Measurement-computing CIO-CTR05 Uživatelský manuál stáhnout pdf (Strana 14)

Chapter 3

Specifications

All specifications are subject to change without notice.

Typical for 25 °C unless otherwise specified.

Specifications in italic text are guaranteed by design.

Counter

Refer to the CTS9513-2 data sheet for complete 9513 specifications and operating modes. The data sheet is

available on our web site at www.mccdaq.com/PDFmanuals/9513A.pdf.

Table 1. Counter specifications

Parameter

Conditions

Counter type

9513

Configuration

One 9513 device. Five up/down counters, 16-bits each.

Clock input frequency

7 MHz max

X2 clock input source

1 MHz (10 MHz Xtal divided by 10)

High pulse width (clock input)

70 ns min

Cycle time (clock input)

145 ns min

Gate pulse duration

145 ns min

Input low voltage

–0.5 V min, 0.8 V max

Input high voltage

2.2 V min, 5 V max

Output low voltage

0.4 V max @ 3.2 mA

Output high voltage

2.4 V min @ –200 µA

Crystal oscillator frequency

10 MHz

Frequency accuracy

100 ppm

Interrupts

Table 2. Interrupt specifications

Number of interrupts

2 to 7, jumper selectable

Interrupt enable

External, enabled with TTL low level

Interrupt sources

External

Digital input / output

Table 3. Digital I/O specifications

Digital type

Output: 74ACT273

Input: 74LS373

Configuration

1 bank of 8 as output, 1 bank of 8 as strobed input

Number of I/O

8 input, 8 output

Output high

2.7 volts min @ –0.4 mA

Output low

0.5 volts max @ 8 mA

Input high

2.0 volts min, 7 volts absolute max

Input low

0.8 volts max, –0.5 volts absolute min

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