Datasheet

SA00647
S
REF
S1 S8
D
REF
D1 D8G
REF
SN74GTL2003
www.ti.com SCDS305A –FEBRUARY 2011–REVISED MARCH 2013
FUNCTION TABLES
Table 2. HIGH-to-LOW Translation
(Assuming Dn is at the Higher Voltage Level)
(1)
INPUTS OUTPUT
G
REF
(2)
D
REF
S
REF
TRANSISTOR
D8–D1 S8–S1
H H 0 V X X Off
H H V
TT
(3)
H V
TT
(4)
On
H H V
TT
L L
(5)
On
L L 0 – V
TT
X X Off
(1) H = HIGH voltage level, L = LOW voltage level, X = don't care.
(2) G
REF
should be at least 1.5 V higher than S
REF
for best translator operation.
(3) V
TT
is equal to the S
REF
voltage.
(4) Sn is not pulled up or pulled down.
(5) Sn follows the Dn input LOW.
Table 3. LOW-to-HIGH Translation
(Assuming Dn is at the Higher Voltage Level)
(1)
INPUTS OUTPUT
GREF
(2)
DREF SREF TRANSISTOR
D8–D1 S8–S1
H H 0 V X X Off
H H V
TT
(3)
V
TT
H
(4)
Nearly Off
H H V
TT
L L
(5)
On
L L 0 – V
TT
X X Off
(1) H = HIGH voltage level, L = LOW voltage level, X = don't care.
(2) G
REF
should be at least 1.5 V higher than S
REF
for best translator operation.
(3) V
TT
is equal to the S
REF
voltage.
(4) Dn is pulled up to VCC through an external resistor.
(5) Dn follows the Sn input LOW.
Figure 1. CLAMP SCHEMATIC
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