Datasheet

LTC6903/LTC6904
4
69034fe
SYMBOL PARAMETER MIN TYP MAX UNITS
LTC6903 (Notes 5, 6)
f
SCK
Serial Port Clock Frequency
l
20 MHz
t
CKHI
Min Clock HIGH Time
l
25 ns
t
CKLO
Min Clock LOW Time
l
25 ns
t
SU
Min Setup Time – SDI to SCK
l
10 ns
t
HLD
Min Hold Time – SCK to SDI
l
10 ns
t
LCH
Min Latch Time – SEN to SEN
l
400 ns
t
FCK
Min First Clock – SEN to SCK
l
20 ns
LTC6904 (Notes 5, 6)
f
SMB
SMBus Operating Frequency
l
10 100 kHz
t
BUF
Bus Free Time Between STOP and START Condition
l
4.7 µs
t
HD,STA
Hold Time After (Repeated) START Condition
l
4.0 µs
t
SU,STA
Repeated START Condition Setup Time
l
4.7 µs
t
SU,STO
STOP Condition Setup Time
l
4.0 µs
LTC6904 (Notes 5, 6)
t
HD,DAT
Data Hold Time
l
300 ns
t
SU,DAT
Data Setup Time
l
250 ns
t
LOW
Clock LOW Period
l
4.7 µs
t
HIGH
Clock HIGH Period
l
4.0 50 µs
t
f
Clock, Data Fall Time
l
300 ns
t
r
Clock, Data Rise Time
l
1000 ns
TiMing characTerisTics
The l denotes the specifications which apply over the full operating temperature
range, otherwise specifications are at T
A
= 25°C. V
+
= 2.7V to 5.5V, GND = 0V, unless otherwise noted.
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and
lifetime.
Note 2: A heat sink may be required to keep the junction temperature
below the absolute maximum when the output is shorted indefinitely.
Note 3: The LTC6903CMS8, LTC6904CMS8, LTC6903IMS8 and
LTC6904IMS8 are guaranteed functional over the operating temperature
range of –40°C to 85°C.
Note 4: The LTC6903CMS8 and LTC6904CMS8 are guaranteed to meet
the specified performance limits over the 0°C to 70°C temperature range
and are designed, characterized and expected to meet the specified
performance from –40°C to 85°C but are not tested or QA sampled
at these temperatures. The LTC6903IMS8 and LTC6904IMS8 are
guaranteed to meet the specified performance limits over the –40°C to
85°C temperature range. The LTC6903HMS8 and LTC6904HMS8 are
guaranteed to meet the specified performance limits over the –40°C to
125°C temperature range. The LTC6904MPMS8 is guaranteed to meet the
specified performance limits over the –55°C to 125°C temperature range.
Note 5: All values are referenced to V
IH
and V
IL
levels.
Note 6: Guaranteed by design and not subject to test.
Note 7: Parts with tighter frequency accuracy are available. Consult LTC
Marketing for details.
serial porT elecTrical characTerisTics
The l denotes the specifications which apply over
the full operating temperature range, otherwise specifications are at T
A
= 25°C. V
+
= 2.7V to 5.5V, GND = 0V, unless otherwise noted.
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
IH
Min High Level Input Voltage
SEN, SCK, SDI Pins
l
0.67 V
+
V
V
IL
Max Low Level Input Voltage
SEN, SCK, SDI Pins
l
0.33 V
+
V
I
IN
Digital Input Leakage
SEN, SCK, SDI Pins
l
10 µA