QS29FCT520T, 521T, 2520T, 2521T
Q
•
•
•
•
High Speed CMOS
High Speed CMOS
Multilevel Pipeline
Bus Exchange
Registers
Switches
QS29FCT520T
QS3383
QS29FCT521T
QS32383
QS29FCT2520T
QS29FCT2521T
FEATURES/BENEFITS
Pin and function compatible to the Am29520
Ground bounce controlled outputs
Reduced output swing of 0-3.5V
Available in DIP, ZIP, SOIC, QSOP, HQSOP
•
•
•
•
TTL-compatible input and output levels
CMOS power levels: <7.5 mW static
Undershoot clamp diodes on all inputs
Military product compliant to MIL-STD-883
FCT-T520T/1T
•
•
•
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JEDEC-FCT spec compatible
Fastest CMOS logic family available
A, B, and C speed grades with 6 ns t
PD
for C
I
OL
= 48 mA Com., 32 mA Mil.
FCT-T 2520T/1T
• Built-in 25Ω series resistor outputs reduce
reflection and other system noise
• A, B, and C speed grades with 6 ns t
PD
for C
• I
OL
= 12 mA Com.
3
DESCRIPTION
The QS29FCT520AT/BT and QS29FCT521AT/BT provide four 8-bit registers useful for temporary storage
and for stage delays in pipelined systems. The four registers may be configured as a dual 2-level or single
4-level shift register pipeline. A single 8-bit input is provided, and any of the four registers may be selected
for gating to the single 8-bit output. The 520 and 521 differ only in how the registers are loaded in the dual 2-
rank mode, as shown in the function tables. The QS29FCT520/1 are pin and function compatible with the
Am29520/1 bipolar parts, except for higher speed and significantly lower power.
FUNCTIONAL BLOCK DIAGRAM
D7-D0
MULTIPLEXER
I
0,
I
1
REGISTER CONTROL
REGISTER B1
REGISTER A1
REGISTER B2
REGISTER A2
CLOCK
S0, S1
OE
MULTIPLEXER
AND OUTPUT DRIVERS
25Ω
(FCT2xxx Only)
Y7-Y0
MDSL-00002-02
QUALITY SEMICONDUCTOR, INC.
1
QS29FCT520T, 521T, 2520T, 2521T
PIN CONFIGURATIONS (All Pins Top View)
PDIP, SOIC, QSOP, HQSOP
ZIP
I
0
I
1
D0
D1
D2
D3
D4
D5
D6
D7
CLK
GND
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13
VCC
S0
S1
Y0
Y1
Y2
Y3
Y4
Y5
Y6
Y7
I
0
D0
D2
D4
D6
CLK
OE
Y6
Y4
Y2
Y0
S0
OE
1
3
5
7
9
11
13
15
17
19
21
23
2
4
6
8
10
12
14
16
18
20
22
24
I
1
D1
D3
D5
D7
GND
Y7
Y5
Y3
Y1
S1
VCC
PIN DESCRIPTION
Name
D7-D0
Y7-Y0
I0, I1
S0, S1
CLK
I/O
I
O
I
I
I
I
Description
Data Inputs
Data Outputs - Three State
Register Load Control
Register Output Select
Clock Pulse
Output Enable
OE
2
QUALITY SEMICONDUCTOR, INC.
MDSL-00002-02
QS29FCT520T, 521T, 2520T, 2521T
FUNCTION TABLES
REGISTER LOAD CONTROL
REGISTER LOAD CONTROL
PART
NO
Register Control Code
I1,0 = LL = 0
I1,0 = LH = 1
I1,0 = HL = 2
I1,0 = HH = 3
FCT520
A1
B1
A1
B1
A1
B1
Hold
Data
A2
B2
A2
B2
A2
B2
3
FCT521
A1
B1
A1
B1
A1
B1
Hold
Data
A2
B2
A2
B2
A2
B2
REGISTER OUTPUT SELECTION
REGISTER OUTPUT SELECTION
S1
S0
OE
Yi
Register to Y0-Y7
L
S1
L
L
H
L
H
H
H
X
X
L
S0
H
L
L
H
H
L
H
X
X
OE
L
L
L
L
L
L
L
H
H
L
Data
Y1
Data
Data
Data
Data
Data
Data
Data
Hi-Z
Hi-Z
B2
Register to Y7-Y0
B2 B1
B1 A2
A2 A1
A1
Outputs Disabled
Outputs Disabled
MDSL-00002-02
QUALITY SEMICONDUCTOR, INC.
3
QS29FCT520T, 521T, 2520T, 2521T
ABSOLUTE MAXIMUM RATINGS
Supply Voltage to Ground .............................................. –0.5V to +7.0V
DC Output Voltage V
OUT
............................................... –0.5V to +7.0V
DC Input Voltage V
IN
.......................................................–0.5V to +7.0V
AC Input Voltage (for a pulse width
≤
20 ns) ................................. –3.0V
DC Input Diode Current with V
IN
< 0 ........................................... –20 mA
DC Output Diode Current with V
OUT
< 0 ..................................... –50 mA
DC Output Current Max. Sink Current/Pin ................................. 120 mA
Maximum Power Dissipation .................................................... 0.5 watts
T
STG
Storage Temperature ............................................. –65° to +150°C
Note:
Stresses greater than
those listed under ABSOLUTE
MAXIMUM RATINGS may
cause permanent damage to
this device resulting in func-
tional or reliability type failures.
CAPACITANCE
T
A
= 25°C, f = 1 MHz, V
IN
= 0V, V
OUT
= 0V
Pins
1-11, 13, 22, 23
14-21
—
SOIC
4
6
8
QSOP
4
6
8
PDIP
5
7
9
ZIP
7
9
10
Unit
pF
pF
pF
Note:
Capacitance is characterized but not tested.
POWER SUPPLY CHARACTERISTICS
Symbol
Icc
∆Icc
Qccd
Parameter
Quiescent Power
Supply Current
Supply Current per
Input @ TTL HIGH
Supply Current per
Input per MHz
Test Conditions
(1)
Vcc = Max., freq = 0
0V
≤
V
IN
≤
0.2V or Vcc-0.2V
≤
V
IN
≤
Vcc
Vcc = Max., V
IN
= 3.4V, freq = 0
(2)
Vcc = Max., Outputs Open and Enabled
One Bit Toggling @ 50% Duty Cycle
Other Inputs at GND or Vcc
(3,4)
Min
—
—
—
Max
1.5
2.0
0.25
Unit
mA
mA
mA/
MHz
Notes:
1. For conditions shown as Min. or Max., use the appropriate values specified under DC specifications.
2. Per TTL driven input (V
IN
= 3.4V).
3. For flip-flops, Qccd is measured by switching one of the data input pins so that the output changes every clock cycle.
This is a measurement of device power consumption only and does not include power to drive load capacitance or tester
capacitance. This parameter is guaranteed by design but not tested.
4. Ic can be computed using the above parameters as explained in the Technical Overview section.
4
QUALITY SEMICONDUCTOR, INC.
MDSL-00002-02
QS29FCT520T, 521T, 2520T, 2521T
DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE
Commercial T
A
= 0°C to 70°C, V
CC
= 5.0V
±
5%
Symbol
V
IH
V
IL
∆V
T
| I
IH
|
| I
IL
|
| I
OZ
|
I
OS
I
OR
V
IC
V
OH
V
OL
V
OL
R
OUT
Parameter
Input HIGH Voltage
Input LOW Voltage
Input Hysteresis
Input Current
Input HIGH or LOW
Off-State Output
Current (Hi-Z)
Short Circuit Current
(FCTXXX)
Current Drive
(FCT2XXX)
Input Clamp Voltage
Output HIGH Voltage
Output LOW Voltage
(FCTXXX)
Output LOW Voltage
(FCT2XXX – 25Ω)
Output Resistance
(FCT2XXX – 25Ω)
Test Conditions
Logic HIGH for All Inputs
Logic LOW for All Inputs
V
TLH
– V
THL
for All Inputs
Vcc = Max., 0
≤
V
IN
< Vcc
Vcc = Max., 0
≤
V
IN
≤
Vcc
Vcc = Max., V
OUT
= GND
(2,3)
Vcc = Min., V
OUT
= 2.0V
(3)
Vcc = Min., I
IN
= –18 mA, T
A
= 25°C
(3)
Vcc = Min.,
Vcc = Min.,
Vcc = Min.,
Vcc = Min.,
I
OH
= –12 mA (MIL)
I
OH
= –15 mA (COM)
I
OL
= 32 mA (MIL)
I
OL
= 48 mA (COM)
I
OL
= 12 mA (MIL)
I
OL
= 12 mA (COM)
I
OL
= 12 mA (MIL)
I
OL
= 12 mA (COM)
Military T
A
= –55°C to 125°C, V
CC
= 5.0V
±
10%
Min
2.0
—
—
—
—
–60
50
—
2.4
2.4
—
—
—
—
—
20
Typ
(1)
—
—
0.2
—
—
—
—
–0.7
—
—
—
—
—
—
25
28
Max
—
0.8
—
5
5
—
—
–1.2
—
—
0.50
0.50
0.50
0.50
—
40
Unit
V
V
V
µA
µA
mA
mA
V
V
V
V
Ω
3
Notes:
1. Typical values indicate Vcc = 5.0V and T
A
= 25°C.
2. Not more than one output should be shorted and the duration is
≤1
second.
3. These parameters are guaranteed by design but not tested.
MDSL-00002-02
QUALITY SEMICONDUCTOR, INC.
5
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