Pericom Semiconductor Symbol Description Min Typical Max. Unit" />
參數(shù)資料
型號： PI7C9X7954AFDE
廠商： Pericom
文件頁數(shù)： 63/70頁
文件大?。?/td> 0K
描述： IC PCIE-TO-UART BRIDGE 128LQFP
標(biāo)準(zhǔn)包裝： 90
應(yīng)用： PCIe至UART橋接
接口： 高級配置電源接口（ACPI）
電源電壓： 1.8V, 3.3V
封裝/外殼： 128-LQFP 裸露焊盤
供應(yīng)商設(shè)備封裝： 128-LQFP（14x14）
包裝： 托盤
安裝類型： 表面貼裝
PI7C9X7954
PCI Express Quad UART
Datasheet
Page 66 of 70
May 2013 – Revision 1.4
Pericom Semiconductor
Symbol
Description
Min
Typical
Max.
Unit
VTX-RCV-DETECT
Voltage change during Receive
Detection
VTX-DIFFp
mV
RLTX-DIFF
Transmitter Differential Return loss
10
dB
RLTX-CM
Transmitter Common Mode Return loss
6
dB
ZOSE
Single-ended output impedance
40
50
60
ZTX-DIFF-DC
DC Differential TX Impedance
80
100
120
TTX-RISE, TTX-FALL
Rise / Fall time of TxP, TxN outputs
80
110d
ps
Jitter Parameters
UI
Unit Interval
399.88
400
400.12
ps
TTX-MAX-JITTER
Transmitter total jitter (peak-to-peak)
0.30e
UI
TTX-EYE
Minimum TX Eye Width (1 -
TTX-MAX-JITTER)
0.70
UI
TTX-EYE-MEDIAN-to-
MAX-JITTER
Maximum time between the jitter
median and
maximum deviation from the median
0.15
UI
Timing Parameters
LTLAT-10
Transmitter data latency (for n=10)
9
11
UI
LTLAT-20
Transmitter data latency (for n=20)
9
11
UI
LTX-SKEW
Transmitter data skew between any 2
lanes
0
2 +
200ps
UI
TTX-IDLE-SET-TO-IDLE
Maximum time to transition to a valid
electrical idle after sending an Electrical
Idle ordered set
8
ns
TEIExit
Time to exit Electrical Idle (L0s) state
into L0
12
16
ns
TBTEn
Time from asserting BeaconTxEn to
beacon being transmitted on the lane
30
80
ns
a. Measured with Vtt = 1.2V, HiDrv=’0’,LowDrv=’0’ and Dtx=’0000’.
b. Minimum swing assumes LoDrv = 1, HiDrv = 0 and Dtx =1100
c. Max swing assumes LoDrv = 0, HiDrv = 1, Dtx = 0010, VTT = 1.8V
d. As measured between 20% and 80% points. Will depend on package characteristics.
e. Measured using PCI Express Compliance Pattern
Table 9-4 Receiver Characteristics
Symbol
Description
Min
Typical
Max.
Unit
Voltage Parameters
VRX-DIFFp-p
Differential input voltage
(peak-to-peak)
170
1200
mV
VRX-IDLE-DET-DIFFp-p
Differential input threshold voltage
(peak-to-peak) to assert
TxIdleDetect output
65
175
mV
VRX-CM-AC
Receiver common-mode voltage for
AC-coupling
0
150
mV
TRX-RISE, TRX-FALL
Rise time / Fall time of RxP, RxN
inputs
160
Ps
ZRX-DIFF-DC
Differential input impedance (DC)
80
100
120
ZRX-COM-DC
Single-ended input impedance
40
50
60
ZRX-COM-INITIAL-DC
Initial input common mode
impedance (DC)
5
50
60
ZRX-COM-HIGH-IMP-DC
Powered down input common mode
impedance (DC)
200k
RLRX-DIFF
Receiver Differential Return Lossa
10
dB
RLRX-CM
Receiver Common Mode Return
Lossb
6
dB
Jitter Parameters
TRX-MAX-JITTER
Receiver total jitter tolerance
0.65
UI
TRX-EYE
Minimum Receiver Eye Width
0.35
UI
TRX-EYE-MEDIAN-to-MAX-JITTER
Maximum time between jitter
median and max deviation from
median
0.325
UI
Timing Parameters
LRLAT-10
Receiver data latency for n=10
28
29
bits
LRLAT-20
Receiver data latency for n=20
49
60
bits
13-0093
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