16-Bit Registers
CY74FCT16374T
CY74FCT162374T
SCCS055 - August 1994 - Revised March 2000
Data sheet acquired from Cypress Semiconductor Corporation.
Data sheet modified to remove devices not offered.
Copyright
2000, Texas Instruments Incorporated
1CY74FCT162374T
Features
FCT-E speed at 3.7 ns
Power-off disable outputs permits live insertion
Edge-rate control circuitry for significantly improved
noise characteristics
Typical output skew < 250 ps
ESD > 2000V
TSSOP (19.6-mil pitch) and SSOP (25-mil pitch)
packages
Industrial temperature range of
-
40C to +85C
V
CC
= 5V
10%
CY74FCT16374T Features:
64 mA sink current, 32 mA source current
Typical V
OLP
(ground bounce) <1.0V at V
CC
= 5V,
T
A
= 25C
CY74FCT162374T Features:
Balanced 24 mA output drivers
Reduced system switching noise
Typical V
OLP
(ground bounce) <0.6V at V
CC
= 5V,
T
A
= 25C
Functional Description
CY74FCT16374T and CY74FCT162374T are 16-bit D-type
registers designed for use as buffered registers in high-speed,
low power bus applications. These devices can be used as two
independent 8-bit registers or as a single 16-bit register by
connecting the output Enable (OE) and Clock (CLK) inputs.
Flow-through pinout and small shrink packaging aid in
simplifying board layout. The output buffers are designed with
power-off disable feature that allows live insertion of boards.
The
CY74FCT16374T
is
ideally
suited
for
driving
high-capacitance loads and low-impedance backplanes.
The CY74FCT162374T has 24-mA balanced output drivers
with current limiting resistors in the outputs. This reduces the
need for external terminating resistors and provides for
minimal undershoot and reduced ground bounce. The
CY74FCT162374T is ideal for driving transmission lines.
Logic Block Diagrams
Pin Configuration
D
C
1
OE
FCT162374-1
1
CLK
1
D
1
1
O
1
TO 7 OTHER CHANNELS
D
C
2
OE
FCT162374-2
2
CLK
2
D
1
2
O
1
FCT162374-3
GND
1
2
3
4
5
6
7
8
9
10
11
12
33
32
31
30
29
25
26
27
28
36
35
1
OE
34
SSOP/TSSOP
Top View
13
14
15
16
17
18
19
20
21
22
23
24
45
44
43
42
41
37
38
39
40
48
47
46
1
O
1
1
O
2
1
O
3
1
O
4
1
D
1
1
D
2
1
D
3
1
D
4
1
CLK
GND
GND
V
CC
1
O
7
1
O
8
1
O
5
1
O
6
1
D
5
1
D
6
1
D
7
1
D
8
V
CC
GND
GND
2
O
3
2
O
4
2
O
1
2
O
2
2
D
1
2
D
2
2
D
3
2
D
4
GND
GND
V
CC
2
O
7
2
O
8
2
O
5
2
O
6
2
D
5
2
D
6
2
D
7
2
D
8
V
CC
GND
2
OE
2
CLK
TO 7 OTHER CHANNELS
CY74FCT16374T
CY74FCT162374T
2
Maximum Ratings
[2, 3]
(Above which the useful life may be impaired. For user
guidelines, not tested.)
Storage Temperature ..............................
-
55
C to +125
C
Ambient Temperature with
Power Applied ..........................................
-
55
C to +125
C
DC Input Voltage
................................................. -
0.5V to +7.0V
DC Output Voltage
.............................................. -
0.5V to +7.0V
DC Output Current
(Maximum Sink Current/Pin)
............................-
60 to +120 mA
Power Dissipation ..........................................................1.0W
Static Discharge Voltage............................................>2001V
(per MIL-STD-883, Method 3015)
Function Table
[1]
Inputs
Outputs
Function
D
CLK
OE
O
X
L
H
Z
High-Z
X
H
H
Z
L
L
L
Load
Register
H
L
H
L
H
Z
H
H
Z
Pin Description
Name
Description
D
Data Inputs
CLK
Clock Inputs
OE
Three-State Output Enable Inputs (Active LOW)
O
Three-State Outputs
Operating Range
Range
Ambient
Temperature
V
CC
Industrial
-
40
C to +85
C
5V
10%
Electrical Characteristics
Over the Operating Range
Parameter
Description
Test Conditions
Min.
Typ.
[4]
Max.
Unit
V
IH
Input HIGH Voltage
2.0
V
V
IL
Input LOW Voltage
0.8
V
V
H
Input Hysteresis
[5]
100
mV
V
IK
Input Clamp Diode Voltage
V
CC
=Min., I
IN
=
-
18 mA
-
0.7
-
1.2
V
I
IH
Input HIGH Current
V
CC
=Max., V
I
=V
CC
1
A
I
IL
Input LOW Current
V
CC
=Max., V
I
=GND
1
A
I
OZH
High Impedance Output Current
(Three-State Output pins)
V
CC
=Max., V
OUT
=2.7V
1
A
I
OZL
High Impedance Output Current
(Three-State Output pins)
V
CC
=Max., V
OUT
=0.5V
1
A
I
OS
Short Circuit Current
[6]
V
CC
=Max., V
OUT
=GND
-
80
-
140
-
200
mA
I
O
Output Drive Current
[6]
V
CC
=Max., V
OUT
=2.5V
-
50
-
180
mA
I
OFF
Power-Off Disable
V
CC
=0V, V
OUT
4.5V
[7]
1
A
Output Drive Characteristics for CY74FCT16374T
Parameter
Description
Test Conditions
Min.
Typ.
[4]
Max.
Unit
V
OH
Output HIGH Voltage
V
CC
=Min., I
OH
=
-
3 mA
2.5
3.5
V
V
CC
=Min., I
OH
=
-
15 mA
2.4
3.5
V
V
CC
=Min., I
OH
=
-
32 mA
2.0
3.0
V
V
OL
Output LOW Voltage
V
CC
=Min., I
OL
=64 mA
0.2
0.55
V
Notes:
1.
H = HIGH Voltage Level. L = LOW Voltage Level. X = Don't Care. Z = HIGH Impedance.
= LOW-to-HIGH Transition.
2.
Operation beyond the limits set forth may impair the useful life of the device. Unless otherwise noted, these limits are over the operating free-air temperature
range.
3.
Unused inputs must always be connected to an appropriate logic voltage level, preferably either V
CC
or ground.
4.
Typical values are at V
CC
= 5.0V, T
A
= +25C ambient.
5.
This parameter is specified but not tested.
6.
Not more than one output should be shorted at a time. Duration of short should not exceed one second. The use of high-speed test apparatus and/or sample
and hold techniques are preferable in order to minimize internal chip heating and more accurately reflect operational values. Otherwise prolonged shorting of
a high output may raise the chip temperature well above normal and thereby cause invalid readings in other parametric tests. In any sequence of parameter
tests, I
OS
tests should be performed last.
7.
Tested at +25C.
CY74FCT16374T
CY74FCT162374T
3
Output Drive Characteristics for CY74FCT162374T
Parameter
Description
Test Conditions
Min.
Typ.
[4]
Max.
Unit
I
ODL
Output LOW Current
[6]
V
CC
=5V, V
IN
=V
IH
or V
IL
, V
OUT
=1.5V
60
115
150
mA
I
ODH
Output HIGH Current
[6]
V
CC
=5V, V
IN
=V
IH
or V
IL
, V
OUT
=1.5V
-
60
-
115
-
150
mA
V
OH
Output HIGH Voltage
V
CC
=Min., I
OH
=
-
24 mA
2.4
3.3
V
V
OL
Output LOW Voltage
V
CC
=Min., I
OL
=24 mA
0.3
0.55
V
Capacitance
[5]
(T
A
= +25C, f = 1.0 MHz)
Parameter
Description
Test Conditions
Typ.
[4]
Max.
Unit
C
IN
Input Capacitance
V
IN
= 0V
4.5
6.0
pF
C
OUT
Output Capacitance
V
OUT
= 0V
5.5
8.0
pF
Power Supply Characteristics
Parameter
Description
Test Conditions
Typ.
[4]
Max.
Unit
I
CC
Quiescent Power Supply Current V
CC
=Max.
V
IN
0.2V,
V
IN
V
CC
-
0.2V
5
500
A
I
CC
Quiescent Power Supply Current
(TTL inputs HIGH)
V
CC
=Max.
V
IN
=3.4V
[8]
0.5
1.5
mA
I
CCD
Dynamic Power Supply
Current
[9]
V
CC
=Max., One Input
Toggling, 50% Duty Cycle,
Outputs Open, OE=GND
V
IN
=V
CC
or
V
IN
=GND
60
100
A/
MHz
I
C
Total Power Supply Current
[10]
V
CC
=Max., f
0
=10 MHz,
f
1
=5 MHz, 50% Duty Cycle,
Outputs Open, One Bit
Toggling, OE=GND
V
IN
=V
CC
or
V
IN
=GND
0.6
1.5
mA
V
IN
=3.4V or
V
IN
=GND
1.1
3.0
mA
V
CC
=Max., f
0
=10 MHz,
f
1
=2.5 MHz, 50% Duty
Cycle, Outputs Open, Sixteen
Bits Toggling, OE=GND
V
IN
=V
CC
or
V
IN
=GND
3.0
5.5
[11]
mA
V
IN
=3.4V or
V
IN
=GND
7.5
19.0
[11]
mA
Note:
8.
Per TTL driven input (V
IN
=3.4V); all other inputs at V
CC
or GND.
9.
This parameter is not directly testable, but is derived for use in Total Power Supply calculations.
10. I
C
=
I
QUIESCENT
+ I
INPUTS
+ I
DYNAMIC
I
C
=
I
CC
+
I
CC
D
H
N
T
+I
CCD
(f
0
/2 + f
1
N
1
)
I
CC
=
Quiescent Current with CMOS input levels
I
CC
=
Power Supply Current for a TTL HIGH input (V
IN
=3.4V)
D
H
=
Duty Cycle for TTL inputs HIGH
N
T
=
Number of TTL inputs at D
H
I
CCD
=
Dynamic Current caused by an input transition pair (HLH or LHL)
f
0
=
Clock frequency for registered devices, otherwise zero
f
1
=
Input signal frequency
N
1
=
Number of inputs changing at f
1
All currents are in milliamps and all frequencies are in megahertz.
11. Values for these conditions are examples of the I
CC
formula. These limits are specified but not tested.
CY74FCT16374T
CY74FCT162374T
4
Switching Characteristics
Over the Operating Range
[12]
CY74FCT16374T
CY74FCT162374T
CY74FCT16374AT
CY74FCT162374AT
Fig.
No.
[13]
Parameter
Description
Min.
Max.
Min.
Max.
Unit
t
PLH
t
PHL
Propagation Delay
CLK to O
2.0
10.0
2.0
6.5
ns
1, 5
t
PZH
t
PZL
Output Enable Time
1.5
12.5
1.5
6.5
ns
1, 7, 8
t
PHZ
t
PLZ
Output Disable Time
1.5
8.0
1.5
5.5
ns
1, 7, 8
t
SU
Set-Up Time HIGH or LOW,
D to CLK
2.0
2.0
ns
4
t
H
Hold Time HIGH or LOW,
D to CLK
1.5
1.5
ns
4
t
W
CLK Pulse Width
HIGH or LOW
5.0
5.0
ns
5
t
SK(O)
Output Skew
[14]
0.5
0.5
ns
CY74FCT16374CT
CY74FCT162374CT
CY74FCT16374ET
CY74FCT162374ET
Fig.
No.
[13]
Parameter
Description
Min.
Max.
Min.
Max.
Unit
t
PLH
t
PHL
Propagation Delay
CLK to O
2.0
5.2
2.0
3.7
ns
1, 5
t
PZH
t
PZL
Output Enable Time
1.5
5.5
1.5
4.4
ns
1, 7, 8
t
PHZ
t
PLZ
Output Disable Time
1.5
5.0
1.5
3.6
ns
1, 7, 8
t
SU
Set-Up Time HIGH or LOW,
D to CLK
2.0
1.5
ns
4
t
H
Hold Time HIGH or LOW,
D to CLK
1.5
0.0
ns
4
t
W
CLK Pulse Width
HIGH or LOW
3.3
3.0
ns
5
t
SK(O)
Output Skew
[14]
0.5
0.5
ns
Notes:
12. Minimum limits are specified but not tested on Propagation Delays.
13. See "Parameter Measurement Information" in the General Information section.
14. Skew between any two outputs of the same package switching in the same direction. This parameter is ensured by design.
CY74FCT16374T
CY74FCT162374T
5
Ordering Information CY74FCT16374T
Speed
(ns)
Ordering Code
Package
Name
Package Type
Operating
Range
3.7
CY74FCT16374ETPACT
Z48
48-Lead (240-Mil) TSSOP
Industrial
CY74FCT16374ETPVC/PVCT
O48
48-Lead (300-Mil) SSOP
5.2
CY74FCT16374CTPACT
Z48
48-Lead (240-Mil) TSSOP
Industrial
CY74FCT16374CTPVC/PVCT
O48
48-Lead (300-Mil) SSOP
6.5
CY74FCT16374ATPACT
Z48
48-Lead (240-Mil) TSSOP
Industrial
CY74FCT16374ATPVC/PVCT
O48
48-Lead (300-Mil) SSOP
10.0
CY74FCT16374TPVC/PVCT
O48
48-Lead (300-Mil) SSOP
Industrial
Ordering Information CY74FCT162374T
Speed
(ns)
Ordering Code
Package
Name
Package Type
Operating
Range
3.7
74FCT162374ETPACT
Z48
48-Lead (240-Mil) TSSOP
Industrial
CY74FCT162374ETPVC
O48
48-Lead (300-Mil) SSOP
74FCT162374ETPVCT
O48
48-Lead (300-Mil) SSOP
5.2
74FCT162374CTPACT
Z48
48-Lead (240-Mil) TSSOP
Industrial
CY74FCT162374CTPVC
O48
48-Lead (300-Mil) SSOP
74FCT162374CTPVCT
O48
48-Lead (300-Mil) SSOP
6.5
74FCT162374ATPACT
Z48
48-Lead (240-Mil) TSSOP
Industrial
CY74FCT162374ATPVC
O48
48-Lead (300-Mil) SSOP
74FCT162374ATPVCT
O48
48-Lead (300-Mil) SSOP
10.0
CY74FCT162374TPVC/PVCT
O48
48-Lead (300-Mil) SSOP
Industrial
CY74FCT16374T
CY74FCT162374T
6
Package Diagrams
48-Lead Shrunk Small Outline Package O48
48-Lead Thin Shrunk Small Outline Package Z48
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accordance with TI's standard warranty. Testing and other quality control techniques are utilized to the extent
TI deems necessary to support this warranty. Specific testing of all parameters of each device is not necessarily
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Copyright
2000, Texas Instruments Incorporated
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