M-88L70 CLARE [Clare, Inc.], M-88L70 Datasheet - Page 5

• Manufacturer Part Number: M-88L70
• Description: 3V DTMF Receiver
• Manufacturer: CLARE [Clare, Inc.]

Table 6 AC Characteristics
Rev. 1
Table 5 Operating Characteristics - Gain Setting Amplifier
PARAMETER
Valid input signal levels
(each tone of composite signal)
Positive twist accept
Negative twist accept
Frequency deviation accept limit
Frequency deviation reject limit
Third tone tolerance
Noise tolerance
Dial tone tolerance
Tone present detection time
Tone absent detection time
Minimum tone duration accept
Maximum tone duration reject
Minimum interdigit pause accept
Maximum interdigit pause reject
Propagation delay (St to Q)
Propagation delay (St to StD)
Output data setup (Q to StD)
Propagation delay (OE to Q), enable
Propagation delay (OE to Q), disable
Crystal clock frequency
Clock output (OSC2), capacitive load
All voltages referenced to VSS unless otherwise noted. For typical values V
1. dBm = decibels above or below a reference power of 1 mW into a 600
2. Digit sequence consists of all 16 DTMF tones.
3. Tone duration = 40 ms. Tone pause = 40 ms.
4. Nominal DTMF frequencies are used, measured at GS.
5. Both tones in the composite signal have an equal amplitude.
6. Bandwidth limited (0 to 3 kHz) Gaussian noise.
7. The precise dial tone frequencies are (350 and 440 Hz) ± 2%.
8. For an error rate of better than 1 in 10,000.
9. Referenced to lowest level frequency component in DTMF signal.
10. Minimum signal acceptance level is measured with specified maximum frequency deviation.
11. Input pins defined as IN+, IN-, and OE.
12. External voltage source used to bias VREF.
13. This parameter also applies to a third tone injected onto the power supply.
14. Referenced to Figure 4. Input DTMF tone level at -28 dBm.
PARAMETER
Input leakage current
Input resistance
Input offset voltage
Power supply rejection
Common mode rejection
DC open loop voltage gain
Open loop unity gain bandwidth
Output voltage swing
Tolerable capacitive load (GS)
Tolerable resistive load (GS)
Common mode range
All voltages referenced to V
SS
unless otherwise noted. V
DD
= 3.0 V +20%/-10%, V
SYMBOL
SYMBOL
CMRR
PSRR
A
V
V
t
t
R
t
t
t
t
f
V
R
C
C
t
t
t
t
PStD
QStD
I
f
VOL
REC
REC
t
PTE
PTD
CLK
CM
OS
DP
DA
DO
PQ
N
C
IN
-
-
-
-
-
-
-
-
-
ID
O
LO
L
L
DD
load.
= 3.0 V, V
SS
= 0 V, TA = -40˚C to + +85˚C
3.5759
±3.5%
SS
12.3
MIN
-36
www.clare.com
0.5
MIN
20
20
0.3
5
= 0 V, T
50
40
32
50
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
A
= -40˚C to +85˚C, f
3.5795
TYP
100
TYP
1.0
2.2
1.5
+22
200
500
-16
-12
10
15
60
60
65
3.4
13
-
-
8
3
8
-
-
-
-
-
-
-
-
-
-
-
CLK
1.5% ±2 Hz
= 3.579545 MHz.
3.5831
MAX
-6.4
370
8.5
MAX
14
40
40
30
100
6
6
-
-
-
-
-
-
-
-
-
-
-
25
-
-
-
-
-
-
-
-
-
mVRMS
UNITS
UNITS
Notes:
V
MHz
Nom.
Nom.
V
M
dBm
MHz
mV
k
nA
dB
dB
dB
pF
ms
ms
ms
ms
ms
ms
dB
dB
dB
dB
dB
ns
ns
pF
P-P
P-P
s
s
s
User adjustable (see Figures 3
R
RL 3 100 k
TEST CONDITIONS
L
-3.0V < V
2,3,4,5,8,9,13,14
= 10k , CL = 50 pF
V
and Figure 5)
2,3,4,5,6,8,9
2,3,4,5,7,8,9
See Figure 8
SS
1,2,3,4,5,8
2,3,5,8,10
OE = V
No load
< V
NOTES
1 kHz
2,3,5
IN
IN
< V
DD
< 3.0V
M-88L70
to V
DD
SS
5