BCM384y120x1K5AC1
Signal Characteristics
Specifications apply over all line, load conditions, unless otherwise noted; Boldface specifications apply over the temperature range of -40°C ≤ TINTERNAL
≤ 125°C (T-Grade); All other specifications are at TINTERNAL = 25ºC unless otherwise noted.
UART SER-IN / SER-OUT Pins
• Universal Asynchronous Receiver/Transmitter (UART) pins.
• The BCM communication version is not intended to be used without a Digital Supervisor.
• Isolated I2C communication and telemetry is available when using Vicor Digital Isolator and Vicor Digital Supervisor. Please see specific product data sheet
for more details.
• UART SER-IN pin is internally pulled high using a 1.5 kΩ to 3.3 V.
SIGNAL TYPE
GENERAL I/O
STATE
ATTRIBUTE
Baud Rate
SYMBOL
CONDITIONS / NOTES
MIN
TYP MAX UNIT
BRUART
Rate
750
Kbit/s
SER-IN Pin
VSER-IN_IH
VSER-IN_IL
2.3
V
V
SER-IN Input Voltage Range
1
DIGITAL
INPUT
SER-IN rise time
SER-IN fall time
SER-IN RPULLUP
tSER-IN_RISE 10% to 90%
tSER-IN_FALL 10% to 90%
RSER-IN_PLP Pull up to 3.3 V
CSER-IN_EXT
400
25
ns
ns
kΩ
pF
1.5
SER-IN External Capacitance
400
Regular
SER-OUT Pin
Operation
VSER-OUT_OH 0 mA ≥ IOH ≥ -4 mA
VSER-OUT_OL 0 mA ≤ IOL ≤ 4 mA
2.8
V
V
SER-OUT Output Voltage
Range
0.5
DIGITAL
OUTPUT
SER-OUT rise time
tSER-OUT_RISE 10% to 90%
tSER-OUT_FALL 10% to 90%
55
45
ns
ns
SER-OUT fall time
SER-OUT source current
SER-OUT output impedance
ISER-OUT
ZSER-OUT
VSER-OUT = 2.8 V
mA
Ω
6
120
Enable / Disable Control
• The EN pin is a standard analog I/O configured as an input to an internal µC.
• It is internally pulled high to 3.3 V.
• When held low the BCM internal bias will be disabled and the powertrain will be inactive.
• In an array of BCMs, EN pins should be interconnected to synchronize startup and permit startup into full load conditions.
• Enable / disable command will have no effect if the EN pin is disabled.
SIGNAL TYPE
STATE
ATTRIBUTE
SYMBOL
CONDITIONS / NOTES
MIN
2.3
TYP MAX UNIT
VIN > VIN_UVLO+
,
Startup
EN to Powertrain active time
tEN_START
EN held low both conditions satisfied
for t > tUVLO+_DELAY
250
µs
ANALOG
INPUT
EN Voltage Threshold
EN Resistance (Internal)
EN Disable Threshold
VENABLE
REN_INT
V
kΩ
V
Regular
Internal pull up resistor
1.5
Operation
VEN_DISABLE_TH
1
BCM® Bus Converter
Page 9 of 23
Rev 1.4
05/2015
vicorpower.com
800 927.9474
VICOR [ VICOR CORPORATION ]
