CD22859 Datasheet, PDF (3/5 Pages) Intersil Corporation – Monolithic Silicon COS/MOS Dual-Tone Multifrequency Tone Generator

CD22859
Electrical Specifications T_A = -25^oC to 60^oC (Continued)
PARAMETER
STATIC MUTE OUTPUT CURRENT
V_DD (V)
V_O (V)
MIN
MAX
UNITS
Transmitter
1.7
1.2
-0.5
-
mA
I_OH (Source)
I_OL (Sink)
Receiver
10
9.5
-3.4
10
2.5
-
1.7
1.2
-0.5
-
mA
10
µA
-
mA
I_OH (Source)
10
9.5
-3.4
-
mA
I_OL (Sink)
10
2.5
-
10
µA
NOTES:
1. All logic and counters functional.
2. Mute switches remain open.
3. Two or more row inputs low and one column input low.
4. Two or more column inputs low and one row input low.
5. Distortion is defined as: The ratio of all extraneous frequency components generated in the voiceband 0.5kHz to 3kHz, to the power of the dual-
tone signal, measure across R_L.
Distortion=-----⁽--^V----¹----²-----+-----^V----²---²-----+-----^.--^.--^.---+-----^V-----ⁿ---²----^{) ,}
V_L2 + V_H2
where V₁, V₂ . . . . V_n are extraneous frequency components in the voiceband 0.5kHz to 3kHz, V_L is the low-band frequency tone, and V_H is
the high-band frequency tone.
6. Tone rise time is defined as the time for each of the 2 DTMF frequencies to attain 90% of full amplitude, measured from the time when a row
and column signal are driven low.
7. Pre-emphasis is the ratio of the high-group level to the low-group level.
8. Refer to Figure 1 for standard DTMF frequencies.
9. Corresponds to normal dual-tone operation.
10. Corresponds to single-tone generation mode.
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