SN74GTL2003RKSR datasheet(10/20 Pages) TI1

No. de pieza	SN74GTL2003RKSR

Descripción Electrónicos	8-BIT BIDIRECTIONAL LOW-VOLTAGE TRANSLATOR

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Fabricante Electrónico	TI1 [Texas Instruments]

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S

REF

D

REF

G

REF

SW

GTL2003

D1

S1

D2

S2

Sn

GND

Dn

V

= 1.8V

REF

200K

CPU I/O

Chipset

I/O

V

= 5 V

DPU

SN74GTL2003

SCDS305

– FEBRUARY 2011

www.ti.com

Unidirectional Down Translation

For unidirectional clamping (higher voltage to lower voltage), the GREF input must be connected to DREF and both

pins pulled to the higher-side VCC through a pullup resistor (typically 200 kW). A filter capacitor on DREF is

recommended. Pullup resistors are required if the chipset I/Os are open drain. The opposite side of the reference

transistor (SREF) is connected to the processor core power-supply voltage. When DREF is connected through a

200-kW resistor to a 3.3-V to 5.5-V VCC supply and SREF is set between 1 V to VCC – 1.5 V, the output of each Sn

has a maximum output voltage equal to SREF.

Figure 6. Unidirectional Down Translation to Protect Low-Voltage Processor Pins

10

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SN74GTL2003RKSR Datasheet(PDF) 10 Page - Texas Instruments

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