ST7538Q datasheet(10/44 Pages) STMICROELECTRONICS

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Electrical characteristics

ST7538Q

10/44

Digital I/O 5V digital supply

VIH

High Logic Level Input

Voltage

VIL

Low Logic Level input

Voltage

1.2

VOH

High Logic Level Output

Voltage

IOH= -2mA

DVdd -0.75

VOL

Low Logic Level Output

Voltage

IOL= 2mA

DVss + 0.3

Digital I/O 3.3V digital supply

VIH

High Logic Level Input

Voltage

1.4

VIL

Low Logic Level input

Voltage

0.8

VOH

High Logic Level Output

Voltage

IOH= -2mA

DVdd -0.75

VOL

Low Logic Level Output

Voltage

IOL= 2mA

DVss + 0.4

Oscillator

XINSWING

XIN Input Voltage swing

External Clock. Figure 19

XINOFFSET

XIN Input Voltage offset

External Clock. Figure 19

2.5

XTAL Clock Duty Cycle

External Clock. Figure 19

Xtal

Crystal Oscillator

frequency

Fundamental

MHz

Tclock

Oscillator Period (1/Xtal)

62.5

XtalESR

External Oscillator Esr

Resistance

Ω

XtalCL

External Oscillator

Stabilization Capacitance

Transmitter

IATO

Output Transmitting

Current on ATO

1mArms

VATO

Max Carrier Output AC

Voltage

RCL = 1.75kΩ

Vsense(AC) = 0V

1.75

2.3

3.5

VPP

VATODC

Output DC Voltage on ATO

1.7

2.1

2.5

Table 4. Electrical characteristics (continued)

(AVdd = DVdd = +5V, PAVcc =+9 V, PAVss, SGND = DVss = 0V, -40°C

≤TA ≤ 85°C, TJ < 125 °C, fc = 86kHz,

other control register parameters as default value, unless otherwise specified)

Symbol

Parameter

Test condition

Min

Typ

Max

Unit

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