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TDA5155X

Pre-amplifier for Hard Disk Drive (HDD) with MR-read/inductive write heads

Philips Electronics 

Philips Semiconductors

Pre-amplifier for Hard Disk Drive (HDD)

with MR-read/inductive write heads

Preliminary specification

TDA5155

7 PINNING

SYMBOL PAD

DESCRIPTION

VCC(WD)

GND1

1 supply voltage for the write drivers

2 ground connection 1

HUS

3 head unsafe output

WDIx(v)

4 write data input (differential, voltage

input)

WDIy(v)

5 write data input (differential, voltage

input)

WDIx(i)

6 write data input (differential, current

input)

WDIy(i)

7 write data input (differential, current

input)

R/W

8 read/write (read = active HIGH,

write = active LOW)

SEN

9 serial bus enable

SDATA 10 serial bus data

SCLK

11 serial bus clock

GND2

12 ground connection 2

RDx

13 read data output (differential x − y)

RDy

14 read data output (differential x − y)

GND3

15 ground connection 3

VCC

Rext

GND4

16 supply voltage

17 10 kΩ external resistor

18 ground connection 4

0Wx

19 inductive write head connection for

head H0 (differential x − y)

0Wy

20 inductive write head connection for

head H0 (differential x − y)

0Rx

21 MR-read head connection for head

H0 (differential x − y)

0GND

22 ground connection for head H0

0Ry

23 MR-read head connection for head

H0 (differential x − y)

1Wx

24 inductive write head connection for

head H1 (differential x − y)

1Wy

25 inductive write head connection for

head H1 (differential x − y)

1Rx

26 MR-read head connection for head

H1 (differential x − y)

1GND

27 ground connection for head H1

1Ry

28 MR-read head connection for head

H1 (differential x − y)

2Wx

29 inductive write head connection for

head H2 (differential x − y)

SYMBOL PAD

DESCRIPTION

2Wy

30 inductive write head connection for

head H2 (differential x − y)

2Rx

31 MR-read head connection for head

H2 (differential x − y)

2GND

32 ground connection for head H2

2Ry

33 MR-read head connection for head

H2 (differential x − y)

3Wx

34 inductive write head connection for

head H3 (differential x − y)

3Wy

35 inductive write head connection for

head H3 (differential x − y)

3Rx

36 MR-read head connection for head

H3 (differential x − y)

3GND

37 ground connection for head H3

3Ry

4Wx

38 MR-read head connection for head

H3 (differential x − y)

39 inductive write head connection for

head H4 (differential x − y)

4Wy

40 inductive write head connection for

head H4 (differential x − y)

4Rx

41 MR-read head connection for head

H4 (differential x − y)

4GND

42 ground connection for head H4

4Ry

43 MR-read head connection for head

H4 (differential x − y)

5Wx

44 inductive write head connection for

head H5 (differential x − y)

5Wy

45 inductive write head connection for

head H5 (differential x − y)

5Rx

5GND

46 MR-read head connection for head

H5 (differential x − y)

47 ground connection for head H5

5Ry

48 MR-read head connection for head

H5 (differential x − y)

6Wx

49 inductive write head connection for

head H6 (differential x − y)

6Wy

50 inductive write head connection for

head H6 (differential x − y)

6Rx

51 MR-read head connection for head

H6 (differential x − y)

6GND

52 ground connection for head H6

6Ry

53 MR-read head connection for head

H6 (differential x − y)

7Wx

54 inductive write head connection for

head H7 (differential x − y)

1997 Apr 08

6

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