Measurement Computing USB-1616FS - Manual (Page 26)

USB-1616FS User's Guide Specifications
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Counter
Table 10. Counter specifications
Pin name CTR
Counter type Event counter
Number of channels 1
Input type TTL, rising edge triggered
Resolution 32 bits
Counter/timer read/write rates; software paced Counter read: system dependent, 33 reads to 1000 reads per second
Counter clear: system dependent, 33 reads to 1000 writes per second
Schmidt trigger hysteresis 20 mV to 100 mV
Input leakage current ± 1 µA
Maximum input frequency 1 MHz
High pulse width 500 ns min
Low pulse width 500 ns min
Input low voltage 1.0 V min, -0.5 V max
Input high voltage 4.0 V min, 5.5 V max
Memory
Table 11. Memory specifications
Data FIFO 32,768 samples, 65,536 bytes
EEPROM 1,024 bytes
EEPROM configuration Address range Access Description
0x000-0x07F Reserved 128 bytes system data
0x080-0x1FF Read/Write 384 bytes calibration data
0x200-0x3FF Read/Write 512 bytes user area
Microcontroller
Table 12. Microcontroller specifications
Type High performance 8-bit RISC microcontroller
Program memory 16,384 words
Data memory 2,048 bytes
Power
Table 13. Power specifications
Parameter Conditions Specification
Supply current USB enumeration <100 mA
Supply current (Note 5) Continuous mode 350 mA typ
User +5V output voltage range (Note 6) Available at the 5V screw terminal 4.0 V min, 5.25 V max
User +5V output current (Note 7) Available at the 5V screw terminal 50 mA max
Note 5: The total current requirement for the USB-1616FS which includes up to 10mA for the status LEDs.
Note 6: Output voltage range assumes input power supply voltage is within specified limits
Note 7: The total amount of current that can be sourced from the 5V screw terminal for general use. This
specification includes any additional contribution due to DIO loading.