PRELIMINARY
DS76KHz
76.8 kHz TCXO
www.dalsemi.com
FEATURES
Accurate to
鹵7.5
ppm (-40擄C to +85擄C)
Accurate to
鹵2
ppm (0擄C to 40擄C)
Battery back up for continuous output
V
BAT
operating voltage 2.7 to 5.5 volts (with
V
CC
grounded)
V
CC
operating voltage 4.5 to 5.5 volts
Operating temperature range:
COM: 0擄C to 70擄C
IND: -40擄C to +85擄C
No calibration required
Low power consumption
Surface mountable
V
CC
:
V
BAT
:
76KHz:
GND:
C2, C3, D2, D3
A4, A5, B4, B5
C4, C5, D4, D5
All Remaining Balls
PIN ASSIGNMENT
A
1
2
3
4
5
6
7
8
9
B
C
D
DS76KHz 36-Pin SMD
(TOP VIEW)
DESCRIPTION
The DS76KHz is a temperature-compensated crystal oscillator (TCXO) with an output frequency of 76.8
kHz. This device is available in commercial and industrial temperature versions, DS76KHz and
DS76KHz-N respectively.
The DS76KHz requires four pins for operation: V
CC
, GND, V
BAT
and 76KHz OUT. See Figures 1, 2 and
3 for connection schemes. Power is applied via V
CC
and GND, while V
BAT
is used to maintain the 76KHz
output in the absence of power. The output is accurate to
鹵7.5
ppm from -40擄C to +85擄C and
鹵2
ppm
from 0擄C to 40擄C.
The DS76KHz is packaged in a small 36-pin SMD, utilizing Ball Grid Array (BGA) technology, with
dimensions 0.400 inches wide, 0.450 inches long, and 0.180 inches high.
The recommended land pattern layout is shown on page 5.
The additional board space required is negligible in most applications and therefore the recommended
land pattern layout should be implemented on all new designs and future board revisions to satisfy
applications requiring better accuracy.
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