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Product short description:
  • Four 16-bit counters - TTL, and four 32-bit counters - RS422
  • Event counter
  • Frequency measurement
  • Quadrature position measurement
  • Pulse-width or periodic rate monitor
  • Watchdog timer with isolated relay output

Several models with a variety of configurations provide up to ten counter/timer channels for counting events, generating waveform control signals, measuring pulse-widths, periodic rates, or quadrature position and monitoring operations.

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Support for internal or external triggering simplifies the synchronization of operations to specific events. Counter functions can use internally generated clocks or an externally supplied clock.

  • Most configuration is handled by a single register which minimizes programming.
  • Pullups are socketed for easy adjustment.

Counter/Timers

Counter/timer configuration: AcPC483: Four 16-bit counters – TTL, Four 32-bit counters – RS422 – Other I/O mixes can be made available as specials.

Clock frequency: 20MHz.

Field I/O: Front panel SCSI-3 connector.

Speed (with 20MHz internal clock):
Maximum output pulse/square wave freq.: 200nS.
Minimum event pulse width: 100nS.
Minimum pulse width measurement: 100nS.
Minimum period measurement: 200nS.

Mode accuracy (with external clocking):
Waveform generation: Period is ±125nS.
Watchdog: Timeout occurs within ±1 clock cycle.
Pulse/period measurement: ±1 clock cycle.

Internal clocks: Programmable 1.25, 2.5, 5, 10 or 20MHz via the counter control register.

External clocks: Supported on a per-counter basis via clock line. Maximum frequency 8MHz.

Interrupts: Supported for watchdog timer time-out, event count complete, pulse width or periodic rate measurement complete, pulse wave complete (one-shot mode), successive waveform generation (continuous).

Triggering/gate: Programmable via register write or external trigger. Minimum pulse width 100nS. Line may be used for gating of counter.

Counter trigger: Interface for triggering counter functions. Input level is TTL or RS422 differential digital.

Counter input: Interface for events and pulse/period measurements. Also triggers load of watchdog timer register. Level is TTL or RS422 differential digital.

TTL compatibility: VIH = 2.0V and VIL = 0.8V. Inputs are buffered and include 4.7K ohm pull-ups to 5V.

Counter output: Level is TTL or RS422 differential digital.

Digital I/O

I/O channel configuration: 16 bi-directional TTL transceivers.Direction controlled as 16 independent channels.

CompactPCI bus Compliance

Meets PCI spec. V2.2 and PICMG 2.0, R3.0.

Data transfer bus: Slave with 32-bit, 16-bit, and 8-bit data transfer operation.

Interrupts (INTA#): Interrupt A is used to request an interrupt.

Plug-and-Play: The system maps the base address into the PCI bus 32-bit memory space.

Environmental

Operating temperature:
0 to 70°C or -40 to 85°C (E versions).

Storage temperature: -55 to 125°C.

Relative humidity: 5 to 95% non-condensing.

Power: 320mA at 5V, typical.

MTBF: Hours at 25°C, MIL-HDBK-217F, notice 2 1,727,707

  • Four 16-bit TTL counter/timers and four 32-bit RS422 counter/timers
  • Two 16-bit counters can be combined to create one 32-bit counter
  • 16 bi-directional digital I/O
  • 20MHz clock time base
  • Counter/timer functions:

  – Quadrature position measurement
– Pulse width modulation
– Watchdog timer
– Event counting
– Frequency measurement
– Period/pulse-width measurement
– One-shot/repetitive

  • 0 to 70°C or -40 to 85°C (E versions)

Manuals

AcPC483 User Manual (Log in to download the file)

Drawings & Diagrams

Additional information

Weight N/A
Dimensions N/A
Part Number

AcPC483: 16-bit counters – TTL, and Four 32-bit counters – RS422., AcPC483E: 16-bit counters – TTL, and Four 32-bit counters – RS422, Extended temperature range.

Communication
Configuration
FPGA Type
Logic Cells
Power
Product Series
  • Description

    Support for internal or external triggering simplifies the synchronization of operations to specific events. Counter functions can use internally generated clocks or an externally supplied clock.

    • Most configuration is handled by a single register which minimizes programming.
    • Pullups are socketed for easy adjustment.

    Counter/Timers

    Counter/timer configuration: AcPC483: Four 16-bit counters – TTL, Four 32-bit counters – RS422 – Other I/O mixes can be made available as specials.

    Clock frequency: 20MHz.

    Field I/O: Front panel SCSI-3 connector.

    Speed (with 20MHz internal clock):
    Maximum output pulse/square wave freq.: 200nS.
    Minimum event pulse width: 100nS.
    Minimum pulse width measurement: 100nS.
    Minimum period measurement: 200nS.

    Mode accuracy (with external clocking):
    Waveform generation: Period is ±125nS.
    Watchdog: Timeout occurs within ±1 clock cycle.
    Pulse/period measurement: ±1 clock cycle.

    Internal clocks: Programmable 1.25, 2.5, 5, 10 or 20MHz via the counter control register.

    External clocks: Supported on a per-counter basis via clock line. Maximum frequency 8MHz.

    Interrupts: Supported for watchdog timer time-out, event count complete, pulse width or periodic rate measurement complete, pulse wave complete (one-shot mode), successive waveform generation (continuous).

    Triggering/gate: Programmable via register write or external trigger. Minimum pulse width 100nS. Line may be used for gating of counter.

    Counter trigger: Interface for triggering counter functions. Input level is TTL or RS422 differential digital.

    Counter input: Interface for events and pulse/period measurements. Also triggers load of watchdog timer register. Level is TTL or RS422 differential digital.

    TTL compatibility: VIH = 2.0V and VIL = 0.8V. Inputs are buffered and include 4.7K ohm pull-ups to 5V.

    Counter output: Level is TTL or RS422 differential digital.

    Digital I/O

    I/O channel configuration: 16 bi-directional TTL transceivers.Direction controlled as 16 independent channels.

    CompactPCI bus Compliance

    Meets PCI spec. V2.2 and PICMG 2.0, R3.0.

    Data transfer bus: Slave with 32-bit, 16-bit, and 8-bit data transfer operation.

    Interrupts (INTA#): Interrupt A is used to request an interrupt.

    Plug-and-Play: The system maps the base address into the PCI bus 32-bit memory space.

    Environmental

    Operating temperature:
    0 to 70°C or -40 to 85°C (E versions).

    Storage temperature: -55 to 125°C.

    Relative humidity: 5 to 95% non-condensing.

    Power: 320mA at 5V, typical.

    MTBF: Hours at 25°C, MIL-HDBK-217F, notice 2 1,727,707

  • Features & Benefits

    • Four 16-bit TTL counter/timers and four 32-bit RS422 counter/timers
    • Two 16-bit counters can be combined to create one 32-bit counter
    • 16 bi-directional digital I/O
    • 20MHz clock time base
    • Counter/timer functions:

      – Quadrature position measurement
    – Pulse width modulation
    – Watchdog timer
    – Event counting
    – Frequency measurement
    – Period/pulse-width measurement
    – One-shot/repetitive

    • 0 to 70°C or -40 to 85°C (E versions)
  • Specs & Data Sheets

    Manuals

    AcPC483 User Manual (Log in to download the file)

    Drawings & Diagrams

  • Additional information

    Additional information

    Weight N/A
    Dimensions N/A
    Part Number

    AcPC483: 16-bit counters – TTL, and Four 32-bit counters – RS422., AcPC483E: 16-bit counters – TTL, and Four 32-bit counters – RS422, Extended temperature range.

    Communication
    Configuration
    FPGA Type
    Logic Cells
    Power
    Product Series