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Number of Counters:

Counter Resolution:

bits

Maximum Count Frequency:

On-board Oscillator Frequency:

Output Compatibility:

Counter Type:

Direction:

Bus Type:

Connector Type:

Digital I/O Channels?

Analog I/O Channels?

Agency Approvals?

Application Software Included?

One-shot Output?

Selectable Input Frequency?

Operating Temperature:

Allow up to: overrange/margin
Use the overrange/margin to restrict your search to items whose full-scale range is close to your requirements.
(Overrange/margin requires both 'From' and 'To' values to work.)

Operating Humidity:

%
Allow up to: overrange/margin
Use the overrange/margin to restrict your search to items whose full-scale range is close to your requirements.
(Overrange/margin requires both 'From' and 'To' values to work.)

Help with Counter and Timer Boards specifications:

Performance Specifications
   Number of Counters       The total number of counters contained on the computer board. 
   Search Logic:      User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.
   Counter Resolution       The resolution, in bits, of each counter.  The number of bits available for the counter timers. The number of events that the counter can count is determined by:  number of events = 2resolution
   Search Logic:      All matching products will have a value greater than or equal to the specified value.
   Maximum Count Frequency       The highest frequency that can be counted by the counter / timer.  The highest external input frequency. 
   Search Logic:      All matching products will have a value greater than or equal to the specified value.
   On-board Oscillator Frequency       The frequency of the on-board oscillator, or on-board clock. 
   Search Logic:      All matching products will have a value greater than or equal to the specified value.
   Output Compatibility       
   Your choices are...         
   TTL       The digital I/O circuitry is transistor-transistor logic (TTL) compatible. 
   CMOS       The digital I/O circuitry is Complementary Metal Oxide Semiconductor (CMOS) compatible. 
   Other       Other unlisted, specialized, or proprietary I/O compatibility. 
   Search Logic:      All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.
   Counter Type       
   Your choices are...         
   BCD / Decade Counter       A Binary Coded Decimal (BCD) counter produces counting sequence from 0 to 9 for an UP counter, and from 9 to 0 for a DOWN counter. This type of counter is also known as a decade counter. 
   MOD-N Binary Counter       The counter produces a binary counting sequence with a maximum value set only by the number of Flip-Flops in the counter. These types of counters are also known as Divide-by-N counters or Mod-N counters, where N represents the number of states in its counting sequence. 
   Johnson Counter       A Johnson counter is based around a shift register.  The features of Johnson counters become significant for larger counters. The division ratio is restricted to twice the number of flip-flops.  The number of logic gates is always low, and so the counter is fast. 
   Ring Counter       A loop or ring of "counter" stages, in which only one flip-flop will be set at any given time.  An input trigger pulse causes the "on" state to move to the adjacent stage. Thus, the "on" state moves around the loop. 
   Bi-quinary Counter       A decade counter in which the MSB is low for five states and high for the other five states (two counts of five states). This produces a 50% duty cycle on the output (square wave). 
   Other       Other unlisted, specialized, or proprietary counter type. 
   Search Logic:      All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.
   Direction       
   Your choices are...         
   UP Only       The counter can advance forward (UP) in its counting sequence. 
   DOWN Only       The counter can advance backward (DOWN) in its counting sequence. 
   UP / DOWN       The counter can advance forward or backward (UP or DOWN) in its counting sequence. 
   Other       Other unlisted, specialized, or proprietary direction. 
   Search Logic:      All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.
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System Specifications
   Bus Type       
   Your choices are...         
   CompactPCI / PXI       Compact PCI (cPCI) is a high-performance industrial bus that uses the electrical standards of the PCI bus and is packaged in a Eurocard. Specifications for the CompactPCI bus are developed and maintained by the PCI Industrial Computers Manufacturers Group (PICMG). cPCI buses are used extensively in systems that require high speed data transfers. Examples include data communication routers and switches, real-time machine control, real-time data acquisition, military systems, etc. PCI extensions for instrumentation (PXI) is a superset of CompactPCI that adds timing and triggering functions, imposes requirements for documenting environmental tests, and establishes a standard Windows®-based software framework. Windows is a registered trademark of the Microsoft Corporation. 
   MCA       The MCA bus, which was designed to replace the ISA bus, uses IBM's microchannel architecture (MCA). It is capable of plug-and-play because adding a card to a microchannel computer does not change the interrupt and DMA settings on the card. The MCA bus was used almost exclusively with IBM's PS/2 product line, but is now discontinued. 
   ISA / EISA       Industry standard architecture (ISA) buses can handle 16-bit data transfers at a clock speed of 8 MHz. They are also capable of handling memory under 16 MB. Extended ISA (EISA) is an enhanced version of the ISA bus. EISA buses run at 8 MHz, are capable of 32-bit data transfers, and can access all memory in the system. 
   PC/104 (PC/104Plus, EBX)       PC/104 derives its name from the acronym for personal computers (PC) and the number of pins used to connect cards (104). PC/104 cards are much smaller than ISA bus cards and stack together, eliminating the need for a motherboard, backplane, and/or card cage. PC/104-Plus combines the PCI bus with the PCI/104 form factor for faster data transfers. Embedded board expandable (EBX) is a small (5.75” x 8”) form factor for single-board computers that supports PC/104 expansion. 
   PCI       Peripheral component interconnect (PCI) is a local bus system designed for high-end computer systems. PCI buses transfer 32 or 64 bits of data at a clock speed of 33 MHz. They also support 3 to 5 critical peripherals, which are either integrated directly onto the motherboard or added via expansion cards. PCI buses fully support cards that were developed for standard I/O buses. 
   PCMCIA       PCMCIA devices or PC cards are credit card-sized peripherals used mainly in laptop and notebook computers. They plug into a 68-pin host socket that is connected either to the motherboard or an expansion bus. An adapter takes the place of a COM port and translates the PCMCIA signals into a format that is usable by the computer’s bus. PC cards adhere to standards developed by the Personal Computer Memory Card International Association (PCMCIA). Originally, these standards were designed for adding memory to portable computers; however, standards now apply to many types of devices. There are three types of PC cards: Type I, Type II, and Type III. All types have the same width (54 mm) and length (85.6 mm), but vary in thickness. 
   PMC       PMC is a form factor, not a bus. It is electrically equivalent to the PCI bus, but has a different shape and bus connectors. PMC is designed for rugged applications and provides a secure mounting platform for VME mezzanine boards. 
   PXI       PCI extensions for instrumentation (PXI) is a superset of CompactPCI that adds timing and triggering functions, imposes requirements for documenting environmental tests, and establishes a standard Windows®-based software framework. Windows is a registered trademark of the Microsoft Corporation. 
   USB       Universal serial bus (USB) is a 4-wire, 12-Mbps serial bus for low-to-medium speed peripheral device connections to personal computers (PC), including keyboards, mice, modems, printers, joysticks, audio functions, monitor controls, etc. The USB design is standardized by the USB Implementers Forum (USBIF), an organization that includes leading companies from the computer and electronics industries. The current USB specification is USB 2.0, which supports data transfer rates of up to 480 Mbps. 
   VMEbus       VMEbus is based on the VME standard, which defines mechanical specifications such as board dimensions, connector specifications and enclosure characteristics, as well as the electronic specifications for sub-bus structures, signal functions, timing, signal voltage levels, and master/slave configurations.  The VMEbus uses 3U and 6U Eurocards, rugged circuit boards that provide a 96-pin plug instead of an edge connector for durability. Several VMEbus varieties are available.  
   VXI / MXI Bus       VME extensions for instrumentation (VXI) is an electrical and mechanical standard used mainly with automatic test equipment (ATE). VXI allows equipment from different vendors to work together in a common control and packaging environment. Multisystem extension interface (MXI) is a 8MB/s bus for connection of up to 8 digital devices and expansion boards. 
   IEEE 1394 (FireWire®)       IEEE 1394 or FireWire® is an interface standard adopted by the Institute of Electrical and Electronics Engineers (IEEE) for very fast digital data transfers such as streaming video. IEEE 1394 connectors are used to transmit and receive data among FireWire devices, and are designed to replace external high-speed peripheral connections to personal computers, including hard disks, CD-ROMs, DVDs, graphics cards, high-speed scanners, direct video, monitors, etc. Tiny, robust FireWire connectors will also become important parts of home entertainment, communication, and appliance networks. FireWire is a registered trademark of Apple Computer, Inc.  
   Other       Other unlisted, specialized, or proprietary configuration. 
   Search Logic:      All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.
   Connector Type       
   Your choices are...         
   DB-9       9-pin D-type connector used for serial communication. 
   DB-25       25-pin D-type connector used for serial communication. 
   DB-37       D-shaped connector with 37 pins, commonly used in RS449 cable assemblies. 
   DB-50       D-shaped connector with 50 pins arranged in three rows. 
   Other       Other unlisted, specialized, or proprietary connector type. 
   Search Logic:      All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.
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Features
   Digital I/O Channels       Digital or discrete channels are used for low-level on-off signals used in applications such as communication, user interface, or control. 
   Search Logic:      "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice.
   Analog I/O Channels       Analog input and/or output channels are available. 
   Search Logic:      "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice.
   Agency Approvals       The computer board has been approved by any number of agencies including (but not limited to): UL, FCC, or CE. 
   Search Logic:      "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice.
   Application Software Included       The computer board includes compatible software for control or for monitoring data acquisition or signal conditioning from a supervisory or host computer. 
   Search Logic:      "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice.
   One-shot Output       The output of the counter produces only one pulse when triggered. 
   Search Logic:      "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice.
   Selectable Input Frequency       The frequency of the driving clock for the counter is variable and can be selected by the user. 
   Search Logic:      "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice.
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Environment
   Operating Temperature       This is the full required range of ambient operating temperature. 
   Search Logic:      User may specify either, both, or neither of the limits in a "From - To" range; when both are specified, matching products will cover entire range. Products returned as matches will meet all specified criteria.
   Operating Humidity       This is the full required range of ambient operating humidity. 
   Search Logic:      User may specify either, both, or neither of the limits in a "From - To" range; when both are specified, matching products will cover entire range. Products returned as matches will meet all specified criteria.
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