74FCT16373ATPVCG4 [TI]
16-Bit Latches;型号: | 74FCT16373ATPVCG4 |
厂家: | TEXAS INSTRUMENTS |
描述: | 16-Bit Latches |
文件: | 总7页 (文件大小:63K) |
中文: | 中文翻译 | 下载: | 下载PDF数据表文档文件 |
Data sheet acquired from Cypress Semiconductor Corporation.
Data sheet modified to remove devices not offered.
CY74FCT16373T
CY74FCT162373T
SCCS054 - August 1994 - Revised March 2000
16-Bit Latches
Features
Functional Description
• FCT-E speed at 3.4 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 −40˚C to +85˚C
• VCC = 5V ± 10%
CY74FCT16373T and CY74FCT162373T are 16-bit D-type
latches designed for use in bus applications requiring high
speed and low power. These devices can be used as two
independent 8-bit latches or as a single 16-bit latch by
connecting the Output Enable (OE) and Latch (LE) 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 CY74FCT16373T is ideally suited for driving
high-capacitance loads and low-impedance backplanes.
The CY74FCT162373T 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
CY74FCT162373T is ideal for driving transmission lines.
CY74FCT16373T Features:
• 64 mA sink current, 32 mA source current
• Typical VOLP (ground bounce) <1.0V at VCC = 5V,
TA = 25˚C
CY74FCT162373T Features:
• Balanced 24 mA output drivers
• Reduced system switching noise
• Typical VOLP (ground bounce) <0.6V at VCC = 5V,
TA= 25˚C
Pin Configuration
Logic Block Diagrams
SSOP/TSSOP
Top View
OE
1
1
48
47
46
45
44
43
42
41
OE
O
LE
1
1
1
LE
D
1
1
2
1
1
2
O
D
2
3
1
1
D
C
D
1
1
GND
O
4
GND
D
O
1
1
5
1
1
3
4
1
1
3
4
O
D
6
V
CC
V
CC
7
O
D
1
1
5
6
1
1
5
6
8
O
D
9
40
39
38
TO 7 OTHERCHANNELS
GND
GND
10
11
O
D
1
1
7
8
1
1
7
8
FCT162373-1
O
D
12
13
37
36
35
34
33
OE
LE
2
O
O
D
D
2
2
1
2
2
1
14
15
16
17
18
2
2
GND
GND
2
O
3
O
4
D
D
2
2
3
D
C
D
1
32
31
30
29
28
27
26
25
2
2
2
4
O
1
2
V
CC
V
CC
O
5
D
5
19
20
21
22
23
24
2
2
2
2
O
6
D
6
GND
O
GND
D
2
2
7
8
2
7
8
TO 7 OTHERCHANNELS
O
D
2
2
OE
LE
2
FCT162373-2
FCT162373-3
Copyright © 2000, Texas Instruments Incorporated
CY74FCT16373T
CY74FCT162373T
Maximum Ratings[2, 3]
Pin Description
Name
Description
(Above which the useful life may be impaired. For user
guidelines, not tested.)
D
Data Inputs
Storage Temperature...................... Com’l −55°C to +125°C
LE
OE
O
Latch Enable Inputs (Active HIGH)
Output Enable Inputs (Active LOW)
Three-State Outputs
Ambient Temperature with
Power Applied................................. Com’l −55°C to +125°C
DC Input Voltage .................................................−0.5V to +7.0V
DC Output Voltage ..............................................−0.5V to +7.0V
Function Table[1]
DC Output Current
(Maximum Sink Current/Pin) ...........................−60 to +120 mA
Inputs
Outputs
Power Dissipation..........................................................1.0W
D
H
L
LE
H
H
L
OE
L
O
H
Static Discharge Voltage............................................>2001V
(per MIL-STD-883, Method 3015)
L
L
Operating Range
X
X
L
Q0
Z
X
H
Ambient
Range
Industrial
Temperature
VCC
−40°C to +85°C
5V ± 10%
Electrical Characteristics Over the Operating Range
Parameter
Description
Input HIGH Voltage
Test Conditions
Min.
Typ.[4]
Max.
Unit
VIH
VIL
VH
VIK
IIH
2.0
V
V
Input LOW Voltage
Input Hysteresis[5]
0.8
100
mV
V
Input Clamp Diode Voltage
Input HIGH Current
Input LOW Current
VCC=Min., IIN=−18 mA
−0.7
−1.2
±1
VCC=Max., VI=VCC
VCC=Max., VI=GND
VCC=Max., VOUT=2.7V
µA
µA
µA
IIL
±1
IOZH
High Impedance Output Current
(Three-State Output pins)
±1
IOZL
High Impedance Output Current
(Three-State Output pins)
VCC=Max., VOUT=0.5V
±1
µA
IOS
IO
Short Circuit Current[6]
Output Drive Current[6]
Power-Off Disable
VCC=Max., VOUT=GND
VCC=Max., VOUT=2.5V
VCC=0V, VOUT≤4.5V[7]
−80
−50
−140
−200
−180
±1
mA
mA
µA
IOFF
Output Drive Characteristics for CY74FCT16373T
Parameter
Description
Test Conditions
VCC=Min., IOH=−3 mA
Min.
2.5
Typ.[4]
3.5
Max.
Unit
V
VOH
Output HIGH Voltage
VCC=Min., IOH=−15 mA
VCC=Min., IOH=−32 mA
VCC=Min., IOL=64 mA
2.4
3.5
V
2.0
3.0
V
VOL
Output LOW Voltage
0.2
0.55
V
Notes:
1. H = HIGH Voltage Level. L = LOW Voltage Level. X = Don’t Care. Z = High Impedance. Q0=Previous state of flip-flop.
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 VCC or ground.
4. Typical values are at VCC=5.0V, TA= +25˚C 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, IOS tests should be performed last.
7. Tested at +25˚C.
2
CY74FCT16373T
CY74FCT162373T
Output Drive Characteristics for CY74FCT162373T
Parameter
IODL
Description
Output LOW Current[6]
Output HIGH Current[6]
Output HIGH Voltage
Output LOW Voltage
Test Conditions
VCC=5V, VIN=VIH or VIL, VOUT=1.5V
VCC=5V, VIN=VIH or VIL, VOUT=1.5V
VCC=Min., IOH=−24 mA
Min.
60
Typ.[4]
115
Max.
150
Unit
mA
mA
V
IODH
−60
2.4
−115
3.3
−150
VOH
VOL
VCC=Min., IOL=24 mA
0.3
0.55
V
Capacitance[5] (TA = +25˚C, f = 1.0 MHz)
Parameter
CIN
Description
Input Capacitance
Output Capacitance
Test Conditions
VIN = 0V
Typ.[4] Max.
Unit
pF
4.5
5.5
6.0
8.0
COUT
VOUT = 0V
pF
Power Supply Characteristics
Parameter
Description
Test Conditions
Typ.[4]
Max.
Unit
ICC
Quiescent Power Supply Current VCC=Max.
V
IN≤0.2V,
5
500
µA
VIN≥VCC−0.2V
∆ICC
QuiescentPowerSupplyCurrent VCC=Max.
(TTL inputs HIGH)
VIN=3.4V[8]
0.5
60
1.5
mA
ICCD
Dynamic Power Supply
Current[9]
VCC=Max., One Input
Toggling, 50% Duty Cycle,
Outputs Open, OE=GND
VIN=VCC or
VIN=GND
100
µA/MHz
IC
Total Power Supply Current[10]
VCC=Max., f1=10 MHz,
50% Duty Cycle, Outputs
Open, One Bit Toggling,
OE=GND, LE=VCC
VIN=VCC or
VIN=GND
0.6
0.9
2.4
6.4
1.5
2.3
mA
mA
mA
mA
VIN=3.4V or
VIN=GND
VCC=Max., f1=2.5 MHz,
50% Duty Cycle, Outputs
Open, Sixteen Bits Toggling,
OE=GND, LE=VCC
VIN=VCC or
VIN=GND
4.5[11]
16.5[11]
VIN=3.4V or
VIN=GND
Notes:
8. Per TTL driven input (VIN=3.4V); all other inputs at VCC or GND.
9. This parameter is not directly testable, but is derived for use in Total Power Supply calculations.
10. IC= IQUIESCENT + IINPUTS + IDYNAMIC
IC
=
=
=
=
=
=
=
=
=
ICC+∆ICCDHNT+ICCD(f0/2 + f1N1)
ICC
∆ICC
DH
NT
ICCD
f0
Quiescent Current with CMOS input levels
Power Supply Current for a TTL HIGH input(VIN=3.4V)
Duty Cycle for TTL inputs HIGH
Number of TTL inputs at DH
Dynamic Current caused by an input transition pair (HLH or LHL)
Clock frequency for registered devices, otherwise zero
Input signal frequency
f1
N1
Number of inputs changing at f1
All currents are in milliamps and all frequencies are in megahertz.
11. Values for these conditions are examples of the ICC formula. These limits are specified but not tested.
3
CY74FCT16373T
CY74FCT162373T
Switching Characteristics Over the Operating Range[12]
CY74FCT16373AT
CY74FCT162373AT
Parameter
Description
Propagation Delay D to O
Min.
Max.
Unit
Fig. No.[13]
tPLH
tPHL
1.5
5.2
ns
1, 3
tPLH
tPHL
Propagation Delay
LE to O
2.0
1.5
1.5
6.7
6.1
5.5
ns
ns
ns
1, 5
tPZH
tPZL
Output Enable Time
1, 7, 8
1, 7, 8
tPHZ
tPLZ
Output Disable Time
tSU
tH
Set-Up Time HIGH or LOW, D to LE
Hold Time HIGH or LOW, D to LE
LE Pulse Width HIGH
2.0
1.5
3.3
ns
ns
ns
ns
9
9
tW
5
tSK(O)
Output Skew[14]
0.5
—
CY74FCT16373CT
CY74FCT16373ET
CY74FCT162373CT CY74FCT162373ET
Parameter
Description
Min.
Max.
Min.
Max.
Unit
Fig. No.[13]
tPLH
tPHL
Propagation Delay
D to O
1.5
4.2
1.5
3.4
ns
1, 3
tPLH
tPHL
Propagation Delay
LE to O
2.0
1.5
1.5
5.5
5.5
5.0
2.0
1.5
1.5
3.7
4.4
3.6
ns
ns
ns
1, 5
tPZH
tPZL
Output Enable Time
1, 7, 8
1, 7, 8
tPHZ
tPLZ
Output Disable Time
tSU
tH
Set-Up Time HIGH or LOW, D to LE
2.0
1.5
1.0
1.0
ns
ns
9
9
Hold Time HIGH or LOW,
D to LE
tW
LE Pulse Width HIGH
Output Skew[14]
3.3
3.0
ns
ns
5
tSK(O)
0.5
0.5
—
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.
4
CY74FCT16373T
CY74FCT162373T
Ordering Information CY74FCT16373
Speed
Package
Name
Operating
Range
(ns)
Ordering Code
CY74FCT16373ETPACT
CY74FCT16373ETPVC/PVCT
CY74FCT16373CTPACT
CY74FCT16373CTPVC/PVCT
CY74FCT16373ATPACT
Package Type
48-Lead (240-Mil) TSSOP
3.4
Z48
O48
Z48
O48
Z48
O48
Industrial
Industrial
Industrial
48-Lead (300-Mil) SSOP
48-Lead (240-Mil) TSSOP
48-Lead (300-Mil) SSOP
48-Lead (240-Mil) TSSOP
48-Lead (300-Mil) SSOP
4.2
5.2
CY74FCT16373ATPVC/PVCT
Ordering Information CY74FCT162373
Speed
Package
Name
Operating
Range
(ns)
Ordering Code
74FCT162373ETPACT
CY74FCT162373ETPVC
74FCT162373ETPVCT
74FCT162373CTPACT
CY74FCT162373CTPVC
74FCT162373CTPVCT
74FCT162373ATPACT
CY74FCT162373ATPVC
74FCT162373ATPVCT
Package Type
3.4
Z48
O48
O48
Z48
O48
O48
Z48
O48
O48
48-Lead (240-Mil) TSSOP
48-Lead (300-Mil) SSOP
48-Lead (300-Mil) SSOP
48-Lead (240-Mil) TSSOP
48-Lead (300-Mil) SSOP
48-Lead (300-Mil) SSOP
48-Lead (240-Mil) TSSOP
48-Lead (300-Mil) SSOP
48-Lead (300-Mil) SSOP
Industrial
Industrial
Industrial
4.2
5.2
5
CY74FCT16373T
CY74FCT162373T
Package Diagrams
48-Lead Shrunk Small Outline Package O48
48-Lead Thin Shrunk Small Outline Package Z48
6
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Copyright 2000, Texas Instruments Incorporated
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