908E626 Datasheet, PDF (10/38 Pages) Freescale Semiconductor, Inc – Integrated Stepper Motor Driver with Embedded MCU and LIN Serial Communication

DYNAMIC ELECTRICAL CHARACTERISTICS
DYNAMIC ELECTRICAL CHARACTERISTICS
DYNAMIC ELECTRICAL CHARACTERISTICS
All characteristics are for the analog chip only. Please refer to the 68HC908EY16 datasheet for characteristics of the
microcontroller chip. Characteristics noted under conditions 9.0 V ≤ V_SUP ≤ 16 V, -40°C ≤ T_J ≤ 135°C unless otherwise noted.
Typical values noted reflect the approximate parameter mean at T_A = 25°C under nominal conditions unless otherwise noted.
Characteristic
Symbol
Min
Typ
Max
Unit
LIN PHYSICAL LAYER
Propagation Delay ⁽¹¹⁾, ⁽¹²⁾
TXD LOW to LIN LOW
TXD HIGH to LIN HIGH
LIN LOW to RXD LOW
LIN HIGH to RXD HIGH
TXD Symmetry
RXD Symmetry
t _TXD-LIN-LOW
–
–
t _TXD-LIN-HIGH
–
–
t _LIN-RXD-LOW
–
4.0
t _LIN-RXD-HIGH
–
4.0
t _TXD-SYM
- 2.0
–
t _RXD-SYM
- 2.0
–
µs
6.0
6.0
8.0
8.0
2.0
2.0
Output Falling Edge Slew Rate ⁽¹¹⁾, ⁽¹³⁾
80% to 20%
SR_F
V/µs
-1.0
- 2.0
- 3.0
Output Rising Edge Slew Rate ⁽¹¹⁾, ⁽¹³⁾
20% to 80%, R_BUS > 1.0 kΩ, C_BUS < 10 nF
SR_R
V/µs
1.0
2.0
3.0
LIN Rise / Fall Slew Rate Symmetry ⁽¹¹⁾, ⁽¹³⁾
SR_S
- 2.0
–
2.0
µs
AUTONOMOUS WATCHDOG (AWD)
AWD Oscillator Period
AWD Period Low = 512 t _OSC
t _OSC
–
40
–
µs
t _AWDPH
16
22
28
ms
AWD Period High = 256 t _OSC
t _AWDPL
8.0
11
14
ms
Notes
11. All LIN characteristics are for initial LIN slew rate selection (20 kbaud) (SRS0:SRS1= 00).
12. See Figure 4, page 12.
13. See Figure 5, page 12.
908E626
10
Analog Integrated Circuit Device Data
Freescale Semiconductor