Datasheet

MCP2551
DS21667E-page 12 © 2007 Microchip Technology Inc.
2.3 AC Characteristics
AC Specifications
Electrical Characteristics:
Industrial (I): TAMB = -40°C to +85°C VDD = 4.5V to 5.5V
Extended (E): T
AMB = -40°C to +125°C VDD = 4.5V to 5.5V
Param
No.
Sym Characteristic Min Max Units Conditions
1t
BIT Bit time 1 62.5 µs VRS = 0V
2fBIT Bit frequency 16 1000 kHz VRS = 0V
3 TtxL2bus(d) Delay TXD to bus active — 70 ns -40°C ≤ TAMB ≤ +125°C,
V
RS = 0V
4 TtxH2bus(r) Delay TXD to bus inactive — 125 ns -40°C ≤ TAMB ≤ +85°C,
V
RS = 0V
— 170 ns -40°C ≤ T
AMB ≤ +125°C,
V
RS = 0V
5 TtxL2rx(d) Delay TXD to receive active — 130 ns -40°C ≤ TAMB ≤ +125°C,
V
RS = 0V
— 250 ns -40°C ≤ T
AMB ≤ +125°C,
R
S = 47 kΩ
6 TtxH2rx(r) Delay TXD to receiver
inactive
— 175 ns -40°C ≤ T
AMB ≤ +85°C,
V
RS = 0V
— 225 ns -40°C ≤ TAMB ≤ +85°C,
R
S = 47 kΩ
— 235 ns -40°C ≤ TAMB ≤ +125°C,
V
RS = 0V
— 400 ns -40°C ≤ T
AMB ≤ +125°C,
R
S = 47 kΩ
7 SR CANH, CANL slew rate 5.5 8.5 V/µs Refer to Figure 1-1;
R
S = 47 kΩ, (Note 1)
10 tWAKE Wake-up time from standby
(Rs pin)
— 5 µs see Figure 2-5
11 TbusD2rx(s) Bus dominant to RXD Low
(Standby mode)
— 550 ns V
RS = +4V; (see Figure 2-2)
12 C
IN(CANH)
C
IN(CANL)
CANH; CANL input
capacitance
—20
(typical)
pF 1 Mbit/s data rate;
VTXD = VDD, (Note 1)
13 CDIFF Differential input
capacitance
—10
(typical)
pF 1 Mbit/s data rate
(Note 1)
14 TtxL2busZ TX Permanent Dominant
Timer Disable Time
1.25 4 ms
15 TtxR2pdt(res) TX Permanent Dominant
Timer Reset Time
— 1 µs Rising edge on TXD while
device is in permanent
dominant state
Note 1: This parameter is periodically sampled and not 100% tested.