33990_06 Datasheet, PDF (7/16 Pages) Freescale Semiconductor, Inc – Enhanced Class B Serial Transceiver

ELECTRICAL CHARACTERISTICS
DYNAMIC ELECTRICAL CHARACTERISTICS
DYNAMIC ELECTRICAL CHARACTERISTICS
Table 5. Dynamic Electrical Characteristics
Characteristics noted under conditions of 7.0 V ≤ V_BAT ≤ 16 V, -40°C ≤ T_A ≤ 125°C, SLEEP = 5.0 V unless otherwise noted.
Typical values reflect the parameter's approximate midpoint average value with V_BAT = 13 V, T_A = 25°C. All positive currents
are into the pin. All negative currents are out of the pin.
Characteristic
Symbol
Min
Typ
Max
Unit
BUS
BUS Voltage Rise Time ⁽¹⁰⁾ (9.0 V ≤ V_BAT ≤ 16 V, Tx = 7.812 kHz Square
Wave) (see Figure 6)
t_{rise (BUS)}
BUS Load = 3,300 pF and 1.38 kΩ to GND
9.0
BUS Load = 16,500 pF and 300 Ω to GND
9.0
BUS Voltage Fall Time ⁽¹⁰⁾ (9.0 V ≤ V_BAT ≤ 16 V, Tx = 7.812 kHz Square
Wave) (see Figure 6)
t_{fall (BUS)}
BUS Load = 3,300 pF and 1.38 kΩ to GND
9.0
BUS Load = 16,500 pF and 300 Ω to GND
9.0
11.15
11.86
10.50
11.17
µs
15
15
µs
15
15
Pulse Width Distortion Time (9.0 V ≤ V_BAT ≤ 16 V, Tx = 7.812 kHz Square
t_{pwd (BUS)}
µs
Wave) (see Figure 7)
BUS Load = 3,300 pF and 1.38 kΩ to GND
35
62
93
Propagation Delay
TX Threshold to RX Threshold
t_{pd (BUS)}
µs
–
17.7
25
TX
TX to BUS Delay Time (Tx = 2.5 V to V_BUS = 3.875 V) (Figure 8)
4X Mode
Normal Mode
t_TxDelay
–
µs
2.6
4.0
13
17.3
24
SLEEP to Tx Setup Time (Figure 8)
RX
t_SLEEPTxSU
80
40
–
µs
RX Output Delay Time (TX = 2.5 V to V_BUS = 3.875 V) (see Figure 9)
Low-to-Output High
High-to-Output Low
t_{RxDelay / L–H}
–
t_{RxDelay / H–L}
–
RX Output Transition Time (C_Rx = 50 pF to GND, 10% and 90% Points)
(see Figure 10)
Low-to-Output High
High-to-Output Low
t_{RxTrans / L–H}
–
t_{RxTrans /H–L}
–
Rx Output Transition Time ⁽¹¹⁾ (C_Rx = 50 pF to GND, SLEEP = 0 V, 10% and
90% Points) (see Figure 10)
Low-to-Output High
High-to-Output Low
t_{RxTrans / L–H}
–
t_{RxTrans /H–L}
–
0.11
0.38
0.34
0.08
0.32
0.08
µs
2.0
2.0
µs
1.0
1.0
µs
5.0
5.0
Notes
10. Typical is the parameter's approximate average value with V_BAT = 13 V, T_A = 25°C.
11. RX Output Transition Time from a sleep state.
Analog Integrated Circuit Device Data
Freescale Semiconductor
33990
7