S

REF

D

REF

G

REF

SW

SW

GTL2003

D1

S1

D2

S2

Sn

GND

Dn

R

R

R

PU

PU

PU

V

= 1.8V

REF

R

200K

PU

CPU I/O

Chipset

I/O

V

= 5 V

DPU

SN74GTL2003

www.ti.com

SCDS305

– FEBRUARY 2011

Unidirectional Up Translation

For unidirectional up translation (lower voltage to higher voltage), the reference transistor is connected the same

as for a down translation. A pullup resistor is required on the higher voltage side (Dn or Sn) to get the full HIGH

translation. The driver on the lower voltage side only needs pullup resistors if it is open drain.

Figure 7. Unidirectional Up Translation to Higher-Voltage Chipsets

© 2011, Texas Instruments Incorporated

Submit Documentation Feedback

11

Product Folder Link(s): SN74GTL2003