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參數(shù)資料
| 型號： | SA589 |
| 廠商： | SAMES |
| 英文描述： | LD/DTMF SWITCHABLE DIALLERS WITH DEDICATED KEYS FOR 20 MEMORIES |
| 中文描述： | 勞工處/雙音多頻撥號器可切換20個記憶諾基亞N93 |
| 文件頁數(shù)： | 2/14頁 |
| 文件大小： | 94K |
| 代理商： | SA589 |
SA589 FAMILY
sames
2/14
Pin
Pin
name
NC
IMP
SELECT
MASK
number
1
3
4
5
Not connected
'Loop disconnect' dialling output
LD/DTMF selection, IDP and B/M ratio programming
Output to disable speech circuit during pulse dialling and recall
(see note 1)
Connections for 560kHz ceramic resonator
6
7
8
9
10
OSC OUT
OSC IN
FILT IN
FILT OUT
HSW
Hook'
V
SS
V
PAUSE OUT
MF OUT
MUTE
COL1
COL2
COL3
COL4
COL5
COL6
COL7
ROW1
ROW2
ROW3
ROW4
ROW 5
ROW 6
ROW 7
Unity gain amplifier input and output for DTMF tone filtering
Hookswitch input - a logic 1 at this pin is used to indicate 'Off-
11
12
13
17
18
19
20
21
26
27
2
16
22
23
24
25
14
15
28
Negative supply
Positive supply
Active high indicating a pause when dialling from memory
Unfiltered DTMF output
Output active during keying and tone transmission (see note 2)
Connections for 38 key single contact keypad
1.
MASK may be used to disconnect the whole speech circuit in order to maintain the break
condition whilst on-hook and during a TBR (Timed Flash) operation.
MUTE is provided to disable the microphone while maintaining the loop during DTMF
transmission.
2.
OPERATION
Power-on
When power is applied to the chip, a power-on reset circuit operates and ensures that the
Memories are cleared and all logic is reset. The power-on reset circuit is designed such that
if the chip supply voltage drops to a level at which the memories may be corrupted, it will
always, under all conditions, clear the memory, so that corrupt data is not retained.
Function
TABLE 1: PIN FUNCTIONS
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