mc33789 Freescale Semiconductor, Inc, mc33789 Datasheet - Page 20

• Manufacturer Part Number: mc33789
• Description: Airbag System Basis Chip Sbc With Power Supply And Psi5 Sensor Interface
• Manufacturer: Freescale Semiconductor, Inc

ELECTRICAL CHARACTERISTICS
DYNAMIC ELECTRICAL CHARACTERISTICS
Table 5. Dynamic Electrical Characteristics
Typical values noted reflect the approximate parameter means at T
20
LIN PHYSICAL LAYER: DRIVER CHARACTERISTICS FOR NORMAL SLEW RATE - 20.0 KBIT/SEC ACCORDING TO THE LIN PHYSICAL
LAYER SPECIFICATION
LIN PHYSICAL LAYER: DRIVER CHARACTERISTICS FOR SLOW SLEW RATE - 10.4 KBIT/SEC ACCORDING TO LIN PHYSICAL LAYER
SPECIFICATION
TXD TIMING
Notes
33789
Duty Cycle 1:
Duty Cycle 2:
Duty Cycle 3:
Duty Cycle 4:
LIN PHYSICAL LAYER: RECEIVER CHARACTERISTICS
Propagation Delay and Symmetry
TXD Permanent Dominant State Delay
16.
17.
18.
19.
20.
21.
Characteristics noted under conditions 7.0 V ≤ V
TH
TH
D1 = t
TH
TH
D2 = t
TH
TH
D3 = t
TH
TH
D4 = t
Propagation Delay of Receiver, t
Symmetry of Receiver Propagation Delay, t
REC(MAX)
DOM(MAX)
REC(MIN)
DOM(MIN)
REC(MAX)
DOM(MAX)
REC(MIN)
DOM(MIN)
Bus load R
threshold defined at each parameter. See
the GND and GND_LIN VLIN pins, in order to be consistent with LIN Protocol Specification, and other Freescale LIN product
specifications.
See
See
V
signal to LIN signal threshold defined at each parameter. See
See
The LIN is in Recessive state and the receiver is still active.
SUP
BUS_REC(MIN)
BUS_REC(MAX)
BUS_REC(MIN)
BUS_REC(MAX)
Figure
Figure
Figure
from 7.0 to 18 V, bus load R
= 0.422 * V
= 0.389 * V
= 0.284 * V
= 0.251 * V
= 0.744 * V
= 0.778 * V
= 0.581 * V
= 0.616 * V
(16),
BUS
10.
11.
12.
(18)
and C
/(2 x t
/(2 x t
/(2 x t
/(2 x t
(16),
SUP
SUP
SUP
SUP
SUP
SUP
SUP
SUP
BIT
BIT
BUS
BIT
BIT
(17)
Characteristic
), t
), t
), t
), t
1.0 nF / 1.0 kΩ, 6.8 nF / 660 Ω, 10 nF / 500 Ω. Measurement thresholds: 50% of TXD signal to LIN signal
BIT
BIT
BIT
BIT
(20)
REC_PD
= 50 µs, 7.0 V
= 96 µs, 7.0 V
= 50 µs, 7.6 V
= 96 µs, 7.6 V
(21)
BUS
= MAX (t
and C
REC_PDF
Figure
BUS
≤
≤
≤
≤
REC_PDR
V
V
V
V
SUP
SUP
1.0 nF / 1.0 kΩ, 6.8 nF / 660 Ω, 10 nF / 500 Ω. Measurement thresholds: 50% of TXD
- t
SUP
SUP
9. In
SUP
REC_PDR
≤
≤
(19)
≤
≤
(15)
Figure
, t
18 V
18 V
18 V
18 V
REC_PDF
≤ 18 V, - 40 °C ≤ T
9, use VSUP to represent the VPWR pin, and use GND to represent both
Figure
)
A =
9.
25°C under nominal conditions unless otherwise noted.
t
t
t
Symbol
REC_SYM
TXDDOM
REC_PD
D1
D2
D3
D4
A
≤ 125 °C, GND = 0 V unless otherwise noted.
39.6
41.7
3.75
- 2.0
Min
—
—
—
Analog Integrated Circuit Device Data
Typ
5.0
—
—
—
—
—
—
Freescale Semiconductor
Max
58.1
6.25
6.0
2.0
59
—
—
Unit
ms
μs
%
%
%
%