16 -Bit Registers
f
ax id: 7030
CY74FCT16374T
CY74FCT162374T
Cypress Semiconductor Corporation • 3901 North First Street • San Jose • CA 95134 • 408-943-2600
Au
g
ust 1994 - Revised October 30
,
1997
2
374T
Features
• Low pow er, pin- com pati ble rep lacement for ABT
functions
• FCT-E speed at 3.7 ns
• Power-off disable outputs permits live insertion
• Edge-rate control cir cuitry for signif icantly improved
noise characteristics
• Typical output skew < 250 ps
• ESD > 2000V
• TSSOP (19.6 -mil pit ch) and SSOP (25-mil pitc h)
packages
• Industrial temperature range of −40°C to +85°C
•V
CC = 5V ± 10%
CY74FCT16374T Features:
• 64 mA sink current, 32 mA source current
• Typical VOLP (ground bounce) <1.0V at VCC = 5V,
TA = 25°C
CY74FCT162374 T Feat ures:
• B alanced 24 mA output drivers
• R educed system switching noise
• Typical VOLP (ground bounce) <0.6V at VCC = 5V,
TA= 25°C
Functional Descripti on
CY74FCT16374T and CY74FCT162374T are 16-bit D-type
regis ters d esigned f or us e as b uff ered r egist ers in hi gh-speed ,
low p ower b us appli cations . These devices can be u sed 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 simpli-
fying board layout. The output buffers are designed with
power-off disable feature that allows live inser tion 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 mini-
mal undershoot and reduced ground bounce. The
CY74FCT162374T is ideal for driving transm ission lines.
Logic Block Diagrams Pin Configuration
D
C
1OE
FCT162374-1
1CLK
1D11O1
TO 7 OTHER CHANNELS
D
C
2OE
FCT162374-2
2CLK
2D12O1
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
1OE
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
1O1
1O2
1O3
1O4
1D1
1D2
1D3
1D4
1CLK
GND
GND
VCC
1O7
1O8
1O5
1O6
1D5
1D6
1D7
1D8
VCC
GND
GND
2O3
2O4
2O1
2O2
2D1
2D2
2D3
2D4
GND
GND
VCC
2O7
2O8
2O5
2O6
2D5
2D6
2D7
2D8
VCC
GND
2OE 2CLK
TO 7 OTHER CHANNELS
CY74FCT16374T
CY74FCT162374T
2
Ma xi mu m R atings[2, 3]
(Above which the useful life may be impaired. For user
guidel ines, not tested .)
Storage Temperature ... .......... .. ..... .......... −55°C to +125°C
Ambient Temperature with
Powe r A p pl ie d....... .. ..... ... .... ... ..... .. ..... .. ... . −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
Powe r D is s ip a tio n . ..... .. ..... .. ..... ... ..... .. .. ..... ... ..... .. ..... .. ....1 .0 W
Static Discharge Voltage............................................>2001V
(per MIL -STD-883, Method 3015)
Function Table[1]
Inputs Outputs
FunctionDCLK 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 Descripti on
Name Description
DData Inputs
CLK Clock Inputs
OE Three-St ate Output Enable Inputs (Active LOW)
OThree-State Outputs
Operating Rang e
Range Ambient
Temperature VCC
Industrial −40°C to +85°C 5V ± 10%
Elec tr ic al C h ar acte r is ti cs O ver the Operating Range
Parameter Description Test Conditions Min. Typ.[4] Max. Unit
VIH Input HIGH Voltage 2.0 V
VIL Input LOW Voltage 0.8 V
VHInput Hysteresis[5] 100 mV
VIK Input Clamp Diode Voltage VCC=Min., IIN=−18 mA −0.7 −1.2 V
IIH Input HIGH Current VCC= M a x ., V I=VCC ±1µA
IIL Input LOW Current VCC= M a x ., V I=GND ±1µA
IOZH High I mp edance Output Curr ent
(Three-State Output pins) VCC= M a x ., VOUT=2.7V ±1µA
IOZL High I mp edance Output Curr ent
(Three-State Output pins) VCC= M a x ., VOUT=0.5V ±1µA
IOS Short Circuit Current[6] VCC= Ma x., VOUT=GND −80 −140 −200 mA
IOOutput Drive Current[6] VCC=M a x ., VOUT=2.5V −50 −180 mA
IOFF Power-Off Disable VCC=0V, VOUT≤4.5V[7] ±1µA
Output Drive Characteris ti cs f or CY74FCT16374T
Parameter Description Test Conditions Min. Typ.[4] Max. Unit
VOH Output HIGH Voltage VCC=Min., IOH=−3 mA 2.5 3.5 V
VCC=Min., IOH=−15 mA 2.4 3.5 V
VCC=Min., IOH=−32 mA 2.0 3.0 V
VOL Output LOW Voltage VCC=Min., IOL=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 lif e of the de vice. 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 a mbient.
5. This parameter is guaranteed but not tested.
6. Not more than one output should be shorted at a time. Duration of short should not e xceed one second. The use of high-speed test apparatus and/or sample
and hold techniques are pref erable in order to minimize internal chip heating and more accurately reflect operational values. Otherwise pr olonged shorting of
a high output ma y raise the chip temperature well above normal and thereby cause inv alid readings in other parametric tests. In any sequence of parameter
tests, IOS tests should be performed last.
7. Tested at +25°C.
CY74FCT16374T
CY74FCT162374T
3
Output D rive Characteristics for CY74FCT162374T
Parameter Description Test Condi tions Min. Typ.[4] Max. Unit
IODL Output LOW Current[6] VCC=5V, VIN=VIH or VIL, VOUT=1.5V 60 115 150 mA
IODH Output HIGH Current[6] VCC=5V, VIN=VIH or VIL, VOUT=1.5V −60 −115 −150 mA
VOH Output HIGH Voltage VCC=M in., IOH=−24 m A 2.4 3.3 V
VOL Ou tp ut LOW Volt age VCC=Mi n ., IOL=24 mA 0.3 0.55 V
Capacitance[5] (TA = +25° C, f = 1.0 MHz)
Parameter Description Test Conditions Typ.[4] Max. Unit
CIN Input Capacit ance VIN = 0V 4.5 6.0 pF
COUT Output Capacitance VOUT = 0V 5.5 8.0 pF
Pow er Supply Characteristics
Parameter Description Test Conditions Typ.[4] Max. Unit
ICC Quiesc ent P ower Supply Current VCC=Max. VIN≤0.2V,
VIN≥VCC−0.2V 5500 µA
∆ICC Quiescent Power Supply Current
(TTL inputs HIGH) VCC=Max. VIN=3.4V[8] 0.5 1.5 mA
ICCD Dynamic Power Supply
Current[9] VCC=Max., One Input
Toggli ng, 50% Duty Cycle,
Out puts Open, OE=GND
VIN=VCC or
VIN=GND 60 100 µA/
MHz
ICTotal Power Supply Current[10] VCC=Max., f0=10 MHz,
f1=5 MHz, 50% Duty Cycle,
Outputs Open, One Bit
Toggling, OE=GND
VIN=VCC or
VIN=GND 0.6 1.5 mA
VIN=3.4V or
VIN=GND 1.1 3.0 mA
VCC=Max., f0=10 MHz,
f1=2.5 MHz, 50% Duty
Cycle, Outputs Open, Sixteen
Bits Toggling, OE=GND
VIN=VCC or
VIN=GND 3.0 5.5[11] mA
VIN=3.4V or
VIN=GND 7.5 19.0[11] mA
Note:
8. Per TTL driven input (VIN=3.4V); all other inputs at VCC or GND.
9. This parameter is not directly testable, but is deriv ed for use in Total Power Supply calculations.
10. IC=I
QUIESCENT + IINPUTS + IDYNAMIC
IC=I
CC+∆ICCDHNT+ICCD(f0/2 + f1N1)
ICC = Quiescent Current with CMOS input levels
∆ICC = P ower Supply Current for a TTL HIGH input (VIN=3.4V)
DH = Duty Cycle for TTL inputs HIGH
NT = Number of TTL inputs at DH
ICCD = Dynamic Current caused by an input transition pair (HLH or LHL)
f0= Clock frequency for registered devices, otherwise zero
f1= Input signal frequency
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 guaranteed but not tested.
CY74FCT16374T
CY74FCT162374T
4
Swi tch i ng C h aracteri sti cs Ov er the Operating Range[12]
CY74FCT16374T
CY74FCT162374T CY74FCT16374AT
CY74FCT162374AT Fig.
No.[13]
Parameter Description Min. Max. Min. Max. Unit
tPLH
tPHL Propagati on De lay
CLK to O 2.0 10.0 2.0 6.5 ns 1, 5
tPZH
tPZL Outp ut Enable Ti me 1.5 12.5 1.5 6.5 ns 1, 7, 8
tPHZ
tPLZ Output Disab le Time 1.5 8.0 1.5 5.5 ns 1, 7, 8
tSU Set-Up Time HIGH or LOW,
D to CLK 2.0 2.0 ns 4
tHHold Time HIGH or LOW,
D to CLK 1.5 1.5 ns 4
tWCLK Pulse Widt h
HIGH or LOW 5.0 5.0 ns 5
tSK(O) Output Skew[14] 0.5 0.5 ns
CY74FCT16374CT
CY74FCT162374CT CY74FCT16374ET
CY74FCT162374ET Fig.
No.[13]
Parameter Description Min. Max. Min. Max. Unit
tPLH
tPHL Propagation Delay
CLK to O 2.0 5.2 2.0 3.7 ns 1, 5
tPZH
tPZL Outp ut Enable Time 1.5 5.5 1.5 4.4 ns 1, 7, 8
tPHZ
tPLZ Output Disable Time 1.5 5.0 1.5 3.6 ns 1, 7, 8
tSU Set-Up Time HIGH or LOW,
D to CLK 2.0 1.5 ns 4
tHHold Time HIGH or LOW,
D to CLK 1.5 0.0 ns 4
tWCLK Pulse Width
HIGH or LOW 3.3 3.0 ns 5
tSK(O) Output Skew[14] 0.5 0.5 ns
Notes:
12. Minimum limits are guaranteed 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 guaranteed by design.
CY74FCT16374T
CY74FCT162374T
5
Document #: 38-00391-C
Ordering Information CY74FCT16374T
Speed
(ns) Ordering Code Package
Name Package Type Operating
Range
3.7 CY74FCT16374ETPAC Z48 48-Lead (240-Mil) TSSOP Industrial
CY74FCT16374ETPVC O48 48-Lead (300-Mil) SSOP
5.2 CY74FCT16374CTPAC Z48 48-Lead (240-Mil) TSSOP Industrial
CY74FCT16374CTPVC O48 48-Lead (300-Mil) SSOP
6.5 CY74FCT16374ATPA C Z48 48-Lead (240-Mil) TSSOP Industrial
CY74FCT16374ATPVC O48 48-Lead (300-Mi l) SSOP
10.0 CY74FCT16374TPAC Z48 48-Lead (240-Mi l) TSSOP Industrial
CY74FCT16374TPVC O48 48-Lead (300-Mi l) SSOP
Ordering Information CY74FCT162374T
Speed
(ns) Ordering Code Package
Name Package Type Operating
Range
3.7 CY74FCT162374ETPAC Z48 48-Lead (240-Mil) TSSOP Industrial
CY74FCT162374ETPVC O48 48-Lead (300-Mi l) SSOP
5.2 CY74FCT162374CTPAC Z48 48-L ead (240-Mil ) TSSOP Industrial
CY74FCT162374CTPVC O48 48-Lead (300-Mi l) SSOP
6.5 CY74FCT162374ATPAC Z48 48-Lead (240-Mil) TSSOP Industrial
CY74FCT162374ATPVC O48 48-Lead (300-Mi l) SSOP
10.0 CY74FCT162374TPAC Z48 48-Lead (240-Mil) TSSOP Industrial
CY74FCT162374TPVC O48 48-Lead (300-Mi l) SSOP
CY74FCT16374T
CY74FCT162374T
© Cypress Semiconductor Corporation, 1997. The information contained herein is subject to change without notice. Cypress Semiconductor Corporation assumes no responsibility for the use
of any circui try other than circuitry embodied in a Cypress Semic onductor product. Nor does it conv ey or imply any license under patent or oth er rights . Cypress Semiconductor does not authorize
its products for use as critical components in life-support systems where a malfunction or failure may reasonably be expected to result in significant injury to the user. The inclusion of Cypress
Semiconductor products in life-support systems application implies that the manufacturer assumes all risk of such use and in doing so indemnifies Cypress Semiconductor against all charges.
Package Di ag ra ms
48-Lead Shrunk Small Outline Package O48
48-Lead Thin Shrunk Small Outline Package Z48
