U3761MB-T ATMEL [ATMEL Corporation], U3761MB-T Datasheet - Page 22

• Manufacturer Part Number: U3761MB-T
• Description: Universal Telephone IC - All Functions Integrated
• Manufacturer: ATMEL [ATMEL Corporation]

DC Characteristics Dialer (Continued)
V
AC Characteristics Dialer
V
22
Parameters
Keypad active in debounce mode
Key release debounce
Pre-digit pause
Inter-digit pause (auto dialing)
Make/break ratio
DTMF output duration
Inter-tone pause
Flash break time
F1
F2
F3
Rise time of leading edge at HKS
Flash pause time
Pause time
On-hook debounce time
Earth time
Earth pause time
Break duration
Make duration
Break + make duration
Parameters
Isolation resistance XT/XT
Maximum voltage at HKS
Maximum input current at HKS
DD
DD
= 2.7 V, f
= 2.7 V, f
U3761MB-T
OSC
OSC
= 3.58 MHz, all outputs unloaded, S9 closed; HKS = 1
= 3.58 MHz, all outputs unloaded, S9 closed; HKS = 1
Test Conditions
MODE pin = R3 (10 pps)
MODE pin = C1, C4 (10 pps)
MODE pin = R1 (20 pps)
MODE pin = R2
10 pps, t
20 pps
MODE pin = R1 (20 pps), R3 10 pps)
MODE pin = C1, R4 (10 pps) R2
(20 pps)
Auto dialing, MODE = C4
Auto dialing, MODE = C4
C
C
C
20 to 70% of VDD
F1, F2, F3
C
MODE pin = R3
MODE pin = C1, R4
MODE pin = R1 (20 pps)
MODE pin = R2
MODE pin = R3
MODE pin = C1, R4
MODE pin = R1 (20 pps)
MODE pin = R2
MODE pin = C1, R3, R4
MODE pin = R1, R2 (20 pps)
Test Conditions
1
2
3
4
connected to GND
connected to GND
connected to GND
connected to GND
IP
= t
MODE = C3
MODE = C3
IDP
+ t
PDP
Symbol
Symbol
Riso
t
t
M/B
t
t
t
t
t
t
rHKS
t
KRD
PDP
PDP
PDP
PDP
t
t
t
KID
t
t
ohd
t
t
t
t
ITP
t
t
t
t
t
TD
FB
FP
IP
IP
et
pt
M
P
B
B
M
P
P
40.8:60.2
35.6:64.4
Min.
Min.
57.6
810
135
245
590
145
4.7
0.9
3.5
0.9
15
15
37
31
84
84
84
95
63
38
31
95
16.65
40:60
33:67
33.35
16.65
Typ.
Typ.
33.3
66.7
33.3
836
512
140
250
604
165
604
100
3.6
20
20
40
20
87
87
87
98
60
30
40
20
50
1
1
39.2:60.8
31.2:68.8
Max.
Max.
33.5
62.4
860
147
101
255
610
185
105
5.5
0.5
1.1
3.7
1.1
25
25
41
90
90
90
10
69
41
35
4744A–CORD–09/03
Unit
Unit
M W
mA
ms
ms
ms
ms
ms
ms
ms
ms
ms
ms
ms
ms
ms
ms
ms
ms
ms
ms
ms
ms
ms
ms
ms
ms
ms
ms
%
%
V
s
s
s