Overview
The SN74LS148D is a signal Switches, Multiplexers, Decoder made by Texas Instruments in a SOIC-16 package with 16 pins. 0℃~+70℃ 10mA 25ns@5V,15pF 4.75V~5.25V 400uA 74LS 8/3 8mA Decoder Single Supply SOIC-16 Signal Switches, Multiplexers, Decoders ROHS.
PCBKit's library has its KiCad symbol (74xx:74LS148, from KiCad's library) and its footprint (Package_SO:SOIC-16_3.9x9.9mm_P1.27mm, from KiCad's library), ready for a KiCad board. 2,500 are in stock at JLCPCB (part C2674594).
Symbol
Footprint
From the datasheet
9- Supply, least
- 4.75 V · VCC, recommended operating min · p. 7
- Supply, most
- 5.25 V · VCC, recommended operating max · p. 7
- Supply, absolute maximum
- 7 V · VCC, absolute max · p. 7
- Works from
- 0 °C · Operating free-air temperature min · p. 7
- Works up to
- 70 °C · Operating free-air temperature max · p. 7
- Takes working
- 12 mA · VCC supply current typical, inputs 7 and EI grounded · p. 9
- Takes at most
- 20 mA · VCC supply current max, inputs 7 and EI grounded · p. 9
- A pin gives at most
- 8 mA · Low-level output sink current max, recommended operating · p. 7
- Junction to air (D)
- 73 K/W · Junction-to-ambient package thermal impedance · p. 7
What it is and has
5- Encoding
- Eight data lines to three-line binary (octal) · p. 2
- Priority decoding
- Highest-order data line is encoded · p. 2
- Cascading
- Enable input EI and enable output EO allow octal expansion · p. 2
- Logic polarity
- Active-low data inputs and outputs · p. 2
- Package options
- D, N, or NS · p. 1
Specifications
37| Parameter | Conditions | As printed | Page |
|---|---|---|---|
| Supply voltage VCC | See Note 1 | max 7 V | 7 |
| Input voltage VI | ’LS147, ’LS148 | max 7 V | 7 |
| Package thermal impedance θJA | D package; see Note 3 | typ 73 °C/W | 7 |
| Storage temperature range Tstg | min -65 · max 150 °C | 7 | |
| Supply voltage VCC | SN74LS’ | min 4.75 · typ 5 · max 5.25 V | 7 |
| High-level output current IOH | SN74LS’ | max -400 uA | 7 |
| Low-level output current IOL | SN74LS’ | max 8 mA | 7 |
| Operating free-air temperature TA | SN74LS’ | min 0 · max 70 °C | 7 |
| High-level input voltage VIH | SN74LS’ | min 2 V | 9 |
| Low-level input voltage VIL | SN74LS’ | max 0.8 V | 9 |
| Input clamp voltage VIK | SN74LS’; VCC = MIN, II = −18 mA | max -1.5 V | 9 |
| High-level output voltage VOH | SN74LS’; VCC = MIN, VIH = 2 V, VIL = 0.8 V, IOH = −400 uA; typical at VCC = 5 V, TA = 25°C | min 2.7 · typ 3.4 V | 9 |
| Low-level output voltage VOL | SN74LS’; VCC = MIN, VIH = 2 V, VIL = VIL MAX, IOL = 4 mA; typical at VCC = 5 V, TA = 25°C | typ 0.25 · max 0.4 V | 9 |
| Low-level output voltage VOL | SN74LS’; VCC = MIN, VIH = 2 V, VIL = VIL MAX, IOL = 8 mA; typical at VCC = 5 V, TA = 25°C | typ 0.35 · max 0.5 V | 9 |
| Input current at maximum input voltage II | SN74LS’; ’LS148 inputs 1–7; VCC = MAX, VI = 7 V | max 0.2 mA | 9 |
| Input current at maximum input voltage II | SN74LS’; all other inputs; VCC = MAX, VI = 7 V | max 0.1 mA | 9 |
| High-level input current IIH | SN74LS’; ’LS148 inputs 1–7; VCC = MAX, VI = 2.7 V | max 40 uA | 9 |
| High-level input current IIH | SN74LS’; all other inputs; VCC = MAX, VI = 2.7 V | max 20 uA | 9 |
| Low-level input current IIL | SN74LS’; ’LS148 inputs 1–7; VCC = MAX, VI = 0.4 V | max -0.8 mA | 9 |
| Low-level input current IIL | SN74LS’; all other inputs; VCC = MAX, VI = 0.4 V | max -0.4 mA | 9 |
| Short-circuit output current§ IOS | SN74LS’; VCC = MAX; not more than one output shorted at a time | min -20 · max -100 mA | 9 |
| Supply current ICC | SN74LS148; VCC = MAX; Condition 1: inputs 7 and EI grounded, other inputs and outputs open; typical at VCC = 5 V, TA = 25°C | typ 12 · max 20 mA | 9 |
| Supply current ICC | SN74LS148; VCC = MAX; Condition 2: all inputs and outputs open; typical at VCC = 5 V, TA = 25°C | typ 10 · max 17 mA | 9 |
| Propagation delay time, low-to-high-level output tPLH | SN74LS148; inputs 1–7 to A0, A1, or A2; in-phase output; CL = 15 pF, RL = 2 kΩ | typ 14 · max 18 ns | 10 |
| Propagation delay time, high-to-low-level output tPHL | SN74LS148; inputs 1–7 to A0, A1, or A2; in-phase output; CL = 15 pF, RL = 2 kΩ | typ 15 · max 25 ns | 10 |
| Propagation delay time, low-to-high-level output tPLH | SN74LS148; inputs 1–7 to A0, A1, or A2; out-of-phase output; CL = 15 pF, RL = 2 kΩ | typ 20 · max 36 ns | 10 |
| Propagation delay time, high-to-low-level output tPHL | SN74LS148; inputs 1–7 to A0, A1, or A2; out-of-phase output; CL = 15 pF, RL = 2 kΩ | typ 16 · max 29 ns | 10 |
| Propagation delay time, low-to-high-level output tPLH | SN74LS148; inputs 0–7 to EO; out-of-phase output; CL = 15 pF, RL = 2 kΩ | typ 7 · max 18 ns | 10 |
| Propagation delay time, high-to-low-level output tPHL | SN74LS148; inputs 0–7 to EO; out-of-phase output; CL = 15 pF, RL = 2 kΩ | typ 25 · max 40 ns | 10 |
| Propagation delay time, low-to-high-level output tPLH | SN74LS148; inputs 0–7 to GS; in-phase output; CL = 15 pF, RL = 2 kΩ | typ 35 · max 55 ns | 10 |
| Propagation delay time, high-to-low-level output tPHL | SN74LS148; inputs 0–7 to GS; in-phase output; CL = 15 pF, RL = 2 kΩ | typ 9 · max 21 ns | 10 |
| Propagation delay time, low-to-high-level output tPLH | SN74LS148; EI to A0, A1, or A2; in-phase output; CL = 15 pF, RL = 2 kΩ | typ 16 · max 25 ns | 10 |
| Propagation delay time, high-to-low-level output tPHL | SN74LS148; EI to A0, A1, or A2; in-phase output; CL = 15 pF, RL = 2 kΩ | typ 12 · max 25 ns | 10 |
| Propagation delay time, low-to-high-level output tPLH | SN74LS148; EI to GS; in-phase output; CL = 15 pF, RL = 2 kΩ | typ 12 · max 17 ns | 10 |
| Propagation delay time, high-to-low-level output tPHL | SN74LS148; EI to GS; in-phase output; CL = 15 pF, RL = 2 kΩ | typ 14 · max 36 ns | 10 |
| Propagation delay time, low-to-high-level output tPLH | SN74LS148; EI to EO; in-phase output; CL = 15 pF, RL = 2 kΩ | typ 12 · max 21 ns | 10 |
| Propagation delay time, high-to-low-level output tPHL | SN74LS148; EI to EO; in-phase output; CL = 15 pF, RL = 2 kΩ | typ 23 · max 35 ns | 10 |
Pins, by the datasheet
16- 1 4
- Active-low data input 4. · p. 1
- 2 5
- Active-low data input 5. · p. 1
- 3 6
- Active-low data input 6. · p. 1
- 4 7
- Active-low data input 7. · p. 1
- 5 EI
- Enable input for cascading. · p. 1
- 6 A2
- Active-low encoded binary output A2. · p. 1
- 7 A1
- Active-low encoded binary output A1. · p. 1
- 8 GND
- Ground. · p. 1
- 9 A0
- Active-low encoded binary output A0. · p. 1
- 10 0
- Active-low data input 0. · p. 1
- 11 1
- Active-low data input 1. · p. 1
- 12 2
- Active-low data input 2. · p. 1
- 13 3
- Active-low data input 3. · p. 1
- 14 GS
- GS output. · p. 1
- 15 E0
- Enable output for cascading, called EO in the description. · p. 1
- 16 VCC
- Supply voltage. · p. 1
Ordering codes, by the datasheet
7- SN74LS148N
- PDIP − N · Tube; 0°C to 70°C · p. 2
- SN74LS148D
- SOIC − D · Tube; 0°C to 70°C · p. 2
- SN74LS148DR
- SOIC − D · Tape and reel; 0°C to 70°C · p. 2
- SN74LS148NSR
- SOP − NS · Tape and reel; 0°C to 70°C · p. 2
- SNJ54LS148J
- CDIP − J · Tube; −55°C to 125°C · p. 2
- SNJ54LS148W
- CFP − W · Tube; −55°C to 125°C · p. 2
- SNJ54LS148FK
- LCCC − FK · Tube; −55°C to 125°C · p. 2
Parameters
15- Current - Output High(IOH)
- 400uA
- Current - Output Low(IOL)
- 8mA
- Current - Supply
- 12mA
- Current - Supply(Max)
- 20mA
- Number of lines
- 8/3
- Operating temperature
- 0℃~+70℃
- Output Current per Pin(Max)
- 8mA
- Propagation Delay
- 25ns@5V,15pF
- Quiescent Current
- 10mA
- Series
- 74LS
- Thermal Resistance(Junction to Ambient)
- 73℃/W
- Type
- Decoder
- Voltage - Supply
- 4.75V~5.25V
- Voltage - Supply(Absolute Max)
- 7V
- Voltage Supply Source
- Single Supply
Order codes
2- SN74LS148DLCSC C1547141
- SN74LS148DRLCSC C2674594
Pinout
16| Pin | Name | Type |
|---|---|---|
| 1 | I4 | Input |
| 2 | I5 | Input |
| 3 | I6 | Input |
| 4 | I7 | Input |
| 5 | EI | Input |
| 6 | S2 | Output |
| 7 | S1 | Output |
| 8 | GND | Power in |
| 9 | S0 | Output |
| 10 | IO | Input |
| 11 | I1 | Input |
| 12 | I2 | Input |
| 13 | I3 | Input |
| 14 | GS | Output |
| 15 | EO | Output |
| 16 | VCC | Power in |
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Is there a KiCad symbol and footprint for the SN74LS148D?
Yes. The symbol is 74xx:74LS148 and the footprint Package_SO:SOIC-16_3.9x9.9mm_P1.27mm, both drawn on this page. PCBKit places them on a board for you when you design with it.
What package is the SN74LS148D?
SOIC-16, with 16 pins. Its footprint is drawn on this page.
Where is the SN74LS148D datasheet?
Texas Instruments publishes it: the Datasheet link on this page opens it.
Where can I order the SN74LS148D?
JLCPCB lists it as part C2674594, with 2,500 in stock; the sellers' links on this page open their listings.
What can replace the SN74LS148D?
Parts like it in the library: the 74HC4053M/TR by HGSEMI, the SN74HC138D by Texas Instruments, the 74HC138D by JSMSEMI and the MC74HC138AD by onsemi. Check their datasheets: a part that fits the footprint may still differ in its ratings.
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