View source for Mesa Electronics 7i76 Step/Direction + I/O Daughter Card

== Overview ==

A 25-pin daughtercard for Mesa FPGA boards. There is are separate sourcing and sinking editions of the board for the field I/O.

== Wiring ==

* [http://www.mesanet.com/pdf/parallel/7i76man.pdf#page=9 Page 9] (3 in the PDF) shows the connector locations
* [http://www.mesanet.com/pdf/parallel/7i76man.pdf#page=10 Page 10] (4 in the PDF) shows the FPGA side DB-25 pinout
* [http://www.mesanet.com/pdf/parallel/7i76man.pdf#page=11 Pages 11-12] (5-6 in the PDF) show the TB2/TB3 step/direction pinouts
* [http://www.mesanet.com/pdf/parallel/7i76man.pdf#page=12 Page 12] (6 in the PDF) shows the TB3 encoder input pinout
* [http://www.mesanet.com/pdf/parallel/7i76man.pdf#page=12 Page 12] (6 in the PDF) shows the TB3 Smart Serial (RS-422) pinout
* [http://www.mesanet.com/pdf/parallel/7i76man.pdf#page=17 Page 17] (11 in the PDF) shows the TB3 Smart Serial (RS-422) pinout with CAT5 wiring scheme
* [http://www.mesanet.com/pdf/parallel/7i76man.pdf#page=13 Page 13] (7 in the PDF) shows the TB4 spindle output pinout
* [http://www.mesanet.com/pdf/parallel/7i76man.pdf#page=14 Pages 14-15] (8-9 in the PDF) show the TB5 field I/O pinout
* [http://www.mesanet.com/pdf/parallel/7i76man.pdf#page=16 Page 16] (10 in the PDF) shows the TB1 field power pinout

Give that all of the FPGA pins are being driven to +5V (high), the 7i76 has the following output levels with respect to digital ground:

{| class="wikitable"
! TBx Pin
! Voltage
|-
| STEP/DIRx+
| +5V (high)
|-
| STEP/DIRx-
| 0V (low)
|-
| RS-422 TX+
| 0V (low)
|-
| RS-422 TX-
| +5V (high)
|-
| RS-422 RX+
| +2.5V (invalid)
|-
| RS-422 RX-
| +2.5V (invalid)
|}

== Dimensions ==

* [http://www.mesanet.com/pdf/parallel/7i76man.pdf#page=58 Page 58] (52 in the PDF) shows a dimensional diagram

== Bill of Materials ==

{| class="wikitable"
! Name
! Marking
! Part
|-
| U2
| [intersil logo] ISL32174 EIBZ W1932AAUS [SOIC-16]
| [https://www.digikey.com/en/products/detail/renesas-electronics-america-inc/ISL32174EIBZ/2000536 Renesas ISL32174EIBZ]
|-
| U3
| NXP 74HCT14D 46560037 YXD1751F [SOIC-14]
| [https://www.digikey.com/en/products/detail/nexperia-usa-inc/74HCT14D-653/763119 NXP 74HCT14D]
|-
| U4,U5
| [onsemi logo] NCV7608 [SOIC-28]
| [https://www.digikey.com/en/products/detail/on-semiconductor/NCV7608DWR2G/2512559 onsemi NCV7608DWR2G]
|-
| U6
| [TI logo] 89AQCSK G4 26LS32AC [SOIC-16]
| [https://www.digikey.com/en/products/detail/texas-instruments/AM26LS32ACD/277025 Texas Instruments AM26LS32ACD]
|-
| U7
| [Analog Devices logo] 121N0BR #935* 86322 [SOIC-8]
| [https://www.digikey.com/en/products/detail/analog-devices-inc/ADUM121N0BRZ/5957959 Analog Devices ADUM121N0BRZ]
|-
| U8
| [Microchip logo] dsPIC33FJ16GS 402-I/SO (e3) 1925YJK [SOIC-28]
| [https://www.digikey.com/en/products/detail/microchip-technology/DSPIC33FJ16GS402-I-SO/2059890 Microchip DSPIC33FJ16GS402-I/SO]
|-
| U9
| [onsemi logo] ACT 540 PSLJ [TSSOP-20]
| [https://www.digikey.com/en/products/detail/onsemi/MC74ACT540DTR2G/1479746 onsemi MC74ACT540DTR2G]
|-
| U12
| [onsemi logo] ACT 541 PBLH [TSSOP-20]
| [https://www.digikey.com/en/products/detail/onsemi/MC74ACT541DTR2G/920949 onsemi MC74ACT541DTR2G]
|-
| U10,U11,U14,U15
| [TI logo] 8CAG0YM LV4051A G4 [SOIC-16]
| [https://www.digikey.com/en/products/detail/texas-instruments/SN74LV4051ADR/374746 Texas Instruments SN74LV4051ADR]
|-
| U13
| [onsemi logo] ACT04 PACL09 [SOIC-14]
| [https://www.digikey.com/en/products/detail/onsemi/74ACT04SC/211822 onsemi 74ACT04SC]
|-
| U16
| NXP HEF4001BT CKX97806 TXD16224 [SOIC-14]
| [https://www.digikey.com/en/products/detail/nexperia-usa-inc/HEF4001BT-653/1156354 NXP HEF4001BT]
|-
| U17
| [I logo] S5230 PMIYE [SOIC-8]
| [https://www.digikey.com/en/products/detail/onsemi/NE5230DR2G/1484306 onsemi NE5230DR2G]
|-
| O1,O2
| [Toshiba logo] 837 P127
| [https://www.digikey.com/en/products/detail/toshiba-semiconductor-and-storage/TLP127TPRUF/408661 Toshiba TLP127TPRUF]
|-
| O3
| [onsemi logo] H11L1 931Q [DIP-6]
| [https://www.digikey.com/en/products/detail/onsemi/H11L1/16519 onsemi H11L1]
|-
| P1
| AMP 171 04? 5747846-4
| [https://www.digikey.com/en/products/detail/te-connectivity-amp-connectors/5747846-4/808681 TE 5747846-4]
|-
| TB1,TB4
| 8-position 3.5mm pitch pluggable terminal block header
| [https://www.digikey.com/en/products/detail/phoenix-contact/1843664/2528299 Phoenix Contact 1843664]
|-
| TB2,TB3,TB5,TB6
| 24-position 3.5mm pitch pluggable terminal block header
| 
|-
| W1-W6
| 3-position 2.54mm pitch header for jumper
| [https://www.digikey.com/en/products/detail/adam-tech/PH1-03-UA/9830289 Adam Tech PH1-03-UA]
|}

== Online Resources ==

[http://www.mesanet.com/pdf/parallel/7i76man.pdf 7i76/7i76D Manual]

[http://store.mesanet.com/index.php?route=product/product&product_id=119 7i76 | Mesa Web Store]

[http://store.mesanet.com/index.php?route=product/product&product_id=322 7i76D | Mesa Web Store]