Datasheet

SN74SSTL16847
20-BIT SSTL_3 INTERFACE BUFFER
WITH 3-STATE OUTPUTS
SCBS709A – OCTOBER 1997 – REVISED MAY 1998
6–11
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
recommended operating conditions (see Note 4)
MIN NOM MAX UNIT
V
CC
Supply voltage V
DDQ
3.6 V
V
DDQ
Output supply voltage 3 3.6 V
V
REF
Reference voltage (V
REF
= 0.45 × V
DDQ
) 1.3 1.5 1.7 V
V
TT
Termination voltage V
REF
–50mV V
REF
V
REF
+50mV V
V
I
Input voltage 0 V
CC
V
V
IH
AC high-level input voltage All inputs V
REF
+400mV V
V
IL
AC low-level input voltage All inputs V
REF
–400mV V
V
IH
DC high-level input voltage All inputs V
REF
+200mV V
V
IL
DC low-level input voltage All inputs V
REF
–200mV V
I
OH
High-level output current –20
I
OL
Low-level output current 20
mA
T
A
Operating free-air temperature 0 70
_C
NOTE 4: All unused inputs of the device must be held at V
CC
or GND to ensure proper device operation. Refer to the TI application report,
Implications of Slow or Floating CMOS Inputs, literature number SCBA004.
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER TEST CONDITIONS V
CC
MIN TYP
†
MAX UNIT
V
IK
I
I
= –18 mA 3 V –1.2 V
I
OH
= –100 µA 3 V to 3.6 V V
CC
–0.2
V
OH
I
OH
= –16 mA 2.2
V
I
OH
= –20 mA
3 V
2.1
I
OL
= 100 µA 3 V to 3.6 V 0.2
V
OL
I
OL
= 16 mA 0.5
V
I
OL
= 20 mA
3 V
0.55
Data inputs, OE
V
I
= 2.1 V or 0.9 V, V
REF
= 1.3 V or 1.7 V ±5 µA
I
I
V
REF
V
REF
= 1.3 V or 1.7 V
3.6 V
±150 µA
I
OZ
V
O
= 0.9 V or 2.1 V 3.6 V ±10 µA
I
CC
V
I
= 2.1 V or 0.9 V, I
O
= 0 3.6 V 90 mA
Control inputs 2
C
i
A port
V
I
= 2.1 V or 0.9 V 3.3 V
2.5
pF
C
o
Y port V
O
= 2.1 V or 0.9 V 3.3 V 3.5 pF
†
All typical values are at V
CC
= 3.3 V, T
A
= 25°C.