sza1000 NXP Semiconductors, sza1000 Datasheet - Page 2

• Manufacturer Part Number: sza1000
• Description: Qic Digital Equalizer
• Manufacturer: NXP Semiconductors

Philips Semiconductors
FEATURES
QUICK REFERENCE DATA
ORDERING INFORMATION
1998 Feb 16
V
V
I
I
f
f
T
DDD1
DDA1
clk(CLKIN)
clk(WEQCLK)
SZA1000H
3-wire serial interface for programming and status
reading
Suitable for MFM (Modified Frequency Modulation),
RLL 1,7 (Run Length Limited) and similar codes
Transfer rates with MFM code from
250 kbits/s to 4 Mbits/s
Transfer rates with RLL(1,7) code from
500 kbits/s to 12 Mbits/s
Programmable FIR (Finite Impulse-Response) filter
makes it possible to equalize complex and asymmetric
channel impulse responses
Programmable fixed and tracking qualification
thresholds provide reliable data recovery in read mode,
and reliable bad sector detection in verify mode
Read pulse output for floppy tape drives
Digital data synchronizer based on digital PLL with
maximum likelihood detector for a better error rate than
can be achieved with conventional analog circuits
Data verification can be used (with the maximum
likelihood detector switched off) to find bad sectors on
drives with conventional read electronics
Servo stripe detection for TR4, QIC3080 and similar
formats
Gap detector
2 programmable current sources
amb
DDD1
DDA1
QIC digital equalizer
NUMBER
SYMBOL
TYPE
; I
; I
; V
; V
DDD2
DDA2
DDA2
DDD2
digital supply voltage
analog supply voltage
digital supply current
analog supply current
read circuit clock frequency
WEQ circuit clock frequency
ambient operating temperature
QFP44
NAME
PARAMETER
plastic quad flat package; 44 leads (lead length 1.3 mm)
body 10
10
1.75 mm
f
s
DESCRIPTION
= 24 MHz
2
CONDITIONS
GENERAL DESCRIPTION
The SZA1000 is a single chip digital equalizer for single
channel QIC (Quarter Inch Cartridge) systems with
MR (Magneto Resistive) heads. It can be used with
QIC 3010, QIC 3020, QIC 3080, QIC 3095, Travan 2, 3, 4
and 5, and similar formats.
It replaces a pulse detector, programmable filter and data
synchronizer, and adds a FIR filter to the conventional
analog solution. This makes it possible to equalize
yoke-type MR heads as well as SIG (Sensor In Gap)
MR heads.
PACKAGE
Peak-to-peak amplitude detector with lowpass filter for
servo burst reading
Fully digital PLL for clock and data recovery:
– Fully programmable behaviour
– No external components, no tolerance problems
– Programmable window shift
– Fast run-in capability
– Ideal zero phase restart.
Parallel 8-bit input and output for product development
and production testing
Programmable WEQ (write equalization) circuit with
transfer rates of up to 2 Mbits/s for floppy tape drives
and up to 8 Mbits/s for drives with internal controllers.
4.5
4.5
0
MIN.
5.0
5.0
32
50
24
24
TYP.
Product specification
5.5
5.5
24
36
70
MAX.
SZA1000
SOT307-2
VERSION
V
V
mA
mA
MHz
MHz
C
UNIT