TMA Datasheet, PDF (1/2 Pages) TAITRON Components Incorporated – Axial Ceramic Monolithic Capacitor

SYNCHRONOUS TIMING MODULES
TMA SERIES SYNCHRONOUS TIMING MODULES
8kHz to 77.760MHz Inputs, up to 77.760MHz CMOS output
DESCRIPTION
TMA (Synchronous Timing Module, model A) parts serve as a frequency
translator in telecommunications systems. The device translates any CMOS
input reference frequencies (8, 16, 32, 64kHz up to 77.760MHz) into
jitter-attenuated, phase locked reference synchronized output frequencies
up to 77.760MHz.
OUTLINES & DIMENSIONS
Page 1 of 2
FEATURES
Loss of Reference (LOR) and Loss of Lock (LOL) active alarms.
Continuous input reference monitoring of external references.
Automatic FREE RUN mode on Loss Of Reference (LOR)
±15ppm output accuracy guaranteed.
Manually forced FREE-RUN mode by software control.
Tristate (output high impedance) for external testing.
+3.3V leadframe package, current <80mA.
1 second acquisition time
GENERAL SPECIFICATION
Input Reference Frequency:
Output Frequency:
Supply Voltage:
Current Consumption:
Input Jitter Tolerance:
Acquisition Time:
Capture/Pull-in Range:
Input Logic:
Output Logic:
Duty Cycle:
Rise and Fall Times:
Free Run Accuracy:
Jitter at 77.760MHz:
Operating Temperature Range
COMMERCIAL:
INDUSTRIAL:
8, 16, 32 or 64kHz or <77.76MHz
Selectable by SELA & SELB pads
from 1.544MHz to 77.760MHz
+3.3 Volts ±5%
Less than 80mA
2us at 10Hz
1 second
±40ppm
CMOS
CMOS
40%60% at 50% level
2ns (20%~80% output levels)
±15ppm maximum
7.5ps RMS typ. at 10Hz~1MHz
12kHz to 20MHz bandwidth
0°~+70°C (Code ‘C’)
-40°~+85°C (Code ‘I’)
ABSOLUTE MAXIMUM RATINGS
Symbol
Vcc
Vin
Tstg
Tref
Description
Supply Voltage relative to ground
Input Voltage relative to ground
Storage Temperature (Ambient)
Maximum reflow Temperature
Rating
-0.5V to 4.0V
-0.5V to 5.5V
-65° to +150°C
240°C
PAD CONNECTIONS
Pad No. Pad Name
1
REF OP
2
NC
3
NC
4
GND
5
FREE RUN
6
LOR
7
LOL
8
REFIN
9
OUTPUT
10
E/D
11
VCC
12
TDO
13
SEL A
14
SEL B
Description of Function
Reference Output
Do not connect - factory use only
Do not connect - factory use only
Ground
Control input to force FREE RUN
Logic 1 indicates Loss Of Reference
Logic 1 indicates Loss Of Lock
Reference input
VCXO output
Enable/Disable output
Supply Votage
Do not connect - factory use only
Second bit reference frequency selection
First bit reference frequency selection
FUNCTIONAL BLOCK DIAGRAM
PART NUMBERS
Part numbers are generated according to this scheme:
Supply
Voltage
Package
Type
Operating
Temperature
Range
Input
Frequency
Output
Frequency
“3” for +3.3 V TMA20
“C”=0°~+70°C
“I”=-40°~+85°C
Add “k”
for kHz
Output
Frequency
in MHz
EXAMPLE: 3TMA20-C-8K-77.760
Representing: +3.3V supply, TMA package, Commercial operating
temperature range, 8kHz input frequency and output frequency of
77.760MHz.
EUROQUARTZ LIMITED Blacknell Lane CREWKERNE Somerset UK TA18 7HE
Tel: [phone] Fax: [phone] email: [e-mail] web: www.euroquartz.co.uk