CLARE M-993 Datasheet
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DS-M993-R1
M-993
Region 1 MF Tone Generator
1
Block Diagram
Pin Diagram
Ordering Information
Part # Description
M-993 14-pin plastic DIP
Features
• Generates standard CCITT R1 MF tones
• Digital input control
• Linear (analog) output
• Power output capable of driving standard line
• 14-pin DIP
• Single 5-Volt supply
• Inexpensive 3.58 MHz time base
Applications
• Telephone systems
• Test equipment
Description
The M-993 is a monolithic CMOS integrated circuit
designed to generate multifrequency (MF) tone pairs
for use in trunk signaling. The tones generated conform to CCITT R1 signal recommendations and to
AT&T MF standards. The M-993 permits design engineers to implement a highly accurate MF sender with
a minimum of space, power, and added components.
The accuracy of the tone frequencies is assured
through use of an easily obtained 3.58 MHz color burst
crystal or an external 3.58 MHz clock source.
Specifications
Parameter Min Typ Max Units Notes
Power Supply V
DD
4.75 - 5.25 V 1
and Reference Current Drain, IDD - 2.0/4.0 - mA 8
V
REF
PIN:
Voltage 48% of V
DD
- 52% of V
DD
%-
Internal Resistance from V
REF
to VDD, V
SS
3.25 - 6.75 kΩ -
Oscillator Frequency Deviation -0.01 - +0.01 % 7
External CLock: (X
OUT
open)
V
IL
0 - 0.2 V -
V
IH
VDD- 0.2 - V
DD
VDuty Cycle 40 - 60 % XIN, X
OUT
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Capacitance - - 10 pF 9
Resistance 20 - - MΩ -
Tone Output Frequency Deviation -1.5 - 1.5 % -
Level 110 - 180 mV 2
Distorting Components -35 - - dB 2, 3
Idle - - -60 dBm 4
OUTDRIVE Envelope Rise Time - - 4 ms 5
Control DX, CE Pins:
V
IL
- - 0.5 V 6
V
IH
2.5 - - V Mute Pins:
VOL (ISINK = -100 µA) - - 1.5 V VOH (ISOURCE = 100 µA) VDD- 1.5 - - V -
Timing Data Setup (t
DSRT
) 200 - - ns 10
Data Hold (tDH)10--nsChip Enable Fall (tPL)--90nsTone On Delay (tTO)5--msTone Off Delay (tTD)5--msMute Delay from Outdrive (tMO) - - 200 ns -
Unless otherwise noted, VDD- VSS= 5 VDC, Ta - 25° C
Notes:
1. All DC voltages are referenced to V
SS
.
2. Vrms per tone, 540W load.
3. Any one frequency relative to the lowest level output tone (f<4000 Hz).
4. 0 dBm = 0.775 Vrms.
5. To 90% maximum amplitude.
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2
M-993
Rev. 1
Absolute Maximum Ratings
Storage Temperature -55 to 125°C
Operating Ambient Temperature -25 to 70°C
V
DD
7.0V
Any Input Voltage VSS- 0.6 to VDD+ 0.6V
Note:
1. Exceeding these ratings may permanently damage the M-993.
Absolute Maximum Ratings are stress ratings. Stresses in
excess of these ratings can cause permanent damage to
the device. Functional operation of the device at these or
any other conditions beyond those indicated in the operational sections of this data sheet is not implied. Exposure of
the device to the absolute maximum ratings for an extended period may degrade the device and effect its reliability.
6. For all supply voltages in the operating range.
7. At XOUT pin as compared to 3.579545 MHz.
8. OUTDRIVE with load >5 KW/OUTDRIVE with 540W load.
9. Crystal oscillator active.
10. Measured 90% to 10%.
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