SSI34R3435 [TI]
SSI34R3435;
TEXAS INSTRUMENTS 
SSI 34R3435
5/12 V 1-Channel BiCMOS Thin Film
& MR Tape Drive R/W Device
May 1997
DESCRIPTION
FEATURES
The SSI 34R3435 is a BiCMOS monolithic integrated
circuit designed for use with one 2-terminal thin film
recording head and one MR sensing element. It
provides a low noise read amplifier and write driver for
the thin film head, a low noise read amplifier and bias
current for the MR element, and data protection
circuitry. Power supply fault protection is provided by
disabling the write current generator during power
sequencing. System write-to-read recovery time is
significantly improved by controlling the read channel
common mode output voltage shift in the write mode.
The SSI 34R3435 provides the user with a serial port
controllable write-current and MR bias adjustment
feature. Fault conditions are indicated through the serial
port and an external pin.
•
•
•
+5 V ±10% supply and +12 V ±10% supply
Low power 3 mA idle mode current
High performance:
-
-
-
-
-
MR read mode gain = 100 V/V
TFH read mode gain = 300 V/V
MR input current noise = 3.2 pA/√Hz max
MR input capacitance = 5 pF nom
Write current range = 5.4 - 55 mA
•
•
•
•
•
•
Write unsafe detection
Power supply fault protection
Head short to ground protection
Write-mode head swing 8 Vp-p diff (typical)
24-Lead VSOP package
The SSI 34R3435 requires both a +5 V and +12 V
power supply and is available in a 24-Lead VSOP
package.
Serial port controllable write current and read
bias
•
•
Serial port controllable flip-flop
Head open or shorted detection
BLOCK DIAGRAM
PIN DIAGRAM
1
24
23
22
21
20
19
18
17
16
15
14
13
WDI
VCC2
DGND
HWX
HWY
HRX
N/C
HWX
READ
PREAMP
HWY
2
SDEN
SCLK
SDATA
R/W
WRITE
3
WDI
FLIP-FLOP
DRIVER
4
5
CS
CTRL
R/W
SSI 34R3435
6
RHS
RHS
MRS
HRY
7
RDX
RDX
RDY
HRX
HRY
READ
PREAMP
READ
BUFFER
8
RDY
9
IMR
RBIAS
/VFAULT
/CS
10
11
12
AGND
VDD
MRS
IMR
WUS
VFAULT
VCC1
AGND
VDD
24-Lead VSOP
SCLK
DAC
DAC
SERIAL PORT
SDEN
SDATA
CAUTION: Use handling procedures necessary
for a static sensitive component.
05/16/97 - rev.
1
相关型号：
©2020 ICPDF网 联系我们和版权申明