QT2024L
Q-TECH
CORPORATION
CMOS, LOW CURRENT HIGH-TEMPERATURE REAL TIME CLOCK
I
2
C SERIAL BUS INTERFACE
3.3Vdc
The QT2024 is an I
2
C-bus serial interface conforming, high-
precision real-time clock (RTC) IC with a built-in 32.768kHz
crystal oscillator circuit. In addition to clock and calendar
functions, it is equipped with an alarm interrupt function,
fixed-cycle timer interrupt function, time update interrupt
function, clock output function, and supply voltage detection
function.
Description
Features
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Made in the USA
ECCN: EAR99
+3.3Vdc operation
32.768kHz square wave output
Wide operating temperature (-55°C to +185°C)
Very good stability
Low current 90µA at +25°C
I
2
C-bus serial interface corresponding to fast data transfer:
400kHz fast-mode compatible.
Clock function: hour, minute, second
Calendar function with auto leap year adjustment: year,
month, day,day of week
Alarm interrupt function: day day of week, hour, minute
Low minimum Standby (Timekeeping) Voltage at 2.2V
Buffered Clock Output
Three Independent Interrupt Modes
- Alarm
- Fix-cycle timer
- Time update
Electrical Parameters
Parameters
Output freq. (Fo)
Supply voltage (Vdd)
Maximum Applied Voltage
(Vdd max.)
Freq. stability (∆F/∆T)
Storage temp. (Tsto)
Operating temp. (Topr)
Operating supply current
(Idd) (No Load)
Rating
32.768kHz
+5Vdc
3.3Vdc ± 10%
See Option codes
See Option codes
65µA Typ. at 25ºC
90µA max, VDD = 3.3Vdc,
70µA max, VBdATT = 2.3Vdc
20 ns typ.
70 ns max.
(Measured from 10% to 90%)
15pF // 10kΩ
10ms max.
45/55% max.
-62ºC to + 150ºC
Symmetry
(50% of ouput waveform )
Rise and Fall times (Tr/Tf)
(with typical load)
Output Load
Start-up time (Tstup)
Output voltage (Voh/Vol)
Output Current (Ioh/Iol)
Voh = 2.2Vdc min.
Vol = 0.8V max.
± 1mA min.
Applications
• Data logging
• Real Time Clock functions
QPDS-0103 (Revision A, June 2015 ECO #11540)
Q-TECH Corporation - 10150 W. Jefferson Boulevard, Culver City 90232 - Tel: 310-836-7900 - Fax: 310-836-2157 - www.q-te ch.com
1 of 11
QT2024L
Q-TECH
CORPORATION
CMOS, LOW CURRENT HIGH-TEMPERATURE REAL TIME CLOCK
I
2
C SERIAL BUS INTERFACE
3.3Vdc
Package Outline and Pin Connections
Dimensions are in inches (mm)
Pin
Pin Name
No.
Description
1
2
3
4
5
6
7
8
CLKOE
INTN
N/C
CLKOUT output control enable input pin
(clock output when HIGH, Hi-Z when LOW).
1Hz signal, alarm interrupt signal, fixed-cycle
timer interrupt and time update interrupt signal,
N-channel open-drain output.
No connection
Ground pin : Connect this pin to ground
I
2
C-bus serial interface clock input.
CLKOUT
SCL
GND
Clock output (CMOS output with output state
controlled by CLKOE.
I
2
C-bus serial interface daqta input/output (Ad-
dress, data and acknowledge bit input/output, in
sync with the SCL clock input. N-channel
open-drain output.)
The positive power-supply pin: Connect this
pin to the power supply
SDA
VDD
• Package material (header and leads): Kovar
• Lead finish: Gold Plated – 50µ ~ 80µ inches
Nickel Underplate – 100µ ~ 250µ inches
• Package to lid attachment: Resistance weld
• Cover: Pure Nickel Grade A or Stainless Steel
• Weight: 3.4g typ.,14.2g max.
Package Information
QPDS-0103 (Revision A, June 2015 ECO #11540)
Q-TECH Corporation - 10150 W. Jefferson Boulevard, Culver City 90232 - Tel: 310-836-7900 - Fax: 310-836-2157 - www.q-te ch.com
2 of 11
QT2024L
Q-TECH
CORPORATION
CMOS, LOW CURRENT HIGH-TEMPERATURE REAL TIME CLOCK
I
2
C SERIAL BUS INTERFACE
3.3Vdc
Ordering Information
Q T 20 24C8 M-3 2. 768 kHz
Q T 2024 L 80 M - 32 .76 8kHz
Solder Dip Option:
T = Standard
S = Solder Dip
(*)
G = Solder Dip
(*)
Part Number
Logic & Supply Voltage:
L = LVHCMOS +3.3V
80
81
82
83
84
85
86
87
88
89
90
91
92
=
=
=
=
=
=
=
=
=
=
=
=
=
±40ppm
±75ppm
±40ppm
±75ppm
±75ppm
±75ppm
±100ppm
±150ppm
±200ppm
±250ppm
±200ppm
±250ppm
±250ppm
Output Frequency
(Sample part number)
Screening Option:
Blank = No Screening
M
= Per MIL-PRF-55310, Level B
Operating Temperature Option:
@ 0ºC to +175ºC (Operable up to + 185ºC)
@ 0ºC to +175ºC (Operable up to + 185ºC)
@ -20ºC to +175ºC (Operable up to + 185ºC)
@ -20ºC to +175ºC (Operable up to + 185ºC)
@ 0ºC to +185ºC
@ -20ºC to +185ºC
@ -20ºC to +185ºC
@ -20ºC to +185ºC
@ -20ºC to +175ºC (Operable up to + 185ºC)
@ -40ºC to +175ºC (Operable up to + 185ºC)
@ -40ºC to +185ºC
@ -40ºC to +185ºC
@ -55ºC to +185ºC
For Non-Standard requirements,
contact Q-Tech Corporation
at Sales@Q-Tech.com
• Standard packaging in black foam
• Optional anti-static plastic tube
Packaging Options
(*) Hot Solder Dip options for an additional cost:
S = Sn60/Pb40 per MIL-PRF 55310
G = Lead free Alloy SAC305 (96.5% Sn, 3% Ag, 0.5% Cu)
QPDS-0103 (Revision A, June 2015 ECO #11540)
Q-TECH Corporation - 10150 W. Jefferson Boulevard, Culver City 90232 - Tel: 310-836-7900 - Fax: 310-836-2157 - www.q-te ch.com
• Lead forming available. Please contact for details.
• Lead trimming
• P. I. N. D. test (MIL-STD 883, Method 2020)
Other Options Available For An Additional Charge
3 of 11
QT2024L
Q-TECH
CORPORATION
CMOS, LOW CURRENT HIGH-TEMPERATURE REAL TIME CLOCK
I
2
C SERIAL BUS INTERFACE
3.3Vdc
Output Waveform (Typical)
Startup Time
Chart vs. Nominal
QPDS-0103 (Revision A, June 2015 ECO #11540)
Q-TECH Corporation - 10150 W. Jefferson Boulevard, Culver City 90232 - Tel: 310-836-7900 - Fax: 310-836-2157 - www.q-te ch.com
4 of 11
QT2024L
Q-TECH
CORPORATION
CMOS, LOW CURRENT HIGH-TEMPERATURE REAL TIME CLOCK
I
2
C SERIAL BUS INTERFACE
3.3Vdc
QPDS-0103 (Revision A, June 2015 ECO #11540)
Q-TECH Corporation - 10150 W. Jefferson Boulevard, Culver City 90232 - Tel: 310-836-7900 - Fax: 310-836-2157 - www.q-te ch.com
5 of 11
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