MLX90121

13.56MHz RFID Transceiver

3901090121

Page 5 of 26

Data Sheet

Rev. 007

Jan-2008

Serial link and digital I/O

Output current drive

≤ 0.4 Volt

4

mA

Output voltage low

0

0.2

0.4

V

Output voltage high

4.6

4.8

5

V

Input voltage high

Input voltage low

-0.3

CK pulse

“0” level pulse or “1” level pulse

500

ns

General setup time

60

ns

General hold time

60

ns

Pulse time between successive

registers writing

5

s

Crystal Oscillator

Frequency range

ISO compliant applications

13.56

MHz

Start-up time

2

5

ms

Xtal series resistance

50

100

Ω

External clock signal

specifications

see note 3

Min sine wave amplitude, AC

coupled

Input on pin XTAL2

1

Min sine wave amplitude, DC

coupled

Input on pin XTAL2

Input has to be centered around

Vdd/2

1

XBUF output specifications

XBUF Low Level (Col)

1K load resistor

0.1

V

XBUF High Level (Coh)

1K load resistor

4.8

V

Rise and fall times (10%-90%)

1K load resistor//12pF

3

ns

Notes

1.

Parameter measured using recommended output matching network.

2.

This parameter is measured using a base band signal for all specified modulation modes. The

measurement is made at the DOUT output with the input diode detector bypassed.

3.

The external clock symmetry is of paramount importance. It has a direct influence on the transmitter

output power. When using a sine wave as external clock input, it must not show visible distortion. In

case a square wave is used, its duty cycle has to be equal to 50%.