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參數(shù)資料
型號: SY89540UMI TR
廠商: Micrel Inc
文件頁數(shù): 5/10頁
文件大小: 0K
描述: IC XPOINT SWITCH 3.2GBPS 44-MLF
標準包裝: 1,000
系列: Precision Edge®
功能: 交叉點開關(guān)
電路: 1 x 4:4
電壓電源: 單電源
電壓 - 電源,單路/雙路(±): 2.375 V ~ 2.625 V
電流 - 電源: 200mA
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 44-VFQFN 裸露焊盤,44-MLF?
供應(yīng)商設(shè)備封裝: 44-MLF?(7x7)
包裝: 帶卷 (TR)
其它名稱: SY89540UMITR
SY89540UMITR-ND
Micrel, Inc.
SY89540U
Oct., 1, 2013
M9999-120607-C
hbwhelp@micrel.com or (408) 955-1690
4
Pin Description
Pin Number
Pin Name
Pin Function
17, 15,
10, 8
4, 2
41, 39
IN0, /IN0,
IN1, /IN1,
IN2, /IN2,
IN3, /IN3
Differential Inputs: These input pairs are the differential signal inputs to the
device. Inputs accept AC- or DC-coupled signals as small as 100mV. Each pin
of a pair internally terminates to a VT pin through 50. Note that these inputs
will default to an indeterminate state if left open. Please refer to the "Input
Interface Applications" section for more details.
16, 9,
3, 40
VT0, VT1,
VT2, VT3
Input Termination Center-Tap: Each side of the differential input pair terminates
to a VT pin. The VT pins provide a center-tap to a termination network for
maximum interface flexibility. See "Input Interface Applications" section for more
details.
14,
11,
1,
42
VREF_AC0,
VREF_AC1,
VREF_AC2,
VREF_AC3
Reference Voltage: This output biases to VCC–1.2V. It is used when AC-
coupling the inputs (IN, /IN). Connect VREF_AC to the VT pin. Bypass each
VREF-AC pin with a 0.01
F low ESR capacitor. See "Input Interface
Applications" section for more details.
18, 19
SIN0,
SIN1
These single-ended TTL/CMOS-compatible inputs address the data inputs.
Note that these inputs are internally connected to a 25k pull-up resistor and
will default to a logic HIGH state if left open.
38, 37
SOUT0,
SOUT1
These single-ended TTL/CMOS-compatible inputs address the data outputs.
Note that these inputs are internally connected to a 25k pull-up resistor and
will default to logic HIGH state if left open.
5, 7
CONF,
LOAD
These single-ended TTL/CMOS-compatible inputs control the transfer of the
addresses to the internal multiplexers. See "Address Tables" and "Timing
Diagram" sections for more details. Note that these inputs are internally
conne
cted to a 25k pull-up resistor and will default to logic HIGH state if left
open.
Configuration Sequence
1. Load: Loads configuration into buffer, while Configuration Buffer holds
existing switch configuration.
2. Configuration: Loads new configuration into the Configuration Buffer and
updates switch configuration.
Buffer Mode
The SY89540U defaults to buffer mode (IN to Q) if the load and configuration
control signals are not exercised.
23, 24,
26, 27,
29, 30,
32, 33
Q0, /Q0,
Q1, /Q1,
Q2, /Q2,
Q3, /Q3,
Differential Outputs: These LVDS output pairs are the outputs of the device.
Please refer to the truth table below for details. Unused output pairs may be left
open. Each output is designed to drive 350mV into 100 across the pair.
6, 22, 25,
28, 31, 34
VCC
Positive power supply. Bypass with 0.1
F//0.01F low ESR capacitors and
place as close to each VCC pin.
12, 13, 20,
21,35, 36,
43, 44
GND,
Exposed pad
Ground. GND and EPad must both be connected to the same ground.
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