2 layers407 × 184 mm
TRS-80-Model I G E1
RetroStack/TRS-80-Model-I-G-E1
Hardware Replica of the TRS-80 Model I Revision G
230 parts57MIT
Overview
The 74LS156PC is a signal Switches, Multiplexers, Decoder made by onsemi in a PDIP-16 package with 16 pins. -20℃~+75℃ 100uA 4.75V~5.25V 53ns@5V,50pF 6.1mA 74LS 8mA Decoder Reverse function Single Supply PDIP-16 Signal Switches, Multiplexers, Decoders ROHS.
PCBKit's library has its KiCad symbol (74xx:74LS156, from KiCad's library) and its footprint (Package_DIP:DIP-16_W8.89mm_SMDSocket_LongPads, from KiCad's library), ready for a KiCad board. JLCPCB lists it (part C3231630). 9 open-source boards in 8 repositories on GitHub use it.
Symbol
Footprint
Parameters
10- Current - Output High(IOH)
- 100uA
- Current - Output Low(IOL)
- 8mA
- Function
- Reverse function
- Operating temperature
- -20℃~+75℃
- Propagation Delay
- 53ns@5V,50pF
- Quiescent Current
- 6.1mA
- Series
- 74LS
- Type
- Decoder
- Voltage - Supply
- 4.75V~5.25V
- Voltage Supply Source
- Single Supply
Order codes
1- 74LS156PCLCSC C3231630
Pinout
16| Pin | Name | Type |
|---|---|---|
| 1 | Ea1 | Input |
| 2 | Ea2 | Input |
| 3 | A1 | Input |
| 4 | Q3a | Output |
| 5 | Q2a | Output |
| 6 | Q1a | Output |
| 7 | Q0a | Output |
| 8 | GND | Power in |
| 9 | Q0b | Output |
| 10 | Q1b | Output |
| 11 | Q2b | Output |
| 12 | Q3b | Output |
| 13 | A0 | Input |
| 14 | Eb1 | Input |
| 15 | Eb2 | Input |
| 16 | VCC | Power in |
Open-source boards using it
All 9- 2 layers350 × 224.3 mm
- 4 layers244 × 244 mm
- 2 layers91.2 × 89 mm
RSYM-1 EXP MEMORY R3
dennisperry/RSYM-1_EXPANSION_MEMORY
This is a memory expansion board for the classic SYM-1 SBC. RAM is battery backed and the Flash ROM is held by a ZIF socket. ROM banks can be selected via switch settings.
48 partsMIT - 4 layers101.6 × 53.3 mm
RC201-68000 CPU 2
MarkD833/RCBUS-68xxx
My Motorola 68000 & 68302 processors (+ SIO, PIO & MFP boards) for the RCBus ecosystem.
38 parts8GPL-3.0 - 4 layers101.6 × 53.3 mm
RC205-68020 CPU 1
MarkD833/RCBUS-68xxx
My Motorola 68000 & 68302 processors (+ SIO, PIO & MFP boards) for the RCBus ecosystem.
45 parts8GPL-3.0 - 4 layers253.6 × 137.7 mm
S100 Thunder186-1.0-006
RichCini/LomasBoards
Small repository of files/data related to Lomas Data Products S-100 boards.
118 parts1 - 2 layers
VideoBoard
Cptscorcher/Excallibur-64
A reimagining of the seminal Excalibur 64 Computer
126 partsGPL-3.0
Show this part on your page
<iframe src="https://pcbkit.io/embed/parts/onsemi/74LS156PC" title="74LS156PC in PCBKit" width="100%" height="480" style="border:0;border-radius:12px" allow="fullscreen" loading="lazy"></iframe><img src="https://pcbkit.io/embed/parts/onsemi/74LS156PC.jpg" alt="74LS156PC" width="1200" height="900">[](https://pcbkit.io/parts/onsemi/74LS156PC)Questions
Is there a KiCad symbol and footprint for the 74LS156PC?
Yes. The symbol is 74xx:74LS156 and the footprint Package_DIP:DIP-16_W8.89mm_SMDSocket_LongPads, both drawn on this page. PCBKit places them on a board for you when you design with it.
What package is the 74LS156PC?
PDIP-16, with 16 pins. Its footprint is drawn on this page.
Where is the 74LS156PC datasheet?
onsemi publishes it: the Datasheet link on this page opens it.
Where can I order the 74LS156PC?
JLCPCB lists it as part C3231630, with 0 in stock; the sellers' links on this page open their listings.
What can replace the 74LS156PC?
Parts like it in the library: the SN74HC138NED-GMIC by GREENMICRO, the 74HC138N by HGSEMI, the 74HC139N by HGSEMI and the 74HC238N by HGSEMI. Check their datasheets: a part that fits the footprint may still differ in its ratings.
Which open-source boards use the 74LS156PC?
9 boards in 8 repositories on GitHub; the most starred are listed on this page, with their KiCad files.
Parts like it
8
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DIP-16-40℃~+85℃ 160uA 25mA 2V~6V 3/8 35ns@6.0V,50pF 4mA 74HC Decoder Reverse function Single Supply DIP-16 Signal Switches, Multiplexers, Decoders ROHSHGSEMISignal Switches, Multiplexers, Decoders74HC139N
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DIP-16-40℃~+85℃ 2V~5.5V 3/6 5ns@4.5V,50pF 74HC 8uA Dual Supply Output enable high-impedance、Tri-state output DIP-16 Signal Switches, Multiplexers, Decoders ROHSHGSEMISignal Switches, Multiplexers, Decoders