USB-8452 Specifications

This section lists specifications for the USB-8452.

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

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

1378

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)
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)

1378

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

1378

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
Note For UL and other safety certifications, refer to the product label or the Product Certifications and Declarations 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.

Note For EMC declarations and certifications, and additional information, refer to the Online Product Certification section.
Note For EMC compliance, operate this product according to the documentation.

CE Compliance 1378

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.

Product Certifications and Declarations

Refer to the product Declaration of Conformity (DoC) for additional regulatory compliance information. To obtain product certifications and the DoC for NI products, visit ni.com/product-certifications, search by model number, and click the appropriate link.

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 Engineering a Healthy Planet 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.

EU and UK Customers

  • 1378 Waste Electrical and Electronic Equipment (WEEE)—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）

  • 1378 中国RoHS— NI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NI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.