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參數(shù)資料
| 型號(hào)： | SY88808LMH TR |
| 廠商： | Micrel Inc |
| 文件頁(yè)數(shù)： | 5/10頁(yè) |
| 文件大?。?/td> | 0K |
| 描述： | IC TXRX W/EQ 3.3V 10.3GBPS 28MLF |
| 標(biāo)準(zhǔn)包裝： | 1,000 |
| 類(lèi)型： | 收發(fā)器 |
| 驅(qū)動(dòng)器/接收器數(shù)： | 1/1 |
| 電源電壓： | 3.135 V ~ 3.465 V |
| 安裝類(lèi)型： | 表面貼裝 |
| 封裝/外殼： | 28-VFQFN 裸露焊盤(pán) |
| 供應(yīng)商設(shè)備封裝： | 28-QFN（4x4） |
| 包裝： | 帶卷 (TR) |
Micrel, Inc.
SY88808L
June 2010
4
M9999-063010-A
hbwhelp@micrel.com or (408) 955-1690
Pin Description
Pin Number
Pin Name
Pin Function
1, 28
TXQ, /TXQ
Differential Transmitter Output: This CML output pair is designed to drive 50
signals with
variable output swing.
2, 13, 16, 27
VCC
Positive power supply: Connect to 3.3V power supply. Bypass with 0.1
μF||0.01μF low-ESR
capacitors as close to VCC pins as possible.
3, 19
NC
No connect.
4
TXSW
Programmable Swing Input pin: This input pin allows the user to set variable output swing.
This pin can be programmed via external potentiometer (or a resistor) to output a swing from
100mVPK to 350mVPK. See “Programmable TX Output Swing” table for details.
5, 10, 11, 12
24, 25
RXEQDC,
RXEQMF,
RXEQHF,
RXEQUHF,
TXEQHF,
TXEQUHF
Programmable EQ: Equalization circuit can recover degraded signals after long traces of FR4
board. Equalization can be programmed via an external potentiometer (or resistor). This
equalization scheme is optimized to recover degraded signal from any length of transmission
line. The receiver of the RX channel can equalize up to 36” FR4 or 10m 26AWG cable. The
receiver of the TX channel can equalize up to 9” FR4 or 3m 26AWG cable. RXEQDC,
RXEQMF, RXEQHF, and RXEQUHF control DC, medium, high, and ultra high components of
input data signals of RX channel respectively. TXEQHF and TXEQUHF control high and ultra
high components of input data signals of TX channel respectively. See “Programmable
Equalization” table for details.
6, 9, 20, 23
GND, Exposed Pad
Ground: Ground pins and exposed pad must be connected to the same ground plane.
7, 8
RXIN, /RXIN
Differential Receiver Input: This input pair is the differential input to the receive channel. It
accepts differential AC-coupled signals as small as 150mVPK at the input of the transmission
line. The input signal is fed in to an equalization circuit. The loss-of-signal (LOS) level includes
a small amount of hysteresis to prevent the LOS output from oscillating when no signal is
present.
14, 15
/RXQ, RXQ
Differential Receiver Output: This CML output pair is designed to drive 250mVPK swing in to
50
.
17, 26
/RXEN, /TXEN
Single-Ended Input: TTL/CMOS compatible control input for the output pairs. The disable pins
are internally connected to a 25k
pull-up resistor and will default to a logic HIGH state
(Disable) if left open. When disabled, the Q goes LOW, and /Q goes HIGH. Default threshold
is VCC/2.
18
LOS
Single-Ended Output: This TTL/CMOS output signal switches LOW when the input signal of
the receiver channel is valid and switches HIGH when the input signal is not valid. LOS is an
open-collector output.
21, 22
TXIN, /TXIN
Differential Transmitter Input: This input pair is the differential input to the transmit channel
and accepts differential AC-coupled signals which are fed in to equalization circuit. Input
swing is recommended to be
≥150mV
PK at the input of the transmission line to ensure valid
outputs.
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