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参数资料
| 型号： | LTC1323CS |
| 厂商： | LINEAR TECHNOLOGY CORP |
| 元件分类： | 通用总线功能 |
| 英文描述： | Single 5V AppleTalk Transceiver |
| 中文描述： | LINE TRANSCEIVER, PDSO16 |
| 封装： | 0.150 INCH, PLASTIC, SO-16 |
| 文件页数： | 6/12页 |
| 文件大小： | 284K |
| 代理商： | LTC1323CS |
6
LTC1323
PI FU
U
LTC1323CSW
C1
+
:
C1 Positive Input. Connect a 0.33
μ
F capacitor be-
tween C1
+
and C1
–
.
C1
–
:
C1 Negative Input. Connect a 0.33
μ
F capacitor be-
tween C1
+
and C1
–
.
CPEN:
TTL Level Charge Pump Enable Input. With CPEN
held low, the charge pump is enabled and the chip oper-
ates normally. When CPEN is pulled high, the charge
pump is disabled as well as both drivers, the noninverting
single-ended receiver, and the differential receiver. The
inverting single-ended receiver (RXI) is kept
alive to
monitor the control line and I
CC
drops to 65
μ
A. To turn
off the receiver and drop I
CC
to 0.5
μ
A, pull the SHDN pin
high.
TXD:
Differential Driver Input (TTL compatible).
TXI:
Single-Ended Driver Input (TTL compatible).
TXDEN:
Differential Driver Output Enable (TTL compat-
ible). A high level on this pin forces the differential driver
into three-state; a low level enables the driver. This input
does not affect the single-ended driver.
SHDN:
Shutdown Input (TTL compatible). When this pin
is high, the chip is shut down. All driver and receiver
outputs are three-state, the charge pump turns off, and the
supply current drops to 0.5
μ
A. A low level on this pin
allows normal operation.
RXEN:
Receiver Enable (TTL compatible). A high level
on this pin disables the receivers and three-states the
logic outputs; a low level allows normal operation.
RXO:
Inverting Single-Ended Receiver Output. Remains
active in the receiver keep-alive mode.
RXO:
Noninverting Single-Ended Receiver Output.
RXDO:
Differential Receiver Output.
GND:
Signal Ground. Connect to PGND with 24-pin
package.
PGND:
Power ground is connected internally to the charge
pump and differential driver. Connect to the GND pin.
RXD
+
:
Differential Receiver Noninverting Input. When this
pin is
≥
200mV above RXD
–
, RXDO will be high; when this
pin is
≥
200mV below RXD
–
, RXDO will be low.
RXD
–
:
Differential Receiver Inverting Input.
RXI:
Noninverting Receiver Input. This input controls the
RXO output.
RXI:
Inverting Receiver Input. This input controls the RXO
output. In receiver keep-alive mode (CPEN high, SHDN
low), this receiver can be used to monitor a wake-up
control signal.
DX
CHARGE PUMP
DX
RX
RX
RX
C1
+
C1
–
CPEN
TXD
TXI
TXDEN
SHDN
RXEN
RXO
RX0
RXDO
GND
V
CC
C2
+
V
EE
TXD
–
C2
–
TXD
+
TXO
RXI
RXI
RXD
–
RXD
+
PGND
24
21
23
22
20
19
18
17
16
15
14
13
1
4
2
3
5
6
7
8
9
10
11
12
LTC1323CG
DX
CHARGE PUMP
DX
RX
RX
RX
C1
+
C1
–
CPEN
TXD
TXI
TXDEN
SHDN
RXEN
RXO
RX0
RXDO
NC
GND
NC
V
CC
C2
+
V
EE
TXD
–
C2
–
NC
NC
TXD
+
TXO
RXI
RXI
RXD
–
RXD
+
PGND
28
25
27
26
24
23
22
21
20
19
18
17
16
15
1
4
2
3
5
6
7
8
9
10
11
12
13
14
LTC1323CS
DX
CHARGE PUMP
RX
C1
+
C1
–
TXD
TXDEN
SHDN
RXEN
RXDO
GND
V
CC
C2
+
V
EE
TXD
–
C2
–
TXD
+
RXD
–
RXD
+
16
13
15
14
12
11
10
9
1
4
2
3
5
6
7
8
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