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| 型号： | MAX4999ETJ+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 9/11页 |
| 文件大小： | 0K |
| 描述： | IC MULTIPLEXER 8X1 32TQFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 功能： | 多路复用器 |
| 电路： | 1 x 8:1 |
| 导通状态电阻： | 12 欧姆 |
| 电压电源： | 单电源 |
| 电压 - 电源，单路/双路(±)： | 3 V ~ 3.6 V |
| 电流 - 电源： | 5µA |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 32-WFQFN 裸露焊盘 |
| 供应商设备封装： | 32-TQFN-EP（5x5） |
| 包装： | 带卷 (TR) |
MAX4999
USB 2.0 Hi-Speed Differential
8:1 Multiplexer
_______________________________________________________________________________________
7
Detailed Description
The MAX4999 differential Hi-Speed USB analog multi-
plexer features low on-capacitance (CON) and low on-
resistance (RON) necessary for high-performance
switching applications. The low CON is designed for
USB server/mass storage devices. This device is ideal
for USB 2.0 Hi-Speed applications at 480Mbps, while
also meeting the requirements for USB low-/full-speed
applications.
Digital Control Inputs (C0, C1, C2)
The MAX4999 provides three digital control inputs (C0,
C1, C2) to select the analog signal path between the
COM_ and D-/D+ channels. The truth table for the
MAX4999 is shown in the
Functional Diagram/Truth
Table. Driving the control inputs rail-to-rail minimizes
power consumption.
Enable Input (EN)
The MAX4999 features an enable input that when driven
low, places the device in standby mode. In standby
mode, all channels are high impedance and the internal
charge pump is disabled, thus minimizing the quiescent
supply current. For normal operation, drive EN high.
Analog Signal Levels
Signals applied to COM1 are routed to D_ _1 terminals.
Signals applied to COM0 are routed to D_ _0 terminals.
This multiplexer is bidirectional, allowing COM_ and
D-/D+ terminals to be configured as either inputs or
outputs. Additionally, the MAX4999 can be used for
non-USB signals if the signals fall within the normal
operating range.
The MAX4999 features an internal charge pump that
allows signal levels greater than the supply voltage.
Limit the analog input/output signal level to no more
than the
Absolute Maximum Ratings.
Pin Description
PIN
NAME
FUNCTION
1, 11, 14, 17,
21, 24, 27, 30
GND
Ground
2, 20
VCC
Power-Supply Input. Bypass VCC to GND with a 0.1F capacitor placed as close to VCC as possible.
3
EN
Enable Input
4
COM0
Analog Switch Common D- Terminal
5
COM1
Analog Switch Common D+ Terminal
6
C0
Control Input 0
7
C1
Control Input 1
8
C2
Control Input 2
9
D0_0
Analog Switch 0 D- Terminal
10
D0_1
Analog Switch 0 D+ Terminal
12
D1_0
Analog Switch 1 D- Terminal
13
D1_1
Analog Switch 1 D+ Terminal
15
D2_0
Analog Switch 2 D- Terminal
16
D2_1
Analog Switch 2 D+ Terminal
18
D3_0
Analog Switch 3 D- Terminal
19
D3_1
Analog Switch 3 D+ Terminal
22
D4_1
Analog Switch 4 D+ Terminal
23
D4_0
Analog Switch 4 D- Terminal
25
D5_1
Analog Switch 5 D+ Terminal
26
D5_0
Analog Switch 5 D- Terminal
28
D6_1
Analog Switch 6 D+ Terminal
29
D6_0
Analog Switch 6 D- Terminal
31
D7_1
Analog Switch 7 D+ Terminal
32
D7_0
Analog Switch 7 D- Terminal
—
EP
Exposed Pad. Connect EP to GND or leave unconnected.
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