AM5728 datasheet(203/415 Pages) TI1

203 / 415 page

vssa_osc1

Device

xo_osc1

xi_osc1

SPRS85v_CLK_10

203

AM5729, AM5728, AM5726

www.ti.com

SPRS953F – DECEMBER 2015 – REVISED MAY 2019

Submit Documentation Feedback

Product Folder Links: AM5729 AM5728 AM5726

Clock Specifications

Table 6-5. OSC1 Crystal Electrical Characteristics (continued)

NAME

DESCRIPTION

MIN

TYP

MAX

UNIT

tj(xiosc1)

Frequency accuracy(1), xi_osc1

Ethernet not used

±200

ppm

Ethernet RGMII and RMII

using derived clock

±50

Ethernet MII using derived

clock

±100

(1) Crystal characteristics should account for tolerance+stability+aging.

When selecting a crystal, the system design must take into account the temperature and aging

characteristics of a crystal versus the user environment and expected lifetime of the system.

Table 6-6 details the switching characteristics of the oscillator and the requirements of the input clock.

Table 6-6. Oscillator Switching Characteristics—Crystal Mode

NAME

DESCRIPTION

MIN

TYP

MAX

UNIT

Oscillation frequency

Range from 19.2 to 32

MHz

tsX

Start-up time

6.1.3.2

OSC1 Input Clock

A 1.8-V LVCMOS-Compatible Clock Input can be used instead of the internal oscillator to provide the

SYS_CLK2 clock input to the system. The external connections to support this are shown in, Figure 6-8.

The xi_osc1 pin is connected to the 1.8-V LVCMOS-Compatible clock sources. The xo_osc1 pin is left

unconnected. The vssa_osc1 pin is connected to board ground (vss).

Figure 6-8. 1.8-V LVCMOS-Compatible Clock Input

Table 6-7 summarizes the OSC1 input clock electrical characteristics.

Table 6-7. OSC1 Input Clock Electrical Characteristics—Bypass Mode

NAME

DESCRIPTION

MIN

TYP

MAX

UNIT

Frequency

Range from 12 to 38.4

MHz

Input capacitance

2.819

3.019

3.219

Input current (3.3V mode)

µA

tsX

Start-up time(1)

See(2)

AM5728 Datasheet(PDF) 203 Page - Texas Instruments

AM5728 Datasheet(HTML) 203 Page - Texas Instruments

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL