M
3
All data sheets are subject to change without notice
2002 Maxwell Technologies.
All rights reserved.
Programmable Skew Clock Buffer (PSCB)
7B991
09.23.02 Rev 4
T
ABLE
3. D
ELTA
L
IMITS
P
ARAMETER
V
ARIATION
I
CCQ
I
CCN
±10% of specified value in Table 5
±10% of specified value in Table 5
T
ABLE
4. 7B991 R
ECOMMENDED
O
PERATING
C
ONDITIONS
P
ARAMETER
S
YMBOL
M
IN
M
AX
U
NIT
Supply Voltage
Input HIGH Voltage (REF and FB
inputs only)
Input LOW Voltage (REF and FB
inputs only)
Three-Level Input HIGH Voltage (Test,
FS, xFn)
1
Thermal Impedance
V
CC
V
IH
-0.5
2.0
+7.0
V
CC
V
V
V
IL
-0.5
0.8
V
1. These inputs are normally wired to V
CC
,GND, or left unconnected (actual threshold voltages vary as a percentage of V
CC
).
Internal termnation resistors hold unconnected inputs at V
CC
/2. If these inputs are switched, the function and timng of the out-
puts may glitch and the PLL may require an additional t
LOCK
time before all datasheet limts are achieved.
V
IHH
V
CC
-0.85
V
CC
V
Θ
JC
--
3.43
°
C/W
T
ABLE
5. 7B991 DC E
LECTRICAL
C
HARACTERISTICS
(V
CC
= 5V ±10%, T
A
= -40
TO
85
°
C,
UNLESS
OTHERWISE
SPECIFIED
)
S
YMBOL
T
EST
C
ONDITIONS
P
ARAMETER
S
UBGROUPS
M
IN
M
AX
U
NIT
Output HIGH Voltage
Output LOW Voltage
Input HIGH Voltage (REF and FB
inputs only)
Input LOW Voltage (REF and FB
inputs only)
Three-Level Input HIGH Voltage
(Test, FS, xFn)
1
Three-Level Input MID Voltage
(Test, FS, xFn)
1
Three-Level Input LOW Voltage
(Test, FS, xFn)
1
Input HIGH Leakage Current
(REF and FB inputs only)
Input LOW Leakage Current
(REF and FB inputs only)
V
OH
V
OL
V
IH
V
CC
= Mn, I
OH
= -16 mA
V
CC
= Mn, I
OL
= 46 mA
1, 2, 3
1, 2, 3
1, 2, 3
2.4
--
2.0
--
V
V
V
0.45
--
V
IL
1, 2, 3
--
0.8
V
V
IHH
Mn < V
CC
< Max
1, 2, 3
V
CC
-0.85
--
V
V
IMM
Mn < V
CC
< Max
1, 2, 3
V
CC
/2 -
500 mV
0.0
V
CC
/2 +
500 mV
0.85
V
V
ILL
Mn < V
CC
< Max
1, 2, 3
V
I
IH
V
CC
= Max, V
IN
= 5V
1, 2, 3
--
10
μA
I
IL
V
CC
= Max, V
IN
= 0.4V
1, 2, 3
-500
--
μA