Data Sheet
PCA9615 All information provided in this document is subject to legal disclaimers. © NXP Semiconductors N.V. 2016. All rights reserved.
Product data sheet Rev. 1.1 — 10 May 2016 2 of 29
NXP Semiconductors
PCA9615
2-channel multipoint Fm+ dI
2
C-bus buffer with hot-swap logic
2. Features and benefits
New dI
2
C-bus buffers offer improved resistance to system noise and ground offset up
to
1
⁄
2
of supply voltage
2 channel dI
2
C (differential I
2
C-bus) to Fm+ single-ended buffer operating up to 1 MHz
with 30 mA SDA/SCL drive capability
Hot swap (allows insertion or removal of modules or card without disruption to bus
data)
EN signal (PCA9615 input) controls PCA9615 hot swap sequence
Bus idle detect (PCA9615 internal function) waits for a bus idle condition before
connection is made
Compatible with I
2
C-bus Standard/Fast-mode and SMBus, Fast-mode Plus up to
1MHz
Single-ended I
2
C-bus on card side up to 540 pF
Differential I
2
C-bus on cable side supporting multi-drop bus
Maximum cable length: 3 m (approximately 10 feet) (longer at lower frequency)
dI
2
C output: 1.5 V differential output with nominal terminals
Differential line impedance (user defined): 100 nominal suggested
Receive input sensitivity: 200 mV
Hysteresis: 30 mV typical
Input impedance: high-impedance (200 k typical)
Receive input voltage range: 0.5 V to +5.5 V
Lock-up free operation
Supports arbitration and clock stretching across the dI
2
C-bus buffers
Powered-off and powering-up high-impedance I
2
C-bus pins
Operating supply voltage (V
DD(A)
) range of 2.3 V to 5.5 V with single-ended side 5.5 V
tolerant
Differential I
2
C-bus operating supply voltage (V
DD(B)
) range of 3.0 V to 5.5 V with
5.5 V tolerant. Best operation is at 5 V.
ESD protection exceeds 2000 V HBM per JESD22-A114 and 1000 V CDM per
JESD22-C101
Latch-up testing is done to JEDEC Standard JESD78 which exceeds 100 mA
Fig 1. SMBus/I
2
C-bus translation to dI
2
C-bus and back to SMBus/I
2
C-bus
V
DD(A)1
SCL
SDA
PCA9615
aaa-011961
dI
2
C-bus
(differential I
2
C-bus,
1 of 2 lines shown)
twisted-pair cable
single-ended
I
2
C-bus
PCA9615
SCL
SDA
GND1 GND2
V
DD(A)2
single-ended
I
2
C-bus
V
DD(B)
V
DD(B)
EN
EN
V
DD(B)
V
DD(B)