P82B715TD,112 NXP Semiconductors, P82B715TD,112 Datasheet - Page 4
![IC I2C BUS EXTENDER 8-SOIC](/photos/5/44/54425/568-8-soic_sot96-1_sml.jpg)
P82B715TD,112
Manufacturer Part Number
P82B715TD,112
Description
IC I2C BUS EXTENDER 8-SOIC
Manufacturer
NXP Semiconductors
Type
Bus Extenderr
Datasheet
1.P82B715TD118.pdf
(23 pages)
Specifications of P82B715TD,112
Package / Case
8-SOIC (3.9mm Width)
Tx/rx Type
I²C Logic
Delay Time
250ns
Capacitance - Input
3000pF
Voltage - Supply
4.5 V ~ 12 V
Current - Supply
22mA
Mounting Type
Surface Mount
Logic Family
P82B
Number Of Lines (input / Output)
1 / 1
Propagation Delay Time
250 ns
Operating Supply Voltage
4.5 V to 12 V
Power Dissipation
300 mW
Operating Temperature Range
- 40 C to + 85 C
Logic Type
I2C Bus Extender
Mounting Style
SMD/SMT
Number Of Input Lines
1
Number Of Output Lines
1
Output Current
60 mA
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Lead Free Status / RoHS Status
Lead free / RoHS Compliant, Lead free / RoHS Compliant
Other names
568-3981-5
935154770112
P82B715TD
P82B715TD
935154770112
P82B715TD
P82B715TD
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
P82B715TD,112
Manufacturer:
CIRRUS
Quantity:
130
NXP Semiconductors
7. Functional description
P82B715_8
Product data sheet
7.1 Sx, Sy: I
The P82B715 is a dual bidirectional logic signal device having unity voltage gain in both
directions, but 10 current amplification in one direction that allows increasing the
allowable I
and requires no external directional control. It uses unidirectional analog current
amplification to increase the current sink capability of I
to change the I
I
cables and without degradation of system performance.
P82B715 provides current amplification from its I
bus. Whenever current is flowing out of Sx, into an I
P82B715 will sink ten times that current into Lx to drive the buffered bus LOW (see
Figure
To minimize interference and ensure stability, the current rise and fall times of the Lx drive
amplifier are internally controlled.
The P82B715 does not amplify signal currents flowing in the other direction, i.e., into Sx
from the I
buffered side.
The buffered bus logic LOW voltage at Lx simply drives the I
internal 30
depends on the current flowing in the sense resistor so it will be very small when the bus
currents are small, but it is guaranteed not to exceed 100 mV in either direction with full
static I
The unity voltage gain, with signal current amplification dependent on direction, preserves
the multi-master, bidirectional, open-collector/open-drain, characteristic of any connected
I
signal voltage levels will be clamped at (V
the supply voltage V
On the normal side, because the two buffer circuits in the P82B715 are identical, either
the Sx or Sy input pins can be used as the I
2
2
Fig 4.
C-bus, or similar bus systems, to be extended over long distances using conventional
C-bus lines and provides these characteristics to the new low-impedance bus. Bus logic
I
2
C-bus Sx
GND
2
V
4).
C-bus loading.
CC
2
Equivalent circuit: one-half P82B715
C-bus. The Sx pin is driven LOW by current flowing out of Lx to the driver of that
2
2
C-bus system capacitance. It contains identical circuits for each I
C-bus SDA or SCL
resistor. The buffer’s offset voltage (the difference between Sx and Lx)
2
C-bus specification limit of 400 pF to a 4 nF system limit. This allows
I
CC
Sx
Rev. 08 — 9 November 2009
.
CURRENT
SENSE
30
CC
I
Sx
2
C-bus SDA data line, or the SCL clock line.
+ 0.7 V), but otherwise are independent of
= I
Lx
2
C-bus to its low-impedance or buffered
2
C-bus chip driving the I
2
C-bus chips by a factor of 10 and
I
Sx
2
C-bus at Sx LOW via the
9
I
Sx
I
Lx
P82B715
© NXP B.V. 2009. All rights reserved.
I
2
= 10
C-bus extender
2
2
C-bus signal
Lx buffered bus
C-bus LOW,
I
Sx
002aad688
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