- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄383940 > TDA5155X (NXP SEMICONDUCTORS) Pre-amplifier for Hard Disk Drive HDD with MR-read/inductive write heads PDF資料下載
參數(shù)資料
| 型號： | TDA5155X |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 光電元器件 |
| 英文描述： | Pre-amplifier for Hard Disk Drive HDD with MR-read/inductive write heads |
| 中文描述： | 10 CHANNEL READ WRITE AMPLIFIER CIRCUIT, UUC68 |
| 文件頁數(shù)： | 14/24頁 |
| 文件大?。?/td> | 112K |
| 代理商： | TDA5155X |
1997 Apr 08
14
Philips Semiconductors
Preliminary specification
Pre-amplifier for Hard Disk Drive (HDD)
with MR-read/inductive write heads
TDA5155
8.8
Head unsafe
The HUS pin is an open collector output. Therefore when
the pin is not connected to an external pull-up resistor,
HUS is LOW. HUS pins can be connected together in case
of operation with more than one amplifier. It is used to
detect abnormal or unexpected operation.
Sleep mode:
HUS is HIGH, to permit working with more
than one amplifier.
Standby mode:
HUS is HIGH, to permit working with
more than one amplifier.
Read mode:
If in the configuration register d3 = 1, HUS is HIGH
If in the configuration register d3 = 0, HUS goes LOW
for:
– Selection of a wrong head (H10 to H15)
(1)
– R
ext
pin open, short-circuited to ground or to V
CC
(read current too low or too high)
– Low V
CC
and V
CC(WD)
conditions. A low supply
voltage detector is placed close to the V
CC
and
V
CC(WD)
pins.
Detection of low V
CC
(main supply): a V
CC
supply voltage
below 4.0 V
±
5% is flagged at the HUS pin. The voltage
detection range is then 4.2 to 3.8 V with an hysteresis of
110 mV
±
10%. Detection of low V
CC(WD)
(write drivers
supply): a fault will be flagged at the HUS pin if V
CC(WD)
drops 0.8 V
±
10% below V
CC
. One must be aware that
such a detection is only aimed to warn for a catastrophic
situation. Indeed, V
CC(WD)
should never be below V
CC
.
Test mode:
HUS is HIGH except when the TAS detector
is ON. If a thermal asperity is detected, HUS goes LOW.
Servo write mode:
HUS is LOW.
Write mode:
If in the configuration register d3 = 1, HUS is LOW
If in the configuration register d3 = 0, HUS goes HIGH
for:
– Selection of a wrong head (H10 to H15)
(1)
– R
ext
pin open, short-circuited to ground or to V
CC
(write current too low or too high)
– Write Data Input frequency too low (WDIx-WDIy)
– Write head Wx, Wy open, Wx or Wy short-circuited to
ground
(2)
– Write driver still left biased while not selected
– Low V
CC
and V
CC(WD)
conditions (write current inhibit
can be active or inactive).
The same detector is used for read and write mode.
The write current may be inhibited if d2 = 0 in the
configuration register.
The HUS line indicates an unsafe condition as long as the
fault is present, in read mode as well as in write mode.
It indicates again a safe condition only 0.5
μ
s to 1
μ
s after
the last fault has disappeared.
(1) Head numbers 0 to 9 are correct, 10 to 15 are signalled as
unsafe.
(2) Switching to write mode makes HUS LOW. After the transient
the HUS detection circuitry is activated. The target for the
head open detection time is 15 ns.
8.9
HUS survey
Notes
1.
2.
A-test mode = analog test mode.
In servo mode, the performance of the IC is not guaranteed.
HUS
DATA BIT D3
MODE
STATE
0
1
Sleep mode
Standby mode
Active mode
HIGH
HIGH
ACTIVE
HIGH
ACTIVE
ACTIVE
HIGH
LOW
HIGH
HIGH
HIGH
HIGH
ACTIVE
LOW
HIGH
LOW
Read
Read mode
A-test mode
(1)
TAS mode
Write mode
A-test mode
(1)
Servo mode
(2)
Write
相關PDF資料 |
PDF描述 |
|---|---|
| TDA5240 | Brushless DC motor drive circuit |
| TDA5240T | Brushless DC motor drive circuit |
| TDA5241 | Brushless DC motor drive circuit |
| TDA5330T | VHF, UHF and Hyperband mixer/oscillator for TV and VCR 3-band tuners |
| TDA5332T | Double mixer/oscillator for TV and VCR tuners |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| TDA5200 | 功能描述:射頻接收器 CNTRL RF RECEIVER 870MHZ 5V RoHS:否 制造商:Skyworks Solutions, Inc. 類型:GPS Receiver 封裝 / 箱體:QFN-24 工作頻率:4.092 MHz 工作電源電壓:3.3 V 封裝:Reel |
| TDA5200_10 | 制造商:INFINEON 制造商全稱:Infineon Technologies AG 功能描述:ASK Single Conversion Receiver |
| TDA5200T | 制造商:Infineon Technologies AG 功能描述:RF Receiver ASK 5V 28-Pin TSSOP T/R |
| TDA5200XUMA1 | 制造商:Infineon Technologies AG 功能描述:RF Receiver ASK 5V T/R 制造商:Infineon Technologies AG 功能描述:CONTROL - Tape and Reel 制造商:Infineon Technologies AG 功能描述:CONTROL - Cut TR (SOS) 制造商:Infineon Technologies 功能描述:Infineon Technologies TDA5200XUMA1 RF Transceivers 制造商:Infineon Technologies AG 功能描述:IC LP SGL CONV ASK P-TSSOP-28 |
| TDA5201 | 功能描述:射頻接收器 5V 4.6mA ASK Receiver RoHS:否 制造商:Skyworks Solutions, Inc. 類型:GPS Receiver 封裝 / 箱體:QFN-24 工作頻率:4.092 MHz 工作電源電壓:3.3 V 封裝:Reel |
發(fā)布緊急采購，3分鐘左右您將得到回復。