Datasheet

 2010-2013 Microchip Technology Inc. DS20002230E-page 15
MCP2003/4/3A/4A
2.4 AC Specifications
AC CHARACTERISTICS
V
BB = 6.0V to 27.0V; TA = -40°C to +125°C
Parameter Sym Min. Typ. Max. Units Test Conditions
Bus Interface – Constant Slope Time Parameters
Slope Rising and Falling Edges t
SLOPE 3.5 — 22.5 µs 7.3V <= VBB <= 18V
Propagation Delay of
Transmitter
tTRANSPD —— 4.0µstTRANSPD = max (tTRANSPDR or
t
TRANSPDF)
Propagation Delay of Receiver t
RECPD —— 6.0µstRECPD = max (tRECPDR or tRECPDF)
Symmetry of Propagation
Delay of Receiver Rising Edge
w.r.t. Falling Edge
tRECSYM -2.0 — 2.0 µs tRECSYM = max (tRECPDF – tRECPDR)
R
RXD 2.4 TO VCC, CRXD 20 PF
Symmetry of Propagation
Delay of Transmitter Rising
Edge w.r.t. Falling Edge
t
TRANS-
SYM
-2.0 — 2.0 µs tTRANSSYM = max (tTRANSPDF -
t
TRANSPDR)
Time to Sample of FAULT/TXE
for Bus Conflict Reporting
t
FAULT ——32.5µstFAULT = max (tTRANSPD + tSLOPE +
t
RECPD)
Duty Cycle 1 @20.0 kbit/sec .396 — — C
BUS; RBUS conditions:
1nF; 1k | 6.8 nF; 660 | 10 nF; 500
TH
REC(MAX) = 0.744 x VBB,
TH
DOM(MAX) = 0.581 x VBB,
V
BB =7.0V – 18V; tBIT = 50 µs
D1 = t
BUS_REC(MIN)/2 x tBIT)
Duty Cycle 2 @20.0 kbit/sec — — .581 C
BUS; RBUS conditions:
1nF; 1k | 6.8 nF; 660 | 10 nF; 500
TH
REC(MAX) = 0.284 x VBB,
TH
DOM(MAX) = 0.422 x VBB,
V
BB =7.6V – 18V; tBIT = 50 µs
D2 = t
BUS_REC(MAX)/2 x tBIT)
Duty Cycle 3 @10.4 kbit/sec .417 — — C
BUS; RBUS conditions:
1nF; 1k | 6.8 nF; 660 | 10 nF; 500
TH
REC(MAX) = 0.778 x VBB,
TH
DOM(MAX) = 0.616 x VBB,
V
BB =7.0V – 18V; tBIT = 96 µs
D3 = t
BUS_REC(MIN)/2 x tBIT)
Duty Cycle 4 @10.4 kbit/sec — — .590 C
BUS; RBUS conditions:
1nF; 1k | 6.8 nF; 660 | 10 nF; 500
TH
REC(max) = 0.251 x VBB,
TH
DOM(MAX) = 0.389 x VBB,
V
BB =7.6V – 18V; tBIT = 96 µs
D4 = t
BUS_REC(MAX)/2 x tBIT)
Wake-up Timing
Bus Activity Debounce time t
BDB 5 20 µs MCP2003/2004
30 70 125 µs MCP2003A/2004A
Bus Activity to V
REN on tBACTVE 35 150 µs MCP2003/2004
10 30 90 µs MCP2003A/2004A
WAKE to V
REN on tWAKE
150 µs
Chip Select to VREN on
t
CSOR —150µs
V
REN floating
Chip Select to V
REN off tCSPD —80µsVREN floating