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參數資料
| 型號： | TNETA1531 |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | 155.52-MHz Clock-Generation Device(155.52-MHz時鐘發生裝置) |
| 中文描述： | 155.52 MHz的時鐘生成裝置（155.52 MHz的時鐘發生裝置） |
| 文件頁數： | 1/3頁 |
| 文件大小： | 55K |
| 代理商： | TNETA1531 |
TNETA1531
155.52-MHz CLOCK-GENERATION DEVICE
SDNS022B – MARCH 1994 – REVISED JUNE 1995
Clock Frequency Is Selected Via Two Select
Inputs
Uses an Internal Third-Order Low-Pass
Filter
Copyright
1995, Texas Instruments Incorporated
1
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
Generates a 155.52-MHz Clock From a TTL
Clock of 19.44 MHz
Generates a 155.52-MHz Clock From ECL
Clock Signals at 38.88 MHz and 77.76 MHz
Provides Differential ECL Outputs
description
The TNETA1531 device is a 155.52-MHz clock-generation circuit with the capability of receiving a TTL clock
of 19.44 MHz and ECL clock signals at 38.88 MHz and 77.76 MHz. It has differential ECL outputs. The clock
frequency can be programmed by using the two select inputs. The TNETA1531 uses an internal third-order
low-pass filter to reduce jitter.
functional block diagram
Frequency-
and-Phase
Detector
Charge
Pump/Loop
Filter
Voltage-
Controlled
Oscillator
Divide by
2/4/8
TTLIN
ECLIN
SEL1
SEL2
ECLIN
CLKOUT
CLKOUT
TTLIN receives a 19.44-MHz signal. ECLIN and ECLIN receive 38.88-MHz and 77.76-MHz signals.
Terminal Functions
NAME
I/O
DESCRIPTION
TTLIN
I
19.44-MHz TTL input clock
ECLIN
I
38.88/77.76-MHz ECL input clock true
ECLIN
I
38.88/77.76-MHz ECL input clock complement
SEL1
I
Select input for clock frequency
SEL2
I
Select input for clock frequency
CLKOUT
O
155.52-MHz ECL output clock true
CLKOUT
O
155.52-MHz ECL output clock complement
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCT PREVIEW information concerns products in the formative or
design phase of development. Characteristic data and other
specifications are design goals. Texas Instruments reserves the right to
change or discontinue these products without notice.
P
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