ADM2914-EP
Rev. 0 | Page 5 of 8
PIN CONFIGURATION AND FUNCTION DESCRIPTIONS
VH1
1
VL1
2
VH2
3
VL2
4
V
CC
16
TIMER
15
SEL
14
LATCH
13
VH3
5
VL3
6
VH4
7
UV
12
OV
11
REF
10
VL4
8
GND
9
ADM2914-EP
TOP VIEW
(Not to Scale)
09789-002
Figure 2. ADM2914-EP Pin Configuration
Table 4. Pin Function Descriptions
Pin No. Mnemonic Description
1 VH1
3 VH2
Voltage High Input 1 and Voltage High Input 2. If the voltage monitored by VH1 or VH2 drops below 0.5 V, an
undervoltage condition is detected. Connect to V
CC
when not in use.
2 VL1
4 VL2
Voltage Low Input 1 and Voltage Low Input 2. If the voltage monitored by VL1 or VL2 rises above 0.5 V, an
overvoltage condition is detected. Tie to GND when not in use.
5 VH3
7 VH4
Voltage High Input 3 and Voltage High Input 4. The polarity of these inputs is determined by the state of the SEL
pin. When the monitored input is configured as a positive voltage and the voltage monitored by VH3 or VH4 drops
below 0.5 V, an undervoltage condition is detected. Conversely, when the input is configured as a negative voltage
and the input drops below 0.5 V, an overvoltage condition is detected. Connect to V
CC
when not in use.
6 VL3
8 VL4
Voltage Low Input 3 and Voltage Low Input 4. The polarity of these inputs is determined by the state of the SEL pin.
When the monitored input is configured as a positive voltage and the voltage monitored by VL3 or VL4 rises above
0.5 V, an overvoltage condition is detected. Conversely, when the input is configured as a negative voltage and the
input rises above 0.5 V, an undervoltage condition is detected. Tie to GND when not in use.
9 GND Device Ground.
10 REF
Buffered Reference Output. This pin is a 1 V reference that is used as an offset when monitoring negative voltages.
This pin can source or sink 1 mA and drive loads up to 1 nF. Larger capacitive loads may lead to instability. Leave
unconnected when not in use.
11
OV
Overvoltage Reset Output. OV
is asserted low if a negative polarity input voltage drops below its associated
threshold or if a positive polarity input voltage exceeds its threshold. The ADM2914-EP allows OV
to be latched
low. This pin has a weak pull-up to VCC and can be pulled up to 16 V externally. Leave this pin unconnected when
not in use.
12
UV
Undervoltage Reset Output. UV
is asserted low if a negative polarity input voltage exceeds its associated threshold
or if a positive polarity input voltage drops below its threshold. UV
is held low for an adjustable timeout period set
by the external capacitor tied to the TIMER pin. The UV pin has a weak pull-up to V
CC
and can be pulled up to 16 V
externally via an external pull-up resistor. Leave this pin unconnected when not in use.
13
LATCH
OV
Latch Bypass Input/Clear Pin. When pulled high, the OV latch is cleared. When held high, the OV output has the
same delay and output characteristics as the UV output. When pulled low, the OV output is latched when asserted.
14 SEL
Input Polarity Select. This three-state input pin allows the polarity of VH3, VL3, VH4, and VL4 to be configured.
Connect to V
CC
or GND, or leave open to select one of three possible input polarity configurations.
15 TIMER
Adjustable Reset Delay Timer. Connect an external capacitor to the TIMER pin to program the reset timeout delay.
Refer to Figure 14 in the Typical Performance Characteristics section. Connect this pin to V
CC
to bypass the timer.
16 V
CC
Supply Voltage. V
CC
operates as a direct supply for voltages up to 6 V. For voltages greater than 6 V, it operates as a
shunt regulator. A dropper resistor must be used in this configuration to limit the current to less than 10 mA. When
used without the resistor, the voltage at this pin must not exceed 6 V. A 0.1 μF bypass capacitor or greater should
be used.
