ME83 Datasheet, PDF (5/5 Pages) Mercury United Electronics Inc – Frequency reference for real time clocks

Low Power (nA Current Consumption) 32.768 KHz
ME831, ME832, ME833, ME834 Series
TCXOs
MERCURY
Since 1973
Part Number Format:
Example: 18ME834-32768
: Customer to specify



18
ME83
4
—
32768



dash

 Supply voltage code: “18” for +1.8V; “25” for +2.5V, “3” for +3.0V, “33” for “+3.3V, “5” for +5.0V
 Product series: ME83  Product series: 1, 2, 3 or 4 depends on temperature measurement period.
 Frequency in Hz: 32768 Hz.
Orderable Part
Numbers
xxME83y-1/60
xxME83y-1/10
xxME83y-1
xxME83y-32
xxME83y-128
xxME83y-1024
xxME83y-4096
xxME83y-32768
Output
Frequency
1/60 Hz
1/10 Hz
1 Hz
32 Hz
128 Hz
1024 Hz
4096 Hz
32768 Hz
Supply Voltage Codes
xx=18: V_DD is 1.8V
xx=25: V_DD is 2.5V
xx=3: V_DD is 3.0V
xx=33: V_DD is 3.3V
xx=5: V_DD is 5.0V
xx can be custom
Product codes / Temperature
Measurement Time
ME831 (1 min.). y= 1
ME832 (2 min.) y= 2
ME833 (30 sec.) y= 3
ME834 (4 min.) y= 4
Recommended Solder Reflow Profile (per IPC/JEDEC J-STD-020D.1)
T_p
T_L
Tsmax
Tsmin
Max. Ramp Up Rate=3°C/s
Max. Ramp Down Rate=6°C/s
Preheat Area
ts
tp
Tc-5°C
t_L
Tc
Tc-5°C
User Tp≤Tc
User tp
25
Time 25°C to Peak
Time
Profile Feature
Sn-Pb Eutectic Assembly
Preheat/Soak
- Temperature min. (Ts min.)
100⁰C
- Temperature max. (Ts max.)
150⁰C
- Time (ts) (Ts min. to Ts max.)
60 to 120 seconds
Ramp-up rate (T_L to Tp)
Liquidous temperature (T_L )
Time (t_L) maintained above T_L
Peak package body temperature (Tp)
3⁰C / sec. max.
183⁰C
60 to 150 seconds
235⁰C
Time (Tp) within 5⁰C of the classification temperature Tc 10 to 30 seconds
Ramp-down rate (Tp to T_L)
Time 25⁰C to peak temperature
6⁰C / second max.
6 minutes max.
All temperatures refer to topside of the package, measured on the package body surface.
Pb-free Assembly
150⁰C
200⁰C
60 to 180 seconds
3⁰C / sec. max.
217⁰C
60 to 150 seconds
260⁰C
20 to 40 seconds
6⁰C / second max.
8 minutes max.
MERCURY
Page 5 of 5
Date: June 30, 2014
Revision: 6