2 layers224.3 × 23.5 mm
Overview
The SN74HC157D is a signal Switches, Multiplexers, Decoder made by Texas Instruments in a SOIC-16 package with 16 pins. -40℃~+85℃ 21ns@6V,50pF 2V~6V 7.8mA 7.8mA 74HC 8/4 80uA Multiplexer Single Supply SOIC-16 Signal Switches, Multiplexers, Decoders ROHS.
PCBKit's library has its KiCad symbol (74xx:74LS157, 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. 606 are in stock at JLCPCB (part C6823). 1 open-source board in 1 repository on GitHub use it.
Symbol
Footprint
From the datasheet
9- Supply, least
- 2 V · VCC, recommended operating min · p. 4
- Supply, most
- 6 V · VCC, recommended operating max · p. 4
- Supply, absolute maximum
- 7 V · VCC, absolute max · p. 4
- Works from
- -55 °C · Operating free-air temperature min · p. 4
- Works up to
- 125 °C · Operating free-air temperature max · p. 4
- Junction, hottest
- 150 °C · Junction temperature absolute max · p. 4
- Takes working
- 160 µA · VCC supply current max, VCC = 6 V, inputs at rails, IO = 0 · p. 5
- A pin gives at most
- 35 mA · Continuous output source or sink current absolute max, VO = 0 to VCC · p. 4
- Junction to air (D (SOIC))
- 73 K/W · Junction-to-ambient thermal resistance · p. 4
What it is and has
5- Multiplexers
- Four 2:1 multiplexers · p. 8
- Output drive
- Up to 15 LSTTL loads · p. 1
- Output drive current
- ±6mA at 5V · p. 1
- Strobe
- Forces all Y outputs low · p. 8
- Channel selection
- Common address input for all four channels · p. 8
Around it
3- cap 0.1μF
- between VCC and GND; Recommended bypass capacitor at each VCC terminal; place physically close to the device with a short ground return. · p. 13
- cap 1μF
- between VCC and GND; Commonly used in parallel with 0.1uF to reject different noise frequencies. · p. 13
- res 10kΩ
- between input and VCC or GND; Recommended pull-up or pull-down when an input is not actively driven at all times. · p. 8
Specifications
94| Parameter | Conditions | As printed | Page |
|---|---|---|---|
| Supply voltage range VCC | Over operating free-air temperature range | min -0.5 · max 7 V | 4 |
| Input clamp current IIK | VI < 0 or VI > VCC; current magnitude, ±20 mA | max 20 mA | 4 |
| Output clamp current IOK | VO < 0 or VO > VCC; current magnitude, ±20 mA | max 20 mA | 4 |
| Continuous output current IO | VO = 0 to VCC; current magnitude, ±35 mA | max 35 mA | 4 |
| Continuous current through VCC or GND | Current magnitude, ±70 mA | max 70 mA | 4 |
| Junction temperature TJ | max 150 °C | 4 | |
| Storage temperature Tstg | min -65 · max 150 °C | 4 | |
| Supply voltage VCC | SN74HC157; nominal 5 V | min 2 · max 6 V | 4 |
| High-level input voltage VIH | SN74HC157; VCC = 2 V | min 1.5 V | 4 |
| High-level input voltage VIH | SN74HC157; VCC = 4.5 V | min 3.15 V | 4 |
| High-level input voltage VIH | SN74HC157; VCC = 6 V | min 4.2 V | 4 |
| Low-level input voltage VIL | SN74HC157; VCC = 2 V | max 0.5 V | 4 |
| Low-level input voltage VIL | SN74HC157; VCC = 4.5 V | max 1.35 V | 4 |
| Low-level input voltage VIL | SN74HC157; VCC = 6 V | max 1.8 V | 4 |
| Input voltage VI | SN74HC157; maximum is VCC | min 0 V | 4 |
| Output voltage VO | SN74HC157; maximum is VCC | min 0 V | 4 |
| Input transition rise/fall time tt | SN74HC157; VCC = 2 V | max 1000 ns | 4 |
| Input transition rise/fall time tt | SN74HC157; VCC = 4.5 V | max 500 ns | 4 |
| Input transition rise/fall time tt | SN74HC157; VCC = 6 V | max 400 ns | 4 |
| Operating free-air temperature TA | SN74HC157 | min -55 · max 125 °C | 4 |
| Junction-to-ambient thermal resistance RθJA | D (SOIC), 16 pins; table gives a single value without min/typ/max designation | typ 73 °C/W | 4 |
| VOH VOH | TA = 25°C; VCC = 2 V; IOH = −20 uA; VI = VIH or VIL | min 1.9 · typ 1.998 V | 5 |
| VOH VOH | SN74HC157; recommended operating free-air temperature range; VCC = 2 V; IOH = −20 uA; VI = VIH or VIL | min 1.9 V | 5 |
| VOH VOH | TA = 25°C; VCC = 4.5 V; IOH = −20 uA; VI = VIH or VIL | min 4.4 · typ 4.499 V | 5 |
| VOH VOH | SN74HC157; recommended operating free-air temperature range; VCC = 4.5 V; IOH = −20 uA; VI = VIH or VIL | min 4.4 V | 5 |
| VOH VOH | TA = 25°C; VCC = 6 V; IOH = −20 uA; VI = VIH or VIL | min 5.9 · typ 5.999 V | 5 |
| VOH VOH | SN74HC157; recommended operating free-air temperature range; VCC = 6 V; IOH = −20 uA; VI = VIH or VIL | min 5.9 V | 5 |
| VOH VOH | TA = 25°C; VCC = 4.5 V; IOH = −6 mA; VI = VIH or VIL | min 3.98 · typ 4.3 V | 5 |
| VOH VOH | SN74HC157; recommended operating free-air temperature range; VCC = 4.5 V; IOH = −6 mA; VI = VIH or VIL | min 3.7 V | 5 |
| VOH VOH | TA = 25°C; VCC = 6 V; IOH = −7.8 mA; VI = VIH or VIL | min 5.48 · typ 5.8 V | 5 |
| VOH VOH | SN74HC157; recommended operating free-air temperature range; VCC = 6 V; IOH = −7.8 mA; VI = VIH or VIL | min 5.2 V | 5 |
| VOL VOL | TA = 25°C; VCC = 2 V; IOL = 20 uA; VI = VIH or VIL | typ 0.002 · max 0.1 V | 5 |
| VOL VOL | SN74HC157; recommended operating free-air temperature range; VCC = 2 V; IOL = 20 uA; VI = VIH or VIL | max 0.1 V | 5 |
| VOL VOL | TA = 25°C; VCC = 4.5 V; IOL = 20 uA; VI = VIH or VIL | typ 0.001 · max 0.1 V | 5 |
| VOL VOL | SN74HC157; recommended operating free-air temperature range; VCC = 4.5 V; IOL = 20 uA; VI = VIH or VIL | max 0.1 V | 5 |
| VOL VOL | TA = 25°C; VCC = 6 V; IOL = 20 uA; VI = VIH or VIL | typ 0.001 · max 0.1 V | 5 |
| VOL VOL | SN74HC157; recommended operating free-air temperature range; VCC = 6 V; IOL = 20 uA; VI = VIH or VIL | max 0.1 V | 5 |
| VOL VOL | TA = 25°C; VCC = 4.5 V; IOL = 6 mA; VI = VIH or VIL | typ 0.17 · max 0.26 V | 5 |
| VOL VOL | SN74HC157; recommended operating free-air temperature range; VCC = 4.5 V; IOL = 6 mA; VI = VIH or VIL | max 0.4 V | 5 |
| VOL VOL | TA = 25°C; VCC = 6 V; IOL = 7.8 mA; VI = VIH or VIL | typ 0.15 · max 0.26 V | 5 |
| VOL VOL | SN74HC157; recommended operating free-air temperature range; VCC = 6 V; IOL = 7.8 mA; VI = VIH or VIL | max 0.4 V | 5 |
| II II | TA = 25°C; VCC = 6 V; VI = VCC or 0; current magnitudes, typical ±0.1 nA and maximum ±100 nA | typ 0.1 · max 100 nA | 5 |
| II II | SN74HC157; recommended operating free-air temperature range; VCC = 6 V; VI = VCC or 0; current magnitude, ±1000 nA | max 1000 nA | 5 |
| ICC ICC | TA = 25°C; VCC = 6 V; VI = VCC or 0; IO = 0 | max 8 uA | 5 |
| ICC ICC | SN74HC157; recommended operating free-air temperature range; VCC = 6 V; VI = VCC or 0; IO = 0 | max 160 uA | 5 |
| Ci Ci | TA = 25°C; VCC = 2 V to 6 V | typ 3 · max 10 pF | 5 |
| Ci Ci | SN74HC157; recommended operating free-air temperature range; VCC = 2 V to 6 V | max 10 pF | 5 |
| Propagation delay tpd | TA = 25°C; CL = 50 pF; A or B to Y; VCC = 2 V | typ 63 · max 125 ns | 5 |
| Propagation delay tpd | SN74HC157; recommended operating free-air temperature range; CL = 50 pF; A or B to Y; VCC = 2 V | max 190 ns | 5 |
| Propagation delay tpd | TA = 25°C; CL = 50 pF; A or B to Y; VCC = 4.5 V | typ 13 · max 25 ns | 5 |
| Propagation delay tpd | SN74HC157; recommended operating free-air temperature range; CL = 50 pF; A or B to Y; VCC = 4.5 V | max 38 ns | 5 |
| Propagation delay tpd | TA = 25°C; CL = 50 pF; A or B to Y; VCC = 6 V | typ 11 · max 21 ns | 5 |
| Propagation delay tpd | SN74HC157; recommended operating free-air temperature range; CL = 50 pF; A or B to Y; VCC = 6 V | max 32 ns | 5 |
| Propagation delay tpd | TA = 25°C; CL = 50 pF; A/B to Y; VCC = 2 V | typ 67 · max 125 ns | 5 |
| Propagation delay tpd | SN74HC157; recommended operating free-air temperature range; CL = 50 pF; A/B to Y; VCC = 2 V | max 190 ns | 5 |
| Propagation delay tpd | TA = 25°C; CL = 50 pF; A/B to Y; VCC = 4.5 V | typ 18 · max 25 ns | 5 |
| Propagation delay tpd | SN74HC157; recommended operating free-air temperature range; CL = 50 pF; A/B to Y; VCC = 4.5 V | max 38 ns | 5 |
| Propagation delay tpd | TA = 25°C; CL = 50 pF; A/B to Y; VCC = 6 V | typ 14 · max 21 ns | 5 |
| Propagation delay tpd | SN74HC157; recommended operating free-air temperature range; CL = 50 pF; A/B to Y; VCC = 6 V | max 32 ns | 5 |
| Propagation delay tpd | TA = 25°C; CL = 50 pF; G to Y; VCC = 2 V | typ 59 · max 115 ns | 5 |
| Propagation delay tpd | SN74HC157; recommended operating free-air temperature range; CL = 50 pF; G to Y; VCC = 2 V | max 170 ns | 5 |
| Propagation delay tpd | TA = 25°C; CL = 50 pF; G to Y; VCC = 4.5 V | typ 16 · max 23 ns | 5 |
| Propagation delay tpd | SN74HC157; recommended operating free-air temperature range; CL = 50 pF; G to Y; VCC = 4.5 V | max 34 ns | 5 |
| Propagation delay tpd | TA = 25°C; CL = 50 pF; G to Y; VCC = 6 V | typ 13 · max 20 ns | 5 |
| Propagation delay tpd | SN74HC157; recommended operating free-air temperature range; CL = 50 pF; G to Y; VCC = 6 V | max 29 ns | 5 |
| Transition time tt | TA = 25°C; CL = 50 pF; output Y; VCC = 2 V | typ 28 · max 60 ns | 5 |
| Transition time tt | SN74HC157; recommended operating free-air temperature range; CL = 50 pF; output Y; VCC = 2 V | max 90 ns | 5 |
| Transition time tt | TA = 25°C; CL = 50 pF; output Y; VCC = 4.5 V | typ 8 · max 12 ns | 5 |
| Transition time tt | SN74HC157; recommended operating free-air temperature range; CL = 50 pF; output Y; VCC = 4.5 V | max 18 ns | 5 |
| Propagation delay tpd | TA = 25°C; CL = 150 pF; A or B to Y; VCC = 2 V | typ 81 · max 190 ns | 6 |
| Propagation delay tpd | SN74HC157; recommended operating free-air temperature range; CL = 150 pF; A or B to Y; VCC = 2 V | max 235 ns | 6 |
| Propagation delay tpd | TA = 25°C; CL = 150 pF; A or B to Y; VCC = 4.5 V | typ 23 · max 38 ns | 6 |
| Propagation delay tpd | SN74HC157; recommended operating free-air temperature range; CL = 150 pF; A or B to Y; VCC = 4.5 V | max 47 ns | 6 |
| Propagation delay tpd | TA = 25°C; CL = 150 pF; A or B to Y; VCC = 6 V | typ 18 · max 33 ns | 6 |
| Propagation delay tpd | SN74HC157; recommended operating free-air temperature range; CL = 150 pF; A or B to Y; VCC = 6 V | max 41 ns | 6 |
| Propagation delay tpd | TA = 25°C; CL = 150 pF; A/B to Y; VCC = 2 V | typ 81 · max 210 ns | 6 |
| Propagation delay tpd | SN74HC157; recommended operating free-air temperature range; CL = 150 pF; A/B to Y; VCC = 2 V | max 260 ns | 6 |
| Propagation delay tpd | TA = 25°C; CL = 150 pF; A/B to Y; VCC = 4.5 V | typ 23 · max 42 ns | 6 |
| Propagation delay tpd | SN74HC157; recommended operating free-air temperature range; CL = 150 pF; A/B to Y; VCC = 4.5 V | max 52 ns | 6 |
| Propagation delay tpd | TA = 25°C; CL = 150 pF; A/B to Y; VCC = 6 V | typ 18 · max 36 ns | 6 |
| Propagation delay tpd | SN74HC157; recommended operating free-air temperature range; CL = 150 pF; A/B to Y; VCC = 6 V | max 45 ns | 6 |
| Propagation delay tpd | TA = 25°C; CL = 150 pF; G to Y; VCC = 2 V | typ 91 · max 190 ns | 6 |
| Propagation delay tpd | SN74HC157; recommended operating free-air temperature range; CL = 150 pF; G to Y; VCC = 2 V | max 235 ns | 6 |
| Propagation delay tpd | TA = 25°C; CL = 150 pF; G to Y; VCC = 4.5 V | typ 24 · max 38 ns | 6 |
| Propagation delay tpd | SN74HC157; recommended operating free-air temperature range; CL = 150 pF; G to Y; VCC = 4.5 V | max 47 ns | 6 |
| Propagation delay tpd | TA = 25°C; CL = 150 pF; G to Y; VCC = 6 V | typ 18 · max 33 ns | 6 |
| Propagation delay tpd | SN74HC157; recommended operating free-air temperature range; CL = 150 pF; G to Y; VCC = 6 V | max 41 ns | 6 |
| Transition time tt | TA = 25°C; CL = 150 pF; output Y; VCC = 2 V | typ 45 · max 210 ns | 6 |
| Transition time tt | SN74HC157; recommended operating free-air temperature range; CL = 150 pF; output Y; VCC = 2 V | max 265 ns | 6 |
| Transition time tt | TA = 25°C; CL = 150 pF; output Y; VCC = 4.5 V | typ 17 · max 42 ns | 6 |
| Transition time tt | SN74HC157; recommended operating free-air temperature range; CL = 150 pF; output Y; VCC = 4.5 V | max 53 ns | 6 |
| Transition time tt | TA = 25°C; CL = 150 pF; output Y; VCC = 6 V | typ 13 · max 36 ns | 6 |
| Transition time tt | SN74HC157; recommended operating free-air temperature range; CL = 150 pF; output Y; VCC = 6 V | max 45 ns | 6 |
| Power dissipation capacitance Cpd | TA = 25°C; No load | typ 40 pF | 6 |
Pins, by the datasheet
16- 1 A/B
- Address select. · p. 3
- 2 1A
- Channel 1, data input A. · p. 3
- 3 1B
- Channel 1, data input B. · p. 3
- 4 1Y
- Channel 1, data output. · p. 3
- 5 2A
- Channel 2, data input A. · p. 3
- 6 2B
- Channel 2, data input B. · p. 3
- 7 2Y
- Channel 2, data output. · p. 3
- 8 GND
- Ground. · p. 3
- 9 3Y
- Channel 3, data output. · p. 3
- 10 3B
- Channel 3, data input B. · p. 3
- 11 3A
- Channel 3, data input A. · p. 3
- 12 4Y
- Channel 4, data output. · p. 3
- 13 4B
- Channel 4, data input B. · p. 3
- 14 4A
- Channel 4, data input A. · p. 3
- 15 G
- Output strobe, active low. · p. 3
- 16 VCC
- Positive supply. · p. 3
Ordering codes, by the datasheet
1- SN74HC157PWT
- TSSOP (PW), 16 pins · Obsolete; operating temperature -40 to 85°C; package quantity and carrier unspecified. · p. 18
Parameters
15- Current - Output High(IOH)
- 7.8mA
- Current - Output Low(IOL)
- 7.8mA
- Current - Supply
- 160uA
- Junction Temperature(Max)
- 150℃
- Number of lines
- 8/4
- Operating temperature
- -55℃~+125℃
- Output Current per Pin(Max)
- 35mA
- Propagation Delay
- 21ns@6V,50pF
- Quiescent Current
- 80uA
- Series
- 74HC
- Thermal Resistance(Junction to Ambient)
- 73℃/W
- Type
- Multiplexer
- Voltage - Supply
- 2V~6V
- Voltage - Supply(Absolute Max)
- 7V
- Voltage Supply Source
- Single Supply
Order codes
1- SN74HC157DRLCSC C6823
Pinout
16| Pin | Name | Type |
|---|---|---|
| 1 | S | Input |
| 2 | I0a | Input |
| 3 | I1a | Input |
| 4 | Za | Output |
| 5 | I0b | Input |
| 6 | I1b | Input |
| 7 | Zb | Output |
| 8 | GND | Power in |
| 9 | Zc | Output |
| 10 | I1c | Input |
| 11 | I0c | Input |
| 12 | Zd | Output |
| 13 | I1d | Input |
| 14 | I0d | Input |
| 15 | E | Input |
| 16 | VCC | Power in |
Open-source boards using it
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Is there a KiCad symbol and footprint for the SN74HC157D?
Yes. The symbol is 74xx:74LS157 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 SN74HC157D?
SOIC-16, with 16 pins. Its footprint is drawn on this page.
Where is the SN74HC157D datasheet?
Texas Instruments publishes it: the Datasheet link on this page opens it.
Where can I order the SN74HC157D?
JLCPCB lists it as part C6823, with 606 in stock; the sellers' links on this page open their listings.
What can replace the SN74HC157D?
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.
Which open-source boards use the SN74HC157D?
1 board in 1 repository on GitHub; the most starred are listed on this page, with their KiCad files.
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