ES51964(6600counts)
Dual Display
50
51
52
53
54
LPFC2
LPFC3
LPFOUT
SLEEP
VBAR
O
O
O
O
I
Capacitor C2 connection for internal low-pass filter
Capacitor C3 connection for internal low-pass filter
Capacitor C1 connection for internal low-pass filter
Sleep mode indicator, asserts low in SLEEP mode.
In temperature mode, it is used to control decimal point.
In µA or mA modes, it is used to control the ‘µ’ or ‘m’ sign.
Pull to V- to enable the BUZOUT.
Frequency counter input, offset V-/2 internally by the chip.
LCD segment line 01 – 34
LCD backplane 4
LCD backplane 3
LCD backplane 2
LCD backplane 1
Square wave output at the backplane frequency, synchronized to BP1.
ANNUNC can be used to control display annunciator. Connect a
LCD segment to ANNUNC to turn it on; connect an LCD segment to
its backplane to turn it off.
55
56
BUZIN
FREQ
I
I
59 - 92 SEG34 – SEG01
O
O
O
O
O
O
93
94
95
96
97
BP4
BP3
BP2
BP1
ANNUNC
98
99
100
101
102
LCDCAP
HOLD
RANGE
REL_ZERO
KEY
I
I
I
I
I
LCD bias voltage bypass capacitor
Pulse to V- to enable HOLD function.
Pulse to V- to enable manual mode and manual range selection.
Pulse to V- to enable Relative function or Zero function.
Pulse to V- to change mode. In ADP mode, if this pin is connected to
V-, the buzzer output will be off when the ADP input overflows.
Pulse to V- to enable MAX/MIN function.
103
104
105
106
107
MAX/MIN
NC
BKLIT
RS232
I
-
I
I
O
Back light function. Pulse low to set BKOUT pin output.
Assert low to enable serial data output.
Outputs a 2KHz audio frequency signal for driving piezoelectric
buzzer when BUZIN is low.
BUZOUT
108
BKOUT
O
If BKLIT function is enabled, this pin will change from V- to V+
For 60 sec, once press BKLIT pin again within 60 sec, this pin will
Change back to V-.
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
OSC2
OSC1
SHIFT
APOSEL
VST
LPFOFF
CESEL
FC5
O
I
I
I
I
I
I
I
I
I
I
I
I
O
O
O
I
Crystal oscillator output connection
Crystal oscillator input connection
Pull to V- to enable display-shift feature on duty cycle mode
Idle time selection for auto power off feature.
Pull to V- to enable the auto range voltage mode to start from 660.0V
Pull to V- to disable the internal Low pass filter in measurement
CE selection feature control pin.
Switch 5 for function selection.
Switch 4 for function selection.
Switch 3 for function selection.
Switch 2 for function selection.
Switch 1 for function selection.
Select initial state.
Serial data output
Positive capacitor connection for on-chip DC-DC converter.
Negative capacitor connection for on-chip DC-DC converter.
Low battery configuration input. If battery is used, the low battery
segment is displayed when the voltage of this pin is less than VRH
(-1.23V)
FC4
FC3
FC2
FC1
SLACDC
SDO
C+
C-
LBAT9
126
127
128
V-
V-
V+
P
P
O
Negative supply voltage.
Negative supply voltage.
Output of on-chip DC-DC converter.
v2.5
4
09/04/14
CYRUSTEK [ Cyrustek corporation ]
