LTC4259CGW Linear Technology, LTC4259CGW Datasheet - Page 4

• Manufacturer Part Number: LTC4259CGW
• Manufacturer: Linear Technology

Specifications of LTC4259CGW

• Linear Misc Type: Negative Voltage
• Operating Supply Voltage (typ): -48V
• Operating Supply Voltage (max): -57V
• Operating Temperature (min): 0C
• Operating Temperature (max): 70C
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Pin Count: 36
• Lead Free Status / Rohs Status: Not Compliant

temperature range, otherwise specifications are at T
LTC4259
ELECTRICAL CHARACTERISTICS
SYMBOL
DC
t
t
I
f
t
t
t
t
t
t
t
t
t
t
t
t
t
Note 1: Absolute Maximum Ratings are those values beyond which the life
of the device may be impaired.
Note 2: DGND to AGND voltages beyond 100mV will prevent proper
operation of the classification function.
Note 3: An internal clamp limits the GATE pins to a minimum of 12V above
V
Note 4: When a port powers on or off, the transient voltage on the port
couples through C
protection circuitry to withstand transient currents of up to 80mA for 5ms.
As long as the absolute value of the current remains below 80mA, the
LTC4259 will keep the voltage at the DETECT n pin within the absolute
maximum voltage range. A properly sized R
than 60mA.
Note 5: All currents into device pins are positive; all currents out of device
pins are negative. All voltages are referenced to ground (AGND and DGND)
unless otherwise specified.
4
DIS
VMIN
2
SCLK
1
2
3
4
5
6
7
8
r
f
FLTINT
STOPINT
ARAINT
EE
C Timing
CLMAX
. Driving this pin beyond the clamp may damage the part.
PARAMETER
Maximum Current Limit Duty Cycle
Disconnect Delay
DC Disconnect Minimum Pulse
Width Sensitivity
Clock Frequency
Bus Free Time
Start Hold Time
SCL Low Time
SCL High Time
Data Hold Time
Data Set-Up Time
Start Set-Up Time
Stop Set-Up Time
SCL, SDAIN Rise Time
SCL, SDAIN Fall Time
Fault Present to INT Pin Low
Stop Condition to INT Pin Low
ARA to INT Pin High Time
DET
(Figure 15). The LTC4259 contains internal
DET
will limit the current to less
CONDITIONS
t
t
t
t
V
(Note 8)
Figure 6 (Notes 8, 9)
Figure 6 (Notes 8, 9)
Figure 6 (Notes 8, 9)
Figure 6 (Notes 8, 9)
Figure 6 (Notes 8, 9)
Figure 6 (Notes 8, 9)
Figure 6 (Notes 8, 9)
Figure 6 (Notes 8, 9)
Figure 6 (Notes 8, 9)
Figure 6 (Notes 8, 9)
(Notes 8, 9, 10)
(Notes 8, 9, 10)
(Notes 8, 9)
DIS1
DIS1
DIS1
DIS1
SENSE n
A
= 0, t
= 0, t
= 1, t
= 1, t
= 25 C. V
– V
DIS0
DIS0
DIS0
DIS0
The
EE
> 5mV, V
= 0 (Figures 4, 5)
= 1
= 0
= 1
DD
denotes the specificatiions which apply over the full operating
= 3.3V, V
Note 6: Voltage at the Ethernet connector must be at least – 44V for
IEEE 802.3af compliance. The minimum V
account for the drop across the diode D
Note 7: Unless otherwise specified, AC disconnect specifications require
the following conditions: the DETECT n pin is connected to the port as
shown in Figure 1, a valid sine wave is applied to OSCIN, the OSCFAIL bit
is cleared and AC disconnect is enabled.
Note 8: Guaranteed by design, not subject to test.
Note 9: Values measured at V
Note 10: If fault occurs during an I
down until a stop condition is present on the I
OUT n
= –48V (Figure 4)
EE
= –48V unless otherwise noted (Note 5).
ILD
and V
2
C transaction, INT pin will not be pulled
MIN
300
150
600
600
600
150
200
600
600
5.8
1.3
1.3
75
20
20
20
60
20
IHD
AC
EE
.
in Figure 15.
supply voltage must take
2
C bus.
0.02
TYP
360
180
720
6.3
90
MAX
400
100
200
800
400
300
150
150
200
300
6.7
1
UNITS
4259i
kHz
ms
ms
ms
ms
ms
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
%
s
s