Table Of Contents

USB-8452 Specifications

Version:
    Last Modified: February 28, 2017

    This section lists specifications for the USB-8452.

    The following specifications are typical at 25 °C unless otherwise noted.

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    Note  

    Specifications are subject to change without notice.

    Digital I/O (DIO)

    Number of lines

    DIO <0..7>

    8

    Direction control

    Input or output, software selectable

    Output driver type

    Push-pull (active drive) or open-drain, software selectable

    Absolute voltage range

    -0.5 V to +5.5 V with respect to GND

    Power-on state

    Tri-state with weak (40 kΩ) pull down to GND

    I/O specifications under different logic levels

    Output Specifications
    Logic Family

    Voltage Low Level

    (VOL)

    (Full Temperature)

    Voltage High Level

    (VOH)

    (Full Temperature)

    Output Drive Strength

    (IO_MAX)

    Max (IOL = 100 uA) Min (IOH = 100 uA) Max
    1.2 V 0.2 V 1.0 V ±3 mA
    1.5 V 0.2 V 1.3 V ±6 mA
    1.8 V 0.2 V 1.6 V ±8 mA
    2.5 V 0.2 V 2.3 V ±9 mA
    3.3 V 0.2 V 3.1 V ±12 mA
    Output Impedance 70 Ω (typical)
    Input Specifications
    Logic Family Input Voltage Low (VIL) Max Input Voltage High (VIH) Min
    1.2 V 0.42 V 0.78 V
    1.5 V 0.525 V 0.975 V
    1.8 V 0.63 V 1.17 V
    2.5 V 0.7 V 1.6 V
    3.3 V 0.8 V 2 V
    Input Impedance High impedance
    Input Protection -0.5 V to +5.5 V, ±50 mA maximum

    SPI Interface

    Signal

    SPI CS <0..7>

    Output

    SPI MOSI (SDO)

    Output

    SPI MISO (SDI)

    Input

    SPI CLK (SCLK)

    Output (50 MHz max)

    SPI system clock

    100 MHz (10 ns period)

    Supported clock rates

    25 kHz, 32 kHz, 40 kHz, 50 kHz, 80 kHz, 100 kHz, 125 kHz, 160 kHz, 200 kHz, 250 kHz, 400 kHz, 500 kHz, 625 kHz, 800 kHz, 1 MHz, 1.25 MHz, 2.5 MHz, 3.125 MHz, 4 MHz, 6 MHz, 6.25 MHz, 10 MHz, 12.5 MHz, 20 MHz, 25 MHz, 33.33 MHz, 50 MHz

    Output driver type

    Push-pull (active drive)

    Absolute voltage range

    -0.5 V to +5.5 V with respect to GND

    Power-on state

    Tri-state with weak (40 kΩ) pull down to GND

    Transfer size

    4 bits to 64 bits, software selectable

    Bit ordering

    Most significant bit (msb) first

    SPI specifications under different logic levels

    Output Specifications
    Logic Family

    Voltage Low Level

    (VOL)

    (Full Temperature)

    Voltage High Level

    (VOH)

    (Full Temperature)

    Output Drive Strength

    (IO_MAX)

    Max (IOL = 100 uA) Min (IOH = 100 uA) Max
    1.2 V 0.2 V 1.0 V ±3 mA
    1.5 V 0.2 V 1.3 V ±6 mA
    1.8 V 0.2 V 1.6 V ±8 mA
    2.5 V 0.2 V 2.3 V ±9 mA
    3.3 V 0.2 V 3.1 V ±12 mA
    Output Impedance 70 Ω (typical)
    Input Specifications
    Logic Family Input Voltage Low (VIL) Max Input Voltage High (VIH) Min
    1.2 V 0.42 V 0.78 V
    1.5 V 0.525 V 0.975 V
    1.8 V 0.63 V 1.17 V
    2.5 V 0.7 V 1.6 V
    3.3 V 0.8 V 2 V
    Input Impedance High impedance
    Input Protection -0.5 V to +5.5 V, ±50 mA maximum

    SPI timing requirements

    Timing Parameter1 Min Max Unit
    tclk SCLK period 20 ns
    tclkl SCLK low time 9 ns
    tclkh SCLK high time 9 ns
    tskew MOSI output skew (with regard to SCLK edge) -2 2 ns
    t1 MISO hold time 5 ns
    t2 MISO setup time 4 ns
    1 All timing parameters are measured/required at IDC connector.

    SPI timing diagram

    I2C Interface

    Signals

    SDA

    Output/input

    SCL

    Output/input

    Supported clock rates (Master Mode)

    I2C Standard Mode

    16 kHz, 20 kHz, 25 kHz, 31 kHz, 40 kHz, 50 kHz, 62 kHz, 80 kHz, 100 kHz

    I2C Fast Mode

    125 kHz, 200 kHz, 250 kHz, 400 kHz

    I2C Fast Mode Plus

    500 kHz, 1 MHz

    I2C High Speed Mode

    1.11 MHz, 1.33 MHz, 2.22 MHz, 3.33 MHz

    Supported clock rates (Slave Mode)

    Up to 3.4 MHz[1]

    Output driver type

    Open-drain

    Absolute voltage range

    -0.5 V to +5.5 V with respect to GND

    Absolute input current

    40 mA max

    Power-on state

    High impedance without pull-up

    I2C I/O specifications under different logic levels

    Logic Family Output Voltage Low (VOL) Max Input Voltage Low (VIL) Max
    1.2 V 0.2 V 0.4 V
    1.5 V 0.2 V 0.4 V
    1.8 V 0.2 V 0.4 V
    2.5 V 0.2 V 0.4 V
    3.3 V 0.2 V 0.4 V
    Pull-up current 3 mA (max)1
    Onboard capacitance 70 pF (max)
    Input protection 40 mA (max)
    1 With onboard pull-up resistors enabled (tested under VOL = 0.24 V)
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    Note  

    This interface is compatible with both I2C and SMBus devices. (SMBus compatibility is only under Vref= 3.3 V and using external pull-up resistors instead of onboard pull-ups. For a proper pull-up value, refer to the SMBus specifications.)

    Bus Interface

    USB specification

    USB 2.0 High-Speed (480 Mb/s)

    Power Requirements

    USB high-power bus-powered device

    Input voltage

    4.5 V min, 5.25 V max

    Working mode current

    500 mA maximum, 250 mA typical

    USB Suspend

    2.5 mA maximum (all front I/O lines disconnected)

    Output Voltage Sources

    +5 V output

    Voltage

    4.75 V min, 5.25 V max

    Current

    20 mA max

    Vref I/O reference output

    Voltage

    1.2 V, 1.5 V, 1.8 V, 2.5 V, 3.3 V, with ±10% tolerance, software selectable

    Current

    20 mA max

    Physical Characteristics

    USB-8452

    Dimensions

    7.26 cm × 9.19 cm × 2.03 cm (2.86 in. × 3.62 in. × 0.8 in.)

    I/O connectors

    1 × right angle USB series B receptacle, 1 × right angle male IDE cable receptacle

    Weight

    79 g (2.8 oz)

    USB-8452 OEM

    Dimensions

    6.65 cm × 8.86 cm (2.62 in. × 3.49 in.)

    I/O connectors

    1 × right angle USB series B receptacle, 1 × right angle male IDE cable receptacle

    Weight

    35 g (1.23 oz)

    Dimensional drawings

    Figure 1. USB-8452 OEM Dimensions (Top View)
    Figure 2. USB-8452 OEM Dimensions (Front and Rear Views)

    Safety

    Safety Standards

    This product is designed to meet the requirements of the following standards of safety for information technology equipment:
    • IEC 61010-1, EN 61010-1
    • UL 61010-1, CSA 61010-1
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    Note  

    For UL and other safety certifications, refer to the product label or the Online Product Certification section.

    Hazardous Locations

    The NI USB-845x modules are not certified for use in hazardous locations.

    Electromagnetic Compatibility

    USB-8452

    This product meets the requirements of the following EMC standards for electrical equipment for measurement, control, and laboratory use:

    • EN 61326 (IEC 61326): Class A emissions; Basic immunity
    • EN 55011 (CISPR 11): Group 1, Class A emissions
    • AS/NZS CISPR 11: Group 1, Class A emissions
    • FCC 47 CFR Part 15B: Class A emissions
    • ICES-001: Class A emissions

    USB-8452 OEM

    The USB-8452 OEM device is intended for use as part of a system. To ensure that your system meets the appropriate EMC standards, you must test the entire system.

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    Note  

    For EMC declarations and certifications, and additional information, refer to the Online Product Certification section.

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    Note  

    For EMC compliance, operate this product according to the documentation.

    CE Compliance

    USB-8452

    This product meets the essential requirements of applicable European Directives, as follows:

    • 2014/35/EU; Low-Voltage Directive (safety)
    • 2014/30/EU; Electromagnetic Compatibility Directive (EMC)

    USB-8452 OEM

    The USB-8452 OEM device is intended for use as part of a system. To ensure that your system meets the appropriate CE Compliance regulations, you must test the entire system.

    Online Product Certification

    Refer to the product Declaration of Conformity (DoC) for additional regulatory compliance information. To obtain product certifications and the DoC for this product, visit ni.com/certification, search by model number or product line, and click the appropriate link in the Certification column.

    Environmental

    The NI USB-845x modules are intended for indoor use only.

    Operating temperature (IEC 60068-2-1 and IEC 60068-2-2)

    0 °C to 45 °C

    Operating humidity (IEC 60068-2-56)

    10% to 90% RH, noncondensing

    Maximum altitude

    2,000 m (at 25 °C ambient temperature)

    Storage temperature (IEC 60068-2-1 and IEC 60068-2-2)

    -40 °C to 85 °C

    Storage humidity (IEC 60068-2-56)

    5% to 90% RH, noncondensing

    Pollution Degree (IEC 60664)

    2

    Environmental Management

    NI is committed to designing and manufacturing products in an environmentally responsible manner. NI recognizes that eliminating certain hazardous substances from our products is beneficial to the environment and to NI customers.

    For additional environmental information, refer to the Minimize Our Environmental Impact web page at ni.com/environment. This page contains the environmental regulations and directives with which NI complies, as well as other environmental information not included in this document.

    Waste Electrical and Electronic Equipment (WEEE)

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    EU Customers  

    At the end of the product life cycle, all NI products must be disposed of according to local laws and regulations. For more information about how to recycle NI products in your region, visit ni.com/environment/weee.

    电子信息产品污染控制管理办法(中国RoHS)

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    中国客户  

    National Instruments符合中国电子信息产品中限制使用某些有害物质指令(RoHS)。关于National Instruments中国RoHS合规性信息,请登录 ni.com/environment/rohs_china。(For information about China RoHS compliance, go to ni.com/environment/rohs_china.)

    371746E-01

    • 1 To support Slave Mode under logic standards below 2.5 V, the master device should meet 70 ns setup time between SDA and SCL.

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