JAJSQ97 データシート

JAJSQ97J may 2009 – january 2021 XIO2001

PRODUCTION DATA

パッケージ・オプション

メカニカル・データ（パッケージ｜ピン）

PNP|128
- MPQF060E
ZWS|169
- MPBGAK4B
ZAJ|144
- MPBG878A

サーマルパッド・メカニカル・データ

PNP|128
- PPTD154D

発注情報

6.6 PCI Express Differential Transmitter Output Ranges

PARAMETER	TERMINALS	MIN	NOM	MAX	UNIT	COMMENTS
UI⁽¹⁾ Unit interval	TXP, TXN	399.88	400	400.12	ps	Each UI is 400 ps ±300 ppm. UI does not account for SSC dictated variations.
V_TX-DIFF-PP Differential peak-to-peak output voltage	TXP, TXN	0.8		1.2	V	V_TX-DIFF-PP = 2*\|V_TXP – V_TXN\|
V_{TX-DIFF-PP-LOW} Low-power differential peak-to-peak TX voltage swing	TXP, TXN	0.4		1.2	V	V_TX-DIFF-PP = 2*\|V_TXP – V_TXN\|
V_{TX-DE-RATIO-3.5dB} TX de-emphasis level ratio	TXP, TXN	3		4	dB	This is the ratio of the V_TX-DIFF-PP of the second and following bits after a transition divided by the V_TX-DIFF-PP of the first bit after a transition.
T_TX-EYE⁽²⁾ ⁽³⁾ ⁽⁴⁾ Minimum TX eye width	TXP, TXN	0.75			UI	Does not include SSC or Ref_CLK jitter. Includes R_j at 10^–12.
T_{TX-EYE-MEDIAN-to-MAX-JITTER}⁽²⁾ Maximum time between the jitter median and maximum deviation from the median	TXP, TXN			0.125	UI	Measured differentially at zero crossing points after applying the 2.5 GT/s clock recovery function.
T_TX-RISE-FALL⁽²⁾ TX output rise/fall time	TXP, TXN	0.125			UI	Measured differentially from 20% to 80% of swing.
BW_TX-PLL⁽⁶⁾ Maximum TX PLL bandwidth	TXP, TXN			22	MHz	Second order PLL jitter transfer bounding function.
BW_{TX-PLL-LO-3DB}⁽⁶⁾⁽⁷⁾ Minimum TX PLL bandwidth	TXP, TXN	1.5			MHz	Second order PLL jitter transfer bounding function.
RL_TX-DIFF Tx package plus Si differential return loss	TXP, TXN	10			dB
RL_TX-CM Tx package plus Si common mode return loss	TXP, TXN	6			dB	Measured over 0.05–1.25 GHz range
Z_{TX-DIFF_DC} DC differential TX impedance	TXP, TXN	80		120	Ω	Low impedance defined during signaling.
V_TX-CM-AC-P⁽⁵⁾ T_X AC common mode voltage	TXP, TXN			20	mV
I_TX-SHORT Transmitter short-circuit current limit	TXP, TXN			90	mA	The total current transmitter can supply when shorted to ground.
V_TX-DC-CM Transmitter DC common-mode voltage	TXP, TXN	0		3.6	V	The allowed DC common-mode voltage at the transmitter pins under any conditions.
V_{TX-CM-DC-ACTIVE-IDLE-DELTA} Absolute delta of DC common mode voltage during L0 and electrical idle	TXP, TXN	0		100	mV	\|VTX-CM-DC – VTX-CM-Idle-DC\| ≤ 100 mV V_TX-CM-DC = DC_(avg) of \|V_TXP + V_TXN\|/2 [during L0] V_{TX-CM-Idle-DC} = DC_(avg) of \|V_TXP + V_TXN\|/2 [during electrical idle]
V_{TX-CM-DC-LINE-DELTA} Absolute delta of DC common mode voltage between P and N	TXP, TXN	0		25	mV	\|V_TXP-CM-DC – V_TXN-CM-DC\| ≤25 mV when V_TXP-CM-DC = DC_(avg) of \|V_TXP\| [during L0] V_TXN-CM-DC = DC_(avg) of \|V_TXN\| [during L0]
V_{TX-IDLE-DIFF-AC-p} Electrical idle differential peak output voltage	TXP, TXN	0		20	mV	V_{TX-IDLE-DIFFp} = \|V_TXP-Idle – V_TXN-Idle\| ≤ 20 mV
V_{TX-RCV-DETECT} The amount of voltage change allowed during receiver detection	TXP, TXN			600	mV	The total amount of voltage change that a transmitter can apply to sense whether a low impedance receiver is present.
T_TX-IDLE-MIN Minimum time spent in electrical idle	TXP, TXN	20			ns	Minimum time a transmitter must be in electrical idle.
T_{TX-IDLE-SET-TO-IDLE} Maximum time to transition to a valid electrical idle after sending an EIOS	TXP, TXN			8	ns	After sending the required number of EIOSs, the transmitter must meet all electrical idle specifications within this time. This is measured from the end of the last EIOS to the transmitter in electrical idle.
T_{TX-IDLE-TO-DIFF-DATA} Maximum time to transition to a valid diff signaling after leaving electrical idle	TXP, TXN			8	ns	Maximum time to transistion to valid diff signaling after leaving electrical idle. This is considered a debounce time to the Tx.
C_TX AC coupling capacitor	TXP, TXN	75		200	nF	All transmitters shall be AC coupled. The AC coupling is required either within the media or within the transmitting component itself.

(1) SCC permits a 0, –5000 ppm modulation of the clock frequency at a modulation rate not to exceed 33 kHz.

(2) Measurements at 2.5 GT/s require a scope with at least 6.2 GHz bandwidth. 2.5 GT/s may be measured within 200 mils of Tx device's pins, although deconvolution is recommended.

(3) Transmitter jitter is measured by driving the transmitter under test with a low jitter "ideal" clock and connecting the DUT to a reference board.

(4) Transmitter raw jitter data must be convolved with a filtering function that represents the worst case CDR tracking BW. After the convolution process has been applied, the center of the resulting eye must be determined and used as a reference point for obtaining eye voltage and margins.

(5) Measurement is made over at least 10 UI.

(6) The Tx PLL Bandwidth must lie between the min and max ranges given in the above table. PLL peaking must lie below the value listed above. Note: the PLL B/W extends from zero up to the value(s) specified in the above table.

(7) A single combination of PLL BW and peaking is specified for 2.5 GT/s implemenations.