ATA6621 Просмотр технического описания (PDF) - Atmel Corporation
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ATA6621 Datasheet PDF : 27 Pages
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5. Electrical Characteristics (Continued)
5V < VS < 18V, Tamb = –40°C to +125°C
No. Parameters
Test Conditions
Pin Symbol Min
Typ
Max
Unit Type*
9 LIN Bus Receiver
9.1
Center of receiver
threshold
VBUS_CNT =
(Vth_dom + Vth_rec) / 2
9.2 Receiver dominant state VEN = 5V
9.3 Receiver recessive state VEN = 5V
9.4 Receiver input hysteresis VHYS = Vth_rec – Vth_dom
9.5
Wake detection LIN
High-level input voltage
VBUS_CNT 0.475 VS
0.5
VS
0.525 –
VS
V
A
VBUSdom
–27
0.4 VS
V
A
VBUSrec
0.6 VS
40
V
A
VBUShys 0.028 VS 0.1 VS 0.175 VS
V
A
VLINH
VS – 1V
VS + 0.3V V
A
9.6
Wake detection LIN
Low-level input voltage
Initializes a wake-up signal
VLINL
–27
VS – 3.3V V
A
10 Internal Timers
10.1
Dominant time for
wake-up via LIN bus
VLIN = 0V
Tbus
30
90
150
µs
A
Time delay for mode
10.2
change from Pre Normal
to Normal Mode via pin
VEN = 5V
EN
Tnorm
5
15
20
µs
A
Time delay for mode
10.3 change from Normal into VEN = 0V
Sleep Mode via pin EN
Tsleep
2
7
15
µs
A
10.4
TXD dominant time-out
timer
VTXD = 0V
Tdom
6
10
20
ms
A
10.5 Duty cycle 1
10.6 Duty cycle 2
10.7
Slope time falling and
rising edge at LIN
10.8
Time of low pulse for
wake-up via pin WAKE
THRec(max) = 0.744 × VS;
THDom(max) = 0.581 × VS;
VS = 7.0V to 18V; tBit = 50 µs
D1 = tbus_rec(min) / (2 × tBit)
THRec(min) = 0.422 × VS;
THDom(min) = 0.284 × VS;
VS = 7.0V to 18V; tBit = 50 µs
D2 = tbus_rec(max) / (2 × tBit)
Slope time dominant and
recessive edges
VWAKE = 0V
D1
0.396
A
D2
TSLOPE_fall
TSLOPE_rise
3.5
TWAKE
60
0.581
A
22.5
µs
A
130
200
µs
A
11
11.1
Internal Receiver Electrical AC Parameters of the LIN Physical Layer LIN Receiver, RXD Load Conditions (CRXD): 20 pF
Propagation delay of
receiver (Figure 5-1 on trec_pd = max(trx_pdr, trx_pdf)
page 22)
trx_pd
6
µs
A
Symmetry of receiver
11.2 propagation delay rising trx_sym = trx_pdr – trx_pdf
edge minus falling edge
trx_sym
–2
2
µs
A
*) Type means: A = 100% tested, B = 100% correlation tested, C = Characterized on samples, D = Design parameter
20 ATA6621
4887D–AUTO–12/06
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