MC33990 datasheet(7/16 Pages) FREESCALE

Teilenummer	MC33990

Bauteilbeschribung	Enhanced Class B Serial Transceiver

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Hersteller	FREESCALE [Freescale Semiconductor, Inc]

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MOTOROLA ANALOG INTEGRATED CIRCUIT DEVICE DATA

33990

7

DYNAMIC ELECTRICAL CHARACTERISTICS

Characteristics noted under conditions of 7.0 V

≤ VBAT ≤ 16 V, -40°C ≤ TA ≤ 125°C, SLEEP = 5.0 V unless otherwise noted. Typical

values reflect the parameter's approximate midpoint average value with VBAT = 13 V, TA = 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 (Note 8) (9.0 V

≤ VBAT ≤ 16 V, Tx = 7.812 kHz Square

Wave) (see Figure 4)

BUS Load = 3,300 pF and 1.38 k

Ω to GND

BUS Load = 16,500 pF and 300

Ω to GND

trise(BUS)

9.0

11.15

11.86

15

µs

BUS Voltage Fall Time (Note 8) (9.0 V

≤ VBAT ≤ 16 V, Tx = 7.812 kHz Square

Wave) (see Figure 4)

BUS Load = 3,300 pF and 1.38 k

Ω to GND

BUS Load = 16,500 pF and 300

Ω to GND

tfall(BUS)

9.0

10.50

11.17

15

µs

Pulse Width Distortion Time (9.0 V

≤ VBAT ≤ 16 V, Tx = 7.812 kHz Square Wave)

(see Figure 5)

BUS Load = 3,300 pF and 1.38 k

Ω to GND

tpwd(BUS)

35

62

93

µs

Propagation Delay

Tx Threshold to Rx Threshold

tpd(BUS)

–

17.7

25

µs

Tx

Tx to BUS Delay Time (Tx = 2.5 V to VBUS = 3.875 V) (Figure 6)

4X Mode

Normal Mode

tTxDelay

–

13

2.6

17.3

4.0

24

µs

SLEEP

to Tx Setup Time (Figure 6)

tSLEEPTxSU

80

40

–

µs

Rx

Rx Output Delay Time (Tx = 2.5 V to VBUS = 3.875 V) (see Figure 7)

Low-to-Output High

High-to-Output Low

tRxDelay/L–H

tRxDelay/H–L

–

0.11

0.38

2.0

µs

Rx Output Transition Time (CRx = 50 pF to GND, 10% and 90% Points)

(see Figure 8)

Low-to-Output High

High-to-Output Low

tRxTrans/L–H

tRxTrans/H–L

–

0.34

0.08

1.0

µs

Rx Output Transition Time (Note 9) (CRx = 50 pF to GND, SLEEP = 0 V, 10% and

90% Points) (see Figure 8)

Low-to-Output High

High-to-Output Low

tRxTrans/L–H

tRxTrans/H–L

–

0.32

0.08

5.0

µs

Notes

8.

Typical is the parameter's approximate average value with VBAT = 13 V, TA = 25°C.

9.

Rx Output Transition Time from a sleep state.

Freescale Semiconductor, Inc.

For More Information On This Product,

Go to: www.freescale.com

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