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參數(shù)資料
型號: W6690
廠商: WINBOND ELECTRONICS CORP
英文描述: ISDN S/T Interface Controller(ISDN S/T接口控制器)
中文描述: 綜合業(yè)務(wù)數(shù)字網(wǎng)的S / T接口控制器(綜合業(yè)務(wù)數(shù)字網(wǎng)S / T的接口控制器)
文件頁數(shù): 10/76頁
文件大小: 471K
代理商: W6690
Preliminary W6690
- 10 -
4. Pin Description, continued
PIN NAME PLCC-68 QFP-100
TYPE
DESCRIPTIONS
PBCK
54
68
O
PCM bit synchronization clock of 1.536 MHz
PTXD
56
70
O, 4 mA PCM transmit data output with 64 kbit/s per port
PRXD
57
71
I
PCM receive data input with 64 kbit/s per port
EPCS
58
72
O,4 mA Serial EEPROM chip select. This signal is active HIGH.
EPSK
59
73
O,4 mA Serial EEPROM serial data clock. The frequency is
below 250 KHz.
EPSD
60
74
I/O,
4 mA
Serial EEPROM serial data input/output.
V
DD
12, 36, 52 9, 41, 66
I
Digital power supply (5V
±
5 %)
Analog power supply (5V
±
5 %)
Digital ground
V
DDA
45
59
I
V
SSD
13, 37, 53 10, 42, 67
I
V
SSA
42
47
I
Analog ground
NC
-
1
6,
24
31,
49
57,
75
82,
100
Not connected
5. SYSTEM DIAGRAM AND APPLICATIONS
Typical Applications include:
Highly suitable for ISDN Internet ISA passive S-Card
ISDN Internet active S-Card
ISDN TA
The all-in-one characteristic of W6690 makes it excellent for ISDN Internet-access passive card
applications. The booming home PC market and powerful CPU capability make it possible to make a
very low-cost ISDN Internet access card by using CPU's computing power and user friendly PnP ISA
interface. W6690 is designed for this type of scenario. W6690 integrates three HDLC controllers in
the chip and interfaces to ISA bus directly. All the commodities needed on the card can be reduced
to a one W6690, one crystal, front end transformers and protection circuits, and an optional PCM
codec if voice service is required.
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