HCS473-SLROM datasheet(56/68 Pages) MICROCHIP

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HCS473

DS40035C-page 54

Preliminary

 2002 Microchip Technology Inc.

TABLE 7-5:

AC CHARACTERISTICS, Industrial Temperature Devices(4)

AC Characteristics

Tamb = -20°C to 85°C, 2.05V < V

≤ 3.5V unless stated otherwise

OSC = 4 MHz ±10%

Symbol

Min

Typ(1)

Max

Description

General HCS473 Timing

9 ms

10 ms

11 ms

12 ms

Debounce Time

3.5V < V

DD < 5.5V(4)

QUE

1.8s

2.2s

2.4s

Que Window

3.5V < V

DD < 5.5V(4)

9.81 ms

10.9 ms

12 ms

13.08 ms

Power-up Delay Time (includes button debounce)

3.5V < V

DD < 5.5V(4)

PLL

17.1 ms

19 ms

20.9 ms

22.8 ms

Encoder Mode PLL activation to first code word

3.5V < V

DD < 5.5V(4)

LEDON

90 ms

100 ms

110 ms

120 ms

LED ON Time

3.5V < V

DD < 5.5V(4)

LEDOFF

450 ms

500 ms

550 ms

600 ms

LED OFF Time

3.5V < V

DD < 5.5V(4)

Communication from Transponder Reader to HCS473

CMD

1.1 LF

TE+100

µs

1.2 LF

TE+100

µs

—

9.18 ms

3.5V < V

DD < 5.5V(4)

TSCMD

1.1 LF

TE+100

µs

1.2 LF

TE+100

µs

—

9.18 ms

Delay from Transponder Select ACK to next command

3.5V < V

DD < 5.5V(4)

FINH

100

µs1LFTE

—

Time to leave LF on after last data bit’s rising edge

Response from HCS473 to Transponder Reader

1ms+.9LF

3.5 ms+1 LF

10 ms+1.1 LF

10 ms+1.2 LF

Delay to wake-up ACK(4)

TSACK

.9 LF

TE+14

µs

.9 LF

TE+14

µs

1LF

TE+30

µs

1LF

TE+30

µs

1.1 LF

TE+49

µs

1.2 LF

TE+53

µs

Delay from TID pulse rising edge to TID Acknowledge

TID = 0

3.5V < V

DD < 5.5V(4)

.9 LF

TE-10

µs

.9 LF

TE-10

µs

1 LF

1.1 LF

TE+12

µs

1.2 LF

TE+13.2

µs

TID > 0

3.5V < V

DD < 5.5V(4)

TPACK

141

µs

141

µs

179

µs

179

µs

234

µs

255

µs

Delay to Transport Code Acknowledge

3.5V < V

DD < 5.5V(4)

WRT

—

4 ms

10 ms

Delay to Write Acknowledge

AOACK

µs

135

µs

147

µs

Delay to anticollision off Acknowledge

3.5V < V

DD < 5.5V(4)

IFF

5.07 ms

5.64 ms

6.2 ms

6.8 ms

Delay to IFF response - RF or LF response

3.5V < V

DD < 5.5V(4)

READ

184

µs

184

µs

227

µs

227

µs

286

µs

312

µs

Delay to read response - RF or LF response

3.5V < V

DD < 5.5V(4)

HOP

17.1 ms

19 ms

20.9 ms

22.8 ms

Delay to hopping code response - RF or LF response

3.5V < V

DD < 5.5V(4)

DAMP

1.08 LF

1.2 LF

1.32 LF

1.44 LF

Delay from detecting LC rising edge to first damp pulse

3.5V < V

DD < 5.5V(4)

DEMOD

14.76 ms

16.4 ms

18 ms

19.7 ms

Demodulator mode window looking for edge on LC pin

3.5V < V

DD < 5.5V(4)

Timing Element T

180

360

720

100

200

400

800

110

220

440

880

RFT

E or LFTE

RFBSL = LFBSL = 002

RFBSL = LFBSL = 012

RFBSL = LFBSL = 102

RFBSL = LFBSL = 112

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