Digital I/O - TTL/CMOS

 

Digital I/O - TTL/CMOS

NAI's Smart Function Modules provide uniquely flexible, mix & match customization options for use with our COTS hardware. Learn More

NAI’s latest generation TTL/CMOS Modules are offered in two versions: TL1, our Standard Functionality (SF) module with variants TL3, TL5, and TL7, and TL2, our Enhanced Functionality SF module with variants TL4, TL6, and TL8. TL1 and its variants provide basic transceiver operation for 24 channels that are individually programmable for either input or output. It also includes continuous Background Built-in-Test (BIT) and programmable debounce circuitry with selectable time delay to eliminate false signals resulting from relay contact bounce. TL2 and its variants provide all of the features of the SF modules and, in addition, provides the features listed below.

Each of the TTL modules are used on our Multifunction Embedded I/O Boards, Rugged Systems, and Single Board Computers (SBCs) offered in OpenVPX, cPCI, VME, and PCI/PCIe configurations.

Modules TL1 and TL2

Function modules TL1, TL2 and their variants provide 24 channels of TTL/CMOS transceiver functionality as either inputs or outputs. The transistor-transistor logic (TTL) employs transmitters with multiple emitters in gates having more than one input. TTL offers high switching speed and relative immunity to noisy systems. CMOS sensors provide image sensing technology by converting light waves into signals that are small bursts of current. These waves can be light or other electromagnetic radiation.

When programmed as inputs, status and/or interrupts can be enabled for each channel to indicate either transition on rising edge or transition on falling edge, as well as current state. Debounce circuits for each channel offer a selectable time delay. This eliminates false signals resulting from contact bounce commonly experienced with mechanical relays and switches. Each TTL/CMOS channel has an internal 100 kohm pull-down resistor. All inputs are continually scanned.

When programmed as outputs, the channels can be programmed to output the commanded state from either an internally generated 3.3 V power supply, or from an externally provided VCC supply (up to 5.5 V max).

Continuous Background Built-in-Test (BIT) status provides real-time channel health for mission-critical systems. This feature runs in the background and is transparent in normal operations. When the channels are programmed as inputs, a redundant, read-back circuit continually scans each channel to verify the input. When the channels are programmed as outputs, the readback circuit is compared with the commanded output logic.

Enhanced Functionality Modules TL2 and Variants TL4, TL6, and TL8 Features

  • 24 channels available as inputs or outputs
  • Pulse Width Modulation (PWM) output mode
  • Pattern Generator output mode
  • Timing measurement of inputs with 8 ns resolution
  • Synchronous Triggering with Preload Mode that provides a master trigger channel to control the other 23 channels. May be set up to control additional modules.
  • Programmable debounce circuitry with selectable time delay eliminates false signals resulting from relay contact bounce
  • Transceiver Mode provides simultaneous input/output switching of multiple channels in a single operation
  • Built-in test runs in background constantly monitoring system health for each channel

Digital I/O - TTL/CMOS Strapping Options

Standard Functionality Module TL1 and Variants
Module and Variants Type Default Power-on/ Description
TL1 TTL I/O
  1. Internal VCC
  2. Input with 100k pull-downs
TL3 TTL with: EXT-VCC strapped to Internal +5 V
  1. Internal VCC
  2. Input with 100k pull-downs
TL5 TTL with: Input pull-ups
  1. Internal VCC
  2. Input with 100k pull-ups
TL7 TTL with: Input pull-ups and EXT-VCC strapped to Internal +5 V
  1. Internal VCC
  2. Input with 100k pull-ups
Enhanced Functionality Module TL2 and Variants
Module and Variants Type Default Power-on/ Description
TL2 TTL I/O
  1. Internal VCC
  2. Input with 100k pull-downs
TL4 TTL with: EXT-VCC strapped to Internal +5 V
  1. Internal VCC
  2. Input with 100k pull-downs
TL6 TTL with: Input pull-ups
  1. Internal VCC
  2. Input with 100k pull-ups
TL8 TTL with: Input pull-ups and EXT-VCC strapped to Internal +5 V
  1. Internal VCC
  2. Input with 100k pull-ups

 

Click below for manuals and specifications:


ModuleDescriptionManual
TL1Serial, CDI Repeat-Back, TTL level data streamModule Manual - TL1
TL2Enhanced Serial, CDI Repeat-Back, TTL level data streamModule Manual - TL2

Function module(s) featured in products below:


ModelBoard TypeBoard ArchitectureFunction Module SlotsEthernetMaster / SlaveOn Board ReferenceOther
75G53U cPCIARM / Xilinx® Zynq32 x GbBoth   
64G5VMEARM / Xilinx® Zynq62 x GbBoth YUser application ARM processor capability
68G53U OpenVPXDual Core ARM® Cortex® A9 @ 800 MHz32 x GbBoth  Slot profile: SLT3-PER-1F-14.3.2 / Module profile: MOD3-PER-1F-16.3.2-2
ModelBoard TypeProcessorFunction Module SlotsMaximum MemoryMaximum StorageVideo OptionsEthernetAvailable O/S
75ARM13U cPCI SBCXilinx® Zynq 7015 with Dual Core ARM® Cortex® A9 @ 800 MHz3512 MB DDR3L SDRAM32 GB SATAII NAND FlashN/A2 x GbWind River® VxWorks®, Xilinx® PetaLinux OS and DDC-I Deos™ support
75PPC13U cPCI SBCNXP® QorIQ® P2041 Quad-Core e500mc Processor @ 1.2 GHz28 GB DDR3L SDRAM32 GB SATAII NAND FlashN/A2 x GbWind River® VxWorks®
75INT23U cPCI SBCDual Core Intel® i7 3517UE @ 1.5 GHz28 GB DDR3L SDRAM32 GB SATAII NAND FlashVGA, HDMI, LVDS, or DVI2 x GbCentOS, Red Hat®, Linux®, and Windows® Embedded Standard 7
64ARM16U VME SBCXilinx® Zynq Dual Core ARM® Cortex® A9 @ 800 MHz6 + AC Ref512 MB DDR3L SDRAM32 GB SATAII NAND FlashN/A2 x GbWind River® VxWorks® and Xilinx® PetaLinux OS support
68PPC23U OpenVPX SBCNXP® QorIQ® T2080 Quad Core @1.5 GHz2 8 GB DDR3 SDRAM32 GB SATAII NAND FlashN/A2 x GbWind River® VxWorks®
ModelPhotoBoard TypeDimensions w/Connectors (w x h x d)Volume w/Connectors (in3)Weight / lbs (fully populated)Est. Typ. Power Dissipation (W)# of Board SlotsFunction Module SlotsMax I/O PinsEthernet
NIU1AModule6.8" x 1.5" x 2.5"28.90<1.25 to 15 WN/A1592 x Gb
SIU313U4.71" x 2.35" x 8.71"96.41<5.07 to 35 W131322 x Gb
SIU333U4.71" x 4.78" x 8.71"196.10<10.014 to 75 W393222 x Gb
SIU353U7.13" x 4.78" x 8.71"296.85<15.025 to 100 W5155122 x Gb