DLPC3433 datasheet(49/62 Pages) TI1

49 / 62 page

DLPC3433, DLPC3438

www.ti.com

DLPS035B – FEBRUARY 2014 – REVISED JANUARY 2016

If an external oscillator is used, then the oscillator output must drive the PLL_REFCLK_I pin on the DLPC343x

ASIC and the PLL_REFCLK_O pins should be left unconnected.

Table 12. DLPC343x Recommended Crystal Parts(1)(2)(3)

PASSED

TEMPERATURE

LOAD

MANUFACTURER

PART NUMBER

SPEED

ESR

DVT

AND AGING

CAPACITANCE

Yes

KDS

1ZZCAA24000EE0C

24 MHz

±50 ppm

120-

Ω max

8 pF

Muratta

XRCGB24M000F0L11R0

24 MHz

±100 ppm

120-

Ω max

6 pF

NX2016SA 24M

NDK

24 MHz

±145 ppm

120-

Ω max

6 pF

EXS00A-CS05733

(1)

These crystal devices appear compatible with the DLPC343x, but only those marked with yes in the DVT column have been validated.

(2)

Crystal package sizes: 2.0 × 1.6 mm for both crystals

(3)

Operating temperature range: –30°C to +85°C for all crystals

11.1.3 General PCB Recommendations

TI recommends 1-oz. copper planes in the PCB design to achieve needed thermal connectivity.

11.1.4 General Handling Guidelines for Unused CMOS-Type Pins

To avoid potentially damaging current caused by floating CMOS input-only pins, TI recommends that unused

ASIC input pins be tied through a pullup resistor to its associated power supply or a pulldown to ground. For

ASIC inputs with an internal pullup or pulldown resistors, it is unnecessary to add an external pullup or pulldown

unless specifically recommended. Note that internal pullup and pulldown resistors are weak and should not be

expected to drive the external line. The DLPC343x implements very few internal resistors and these are noted in

the pin list. When external pullup or pulldown resistors are needed for pins that have built-in weak pullups or

pulldowns, use the value 8 k

Ω (max).

Unused output-only pins should never be tied directly to power or ground, but can be left open.

When possible, TI recommends that unused bidirectional I/O pins be configured to their output state such that

the pin can be left open. If this control is not available and the pins may become an input, then they should be

pulled-up (or pulled-down) using an appropriate, dedicated resistor.

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