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參數(shù)資料
| 型號(hào)： | PI6C3991A-2 |
| 英文描述： | Clock IC | 250ps Accuracy. 3.3V. LVTTL. 3.75 to 80 MHz |
| 中文描述： | 時(shí)鐘IC |為250ps精度。 3.3。 LVTTL等級(jí)。 3.75至80 MHz |
| 文件頁(yè)數(shù)： | 1/10頁(yè) |
| 文件大?。?/td> | 544K |
| 代理商： | PI6C3991A-2 |
1
PS8449A 10/09/00
Features
PI6C3Q99X family provides following products:
PI6C3Q991: 32-pin PLCC version
PI6C3Q993: 28-pin QSOP version
Inputs are 5V I/O Tolerant
4 pairs of programmable skew outputs
Low skew: 200ps same pair; 250ps all outputs
Selectable positive or negative edge synchronization:
Excellent for DSP applications
Synchronous output enable
Output frequency: 3.75 MHz to 85 MHz
2x, 4x, 1/2, and 1/4 outputs
3 skew grades:
3-level inputs for skew and PLL range control
PLL bypass for DC testing
External feedback, internal loop filter
12mA balanced drive outputs
Low Jitter: < 200ps peak-to-peak
Industrial temperature range
Pin-to-pin compatible with IDT QS5V991 and QS5V993
Available in 32-pin PLCC and 28-pin QSOP
Description
The PI6C3Q99X family is a high fanout 3.3V PLL-based clock driver
intended for high performance computing and data-communica-
tions applications. A key feature of the programmable skew is the
ability of outputs to lead or lag the REF input signal. The PI6C3Q991
has 8 programmable skew outputs in 4 banks of 2, while the
PI6C3Q993 has 6 programmable skew outputs and 2 zero skew
outputs. Skew is controlled by 3-level input signals that may be hard-
wired to appropriate HIGH-MID-LOW levels.
When the GND/sOE pin is held low, all the outputs are synchro-
nously enabled. However, if GND/sOE is held high, all the outputs
except 3Q0 and 3Q1 are synchronously disabled. Furthermore, when
the V
CCQ
/PE is held high, all the outputs are synchronized with the
positive edge of the REF clock input. When V
CCQ
/PE is held low,
all the outputs are synchronized with the negative edge of REF. Both
devices have LVTTL outputs with 12mA balanced drive outputs.
Pin Configurations
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3.3V Programmable Skew PLL Clock Driver
PI6C3Q991, PI6C3Q993
SuperClock
REF
VCCQ
FS
3F0
3F1
VCCQ/PE
VCCN
4Q1
4Q0
GND
3Q1
3Q0
VCCN
FB
GND
TEST
2F1
2F0
GND/sOE
1F1
1F0
VCCN
1Q0
1Q1
GND
GND
2Q0
2Q1
28
27
26
25
24
23
22
21
20
19
18
17
16
15
1
2
3
4
5
6
7
8
9
10
11
12
13
14
2F0
GND/sOE
1F1
1F0
VCCN
1Q0
1Q1
GND
GND
3F1
4F0
4F1
VCCQ/PE
VCCN
4Q1
4Q0
GND
GND
5
6
7
8
9
10
11
12
13
14 15 16 17 18 19 20
29
28
27
26
25
24
23
22
21
3
3
V
F
V
2
2
3
F
V
R
G
T
2
4 3 2 1 32 31 30
PI6C3Q993
PI6C3Q991
28-Pin
Q
32-Pin
J
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| PI6C3991A-5 | High Efficiency, 2-Phase Synchronous Step-Down Switching Regulator |
| PI6C3991A-5I | Clock IC | 500ps Accuracy. 3.3V. LVTTL. 3.75 to 80 MHz. Industrial Temp. Operation |
| PI6C3991A-I | High Efficiency, 2-Phase Synchronous Step-Down Switching Regulator |
| PI6C3991I | Clock IC | 750ps Accuracy. 3.3V. LVTTL. 3.75 to 80 MHz. Industrial Temp. Operation |
| PI6C3991JI | Eight Distributed-Output Clock Driver |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| PI6C3991A-5 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Clock IC | 500ps Accuracy. 3.3V. LVTTL. 3.75 to 80 MHz |
| PI6C3991A-5I | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Clock IC | 500ps Accuracy. 3.3V. LVTTL. 3.75 to 80 MHz. Industrial Temp. Operation |
| PI6C3991A-I | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Clock IC | 750ps Accuracy. 3.3V. LVTTL. 3.75 to 80 MHz. Industrial Temp. Operation |
| PI6C3991I | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Clock IC | 750ps Accuracy. 3.3V. LVTTL. 3.75 to 80 MHz. Industrial Temp. Operation |
| PI6C3991-IJ | 制造商:PERICOM 制造商全稱:Pericom Semiconductor Corporation 功能描述:3.3V High-Speed, Low-Voltage Programmable Skew Clock Buffer SuperClock |
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