HC705JB2GRSSLASHH datasheet(122/128 Pages) NXP

122 / 128 page

GENERAL RELEASE SPECIFICATION

August 28, 1998

ELECTRICAL SPECIFICATIONS

MC68HC705JB2

13-4

REV 1.1

13.5

USB LOW SPEED SOURCE ELECTRICAL CHARACTERISTICS

NOTES:

1. All voltages measured from local ground, unless otherwise specified.

2. All timings use a capacitive load of 50pF, unless otherwise specified.

3. Low speed timings have a 1.5k pull-up to 2.8V on the D- data line.

4. Measured from 10% to 90% of the data signal.

5. The rising and falling edges should be smooth transitional (monotonic).

6. Timing differences between the differential data signals.

7. Measured at crossover point of differential data signals.

8. Capacitive loading includes 50pF of tester capacitance.

Table 13-5. USB Low Speed Source Electrical Characteristics

Parameter

Symbol

Conditions

(Notes 1,2,3)

Min

Typ

Max

Unit

Transition time:

Rise Time

Fall Time

Notes 4, 5, 8

CL=50pF

CL=350pF

CL=50pF

CL=350pF

300

Rise/Fall Time Matching

TRFM

TR/TF

120

Output Signal Crossover

Voltage

VCRS

1.3

2.0

Low Speed Data Rate

TDRATE

1.5Mbs

±1.5%

1.4775

676.8

1.500

666.0

1.5225

656.8

Mbs

Source Differential Driver Jitter

To Next Transition

For Paired Transitions

TUDJ1

TUDJ2

CL=350pF

Notes 6,7 and

Figure 12-2

–25

–10

Receiver Data Jitter Tolerance

To Next Transition

For Paired Transitions

TDJR1

TDJR2

CL=350pF

Notes 7 and

Figure 12-4

–75

–45

Source EOP Width

TEOPT

Note 7 and

Figure 12-3

1.25

1.50

µs

Differential to EOP Transition

Skew

TDEOP

Note 7 and

Figure 12-3

–40

100

Receiver EOP Width

Must Reject as EOP

Must Accept

TEOPR1

TEOPR2

Note 7 and

Figure 12-3

330

675

Freescale Semiconductor, Inc.

For More Information On This Product,

Go to: www.freescale.com

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