HCS473_13 datasheet(54/68 Pages) MICROCHIP

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HCS473

DS40035D-page 54

Preliminary

 2000-2013 Microchip Technology Inc.

TABLE 7-5:

AC CHARACTERISTICS, Industrial Temperature Devices

(4)

AC Characteristics

Tamb = -20°C to 85°C, 2.05V < VDD

 3.5V unless stated otherwise

FOSC = 4 MHz ±10%

Symbol

Min

Typ(1)

Max

Description

General HCS473 Timing

TDB

9 ms

10 ms

11 ms

12 ms

Debounce Time

3.5V < VDD < 5.5V(4)

TQUE

1.8s

2.2s

2.4s

Que Window

3.5V < VDD < 5.5V(4)

TPU

9.81 ms

10.9 ms

12 ms

13.08 ms

Power-up Delay Time (includes button debounce)

3.5V < VDD < 5.5V(4)

TPLL

17.1 ms

19 ms

20.9 ms

22.8 ms

Encoder Mode PLL activation to first code word

3.5V < VDD < 5.5V(4)

TLEDON

90 ms

100 ms

110 ms

120 ms

LED ON Time

3.5V < VDD < 5.5V(4)

TLEDOFF

450 ms

500 ms

550 ms

600 ms

LED OFF Time

3.5V < VDD < 5.5V(4)

Communication from Transponder Reader to HCS473

TCMD

1.1 LFTE+100

s

1.2 LFTE+100

s

—

9.18 ms

3.5V < VDD < 5.5V(4)

TTSCMD

1.1 LFTE+100

s

1.2 LFTE+100

s

—

9.18 ms

Delay from Transponder Select ACK to next command

3.5V < VDD < 5.5V(4)

TFINH

100

s1LFTE

—

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

Response from HCS473 to Transponder Reader

TSF

1 ms+.9 LFTE

3.5 ms+1 LFTE

10 ms+1.1 LFTE

10 ms+1.2 LFTE

Delay to wake-up ACK(4)

TTSACK

.9 LFTE+14

s

.9 LFTE+14

s

1 LFTE+30

s

1 LFTE+30

s

1.1 LFTE+49

s

1.2 LFTE+53

s

Delay from TID pulse rising edge to TID Acknowledge

TID = 0

3.5V < VDD < 5.5V(4)

.9 LFTE-10

s

.9 LFTE-10

s

1 LFTE

1.1 LFTE+12

s

1.2 LFTE+13.2

s

TID > 0

3.5V < VDD < 5.5V(4)

TTPACK

141

s

141

s

179

s

179

s

234

s

255

s

Delay to Transport Code Acknowledge

3.5V < VDD < 5.5V(4)

TWRT

—

4 ms

10 ms

Delay to Write Acknowledge

TAOACK

s

135

s

147

s

Delay to anticollision off Acknowledge

3.5V < VDD < 5.5V(4)

TIFF

5.07 ms

5.64 ms

6.2 ms

6.8 ms

Delay to IFF response - RF or LF response

3.5V < VDD < 5.5V(4)

TREAD

184

s

184

s

227

s

227

s

286

s

312

s

Delay to read response - RF or LF response

3.5V < VDD < 5.5V(4)

THOP

17.1 ms

19 ms

20.9 ms

22.8 ms

Delay to hopping code response - RF or LF response

3.5V < VDD < 5.5V(4)

TDAMP

1.08 LFTE

1.2 LFTE

1.32 LFTE

1.44 LFTE

Delay from detecting LC rising edge to first damp pulse

3.5V < VDD < 5.5V(4)

TDEMOD

14.76 ms

16.4 ms

18 ms

19.7 ms

Demodulator mode window looking for edge on LC pin

3.5V < VDD < 5.5V(4)

Timing Element TE

180

360

720

100

200

400

800

110

220

440

880

RFTE or LFTE

RFBSL = LFBSL = 002

RFBSL = LFBSL = 012

RFBSL = LFBSL = 102

RFBSL = LFBSL = 112

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