75V |
| Supply Voltage-Nom (Vsup) | 5V |
| Surface Mount | NO |
| Technology | TTL |
| Temperature Grade | COMMERCIAL |
| Terminal Form | THROUGH-HOLE |
| Terminal Pitch | 2.54mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | NOT SPECIFIED |
| ## SN74LS48N Alternates Showing results | Image |
| Package | Dual-In-Line Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.60 |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
How does the ripple blanking feature of SN74LS48N suppress zeros in a multi-digit display?
The SN74LS48N includes a ripple blanking input (RBI) and ripple blanking output (RBO) that can be chained between multiple decoder stages. When RBI is asserted low and the BCD input is zero, the IC blanks all 7 segments and pulls RBO low to propagate the blanking signal to adjacent digits. This allows a 4-digit display driven by 4 cascaded SN74LS48N units to suppress leading zeros — for example, displaying 42 instead of 0042 — without any software intervention.
What sink current does SN74LS48N provide for driving seven-segment LED displays?
The SN74LS48N provides a maximum output low sink current (I(ol)) of 8 mA per segment output, which is sufficient to drive standard 5 mm common-cathode seven-segment LED displays directly when appropriate current-limiting resistors are added in series. With 15 pF load capacitance per output and LS-family switching speeds, the IC supports display refresh rates well above 60 Hz, making flicker-free digit rendering straightforward in static-drive panel meter and counter circuits.
For a new design requiring BCD decoding, when is SN74LS48N a practical alternative to software-driven GPIO segment mapping?
The SN74LS48N is a practical hardware alternative when the MCU has limited GPIO pins or when the display decoding must be offloaded entirely to dedicated logic, freeing the processor for other tasks. Driving a 7-segment display via SN74LS48N requires only 4 BCD input lines from the MCU instead of 7 individual segment lines, reducing pin usage by 3 per digit. This trade-off is especially cost-effective in legacy 8-bit microcontroller designs, industrial counters, and educational kits where through-hole 16-pin DIP assembly is preferred over SMD.
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About Texas Instruments
Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
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