- 您現(xiàn)在的位置：買(mǎi)賣(mài)IC網(wǎng) > PDF目錄382702 > U2781B Frequency Synthesizer PDF資料下載
參數(shù)資料
| 型號(hào)： | U2781B |
| 英文描述： | Frequency Synthesizer |
| 中文描述： | 頻率合成器 |
| 文件頁(yè)數(shù)： | 1/10頁(yè) |
| 文件大小： | 204K |
| 代理商： | U2781B |
U2781B
TELEFUNKEN Semiconductors
Rev. A3, 26-Nov-97
1 (10)
Frequency Synthesizer
Description
The programmable frequency synthesizer IC U2781B for
μ
P-controlled application is realized with TEMIC’s
advanced UHF process which is very suitable for
combinations of fast ECL logic and low-current I
2
L logic.
The benefits are high input sensitivity in connection with
low
power
consumption
packages (SSO20). This makes the device a perfect
Features
Very low current consumption (typ. 3 V/ 5 mA)
Supply voltage range: 2.7 to 5.5 V
Max. input frequency: 1.1 GHz
Programmable prescaler 64/ 65 or 128/ 129
Controlled by 3-wire bus with f
clock
up to 500 kHz
Status output for PLL lock/ unlock condition
Very fast phase detector
SSO20 package
ESD protection in accordance with MIL-STD. 883
method 3015 class 2
Block Diagram
and
therefore
small
choice for cordless phones and handheld cellular radio
sets up to 1.1 GHz.
Electrostatic sensitive device.
Observe precautions for handling.
Benefits
Very low current consumption extends talk time
Few external components and SSO package save costs
and space
Charge
pump
Prescaler
64/65
128/129
V
VS
18-bit
shift register
Phase
detector
Oscillator
14-bit
reference counter
Data
Enable
Clock
Osci
Osco
GND
1-bit latch
load control
PS
CP
LDo
Mo
RFi
7-bit
swallow
counter
15-bit latch
11-bit
main
counter
18-bit latch
SCP
17
3
15
1
8
11
13
7
4
10
6
14
5
93 7785 e
Figure 1. Block diagram
Ordering Information
Extended Type Number
U2781B-AFS
U2781B-AFSG3
Package
SS020
SS020
Remarks
Rail, MOQ 830 pcs
Tape and reel, MOQ 4000 pcs
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| U2782B | Ring Tongue Solderless Terminal; RoHS Compliant: Yes |
| U2782B-AFS | Ring Tongue Solderless Terminal; Wire Size (AWG):6; Stud Size:#10 RoHS Compliant: Yes |
| U2782B-AFSG3 | 1100 MHz Twin PLL |
| U2794 | 1000 MHz Quadrature Demodulator |
| U2794B | 1000 MHz Quadrature Demodulator |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| U2781B-AFS | 制造商:TEMIC 制造商全稱:TEMIC Semiconductors 功能描述:Frequency Synthesizer |
| U2781B-AFSG3 | 制造商:TEMIC 制造商全稱:TEMIC Semiconductors 功能描述:Frequency Synthesizer |
| U2782B | 制造商:TEMIC 制造商全稱:TEMIC Semiconductors 功能描述:1100 MHz Twin PLL |
| U2782B-AFS | 制造商:TEMIC 制造商全稱:TEMIC Semiconductors 功能描述:1100 MHz Twin PLL |
| U2782B-AFSG3 | 制造商:TEMIC 制造商全稱:TEMIC Semiconductors 功能描述:1100 MHz Twin PLL |
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。