64 bit TTL I/O (Bit I/O)

  • Standard single-width 32 bit PMC module
  • 64 TTL I/O lines
  • Programmable I/O direction (input, output, tri-state)
  • Selectable pull-up voltages (+3.3 V or +5 V)
  • ESD protection
  • Input events can be enabled and detected individually for each I/O line
  • Front panel I/O via HD68 SCSI-3 type connector
  • Rear I/O via P14

Product status: Active

Operating Temperature Range -40 °C to +85 °C RoHS compliant

The TPMC681 is a standard single-width 32 bit PMC module offering 64 ESD-protected TTL I/O lines.

Each I/O line is individually programmable as input, output or tri-state.

The receivers are always enabled, which allows determining the state of each I/O line at any time.This can be used as read back function for lines configured as outputs.

Each I/O line has a pull-up resistor. The pull-up voltage is selectable to be either +3.3V or +5V.

Each input can generate an interrupt. Signal edge handling is programmable to interrupt on rising and/or falling edge of an input signal. Interrupts can be enabled and disabled for each I/O line. For interrupt source detection the status of each bit can be read from interrupt status registers.

The TPMC681 provides front panel I/O via a HD68 SCSI-3 type connector and rear panel I/O via P14.

Software Support (TDRV006-SW-xx) for different operating systems is available.

Mechanical Interface PCI Mezzanine Card (PMC) Interface confirming to IEEE P1386/P1386.1; Single Size
Electrical Interface PCI Rev. 3.0 compatible; 33 MHz / 32 bit PCI; 3.3V and 5V PCI Signaling Voltage
PCI Target Chip and Local Control Logic CPLD MachXO2 LCMXO2-4000HC-5BG332I (Lattice)
TTL Transceivers 74LVT126
Number of I/O Lines 64 Bit I/O
TTL signaling voltage level (maximum current: +/-24mA)
I/O Connector Front panel HD68 SCSI-3 type connector (TE 5787082-7)
PMC P14 I/O (64pin Mezzanine Connector)
Power Requirements 45mA typical (no load) @ +5V DC
Temperature Range Operating: -40°C to +85°C
Storage: -40°C to +125°C
Humidity 5 – 95% non-condensing
MTBF 597 000 h
Weight 70 g



64 bit TTL I/O (Bit I/O)

64 TTL I/O; each I/O is individually programmable; Front I/O via HD68 / SCSI-3 connector; Rear I/O


HD68 / SCSI-3 Cable

HD68 / SCSI-3 Terminal Block

Cable Kit for Modules with HD68 / SCSI-3 Connector

PIM I/O Module with HD68 SCSI-3 type Connector and special pin assignment


Device Driver for supported Digital I/O Family

Data Sheet

Data Sheet

Data Sheet - Issue 2.0.1

User Manual

User Manual - Issue 2.0.0