PI74LPT16374
3.3V 16-BIT REGISTER (3-STATE)
1
PS2070A 01/16/97
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PI74LPT16374
Fast CMOS 3.3V
16-Bit Register (3-State)
Product Features
Compatible with LCXTM and LVTTM families of products
Supports 5V Tolerant Mixed Signal Mode Operation
Input can be 3V or 5V
Output can be 3V or connected to 5V bus
Advanced Low Power CMOS Operation
Excellent output drive capability:
Balanced drives (24 mA sink and source)
Pin compatible with industry standard double-density
pinouts
Low ground bounce outputs
Hysteresis on all inputs
ESD Protection exceeds 2000V
Industrial operating temperature range: 40C to +85C
Multiple center pins and distributed Vcc/GND pins
minimize switching noise
Packages available:
48-pin 240 mil wide plastic TSSOP (A)
48-pin 300 mil wide plastic SSOP (V)
Product Description
Pericom Semiconductor's PI74LPT series of logic circuits are
produced in the Company's advanced 0.6 micron CMOS tech-
nology, achieving industry leading speed grades.
The PI74LPT16374 is a 16-bit octal register designed with 16
D-type flip-flops with a buffered common clock and 3-state outputs.
The Output Enable (xOE) and clock (xCLK) controls are organized
to operate as two 8-bit registers or one 16-bit register. When OE is
HIGH, the outputs are in the high impedance state. Input data
meeting the setup and hold time requirements of the D inputs is
transferred to the O outputs on the LOW-to-HIGH transition of the
clock input.
The PI74LPT16374 can be driven from either 3.3V or 5.0V devices
allowing this device to be used as a translator in a mixed
3.3/5.0V system.
Logic Block Diagram
1
OE
1
CLK
1
O
0
C
D
1
D
0
TO 7 OTHER CHANNELS
2
OE
2
CLK
2
O
0
C
D
2
D
0
TO 7 OTHER CHANNELS
PI74LPT16374
3.3V 16-BIT REGISTER (3-STATE)
2
PS2070A 01/16/97
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Inputs
(1)
Outputs
(1)
Function
xDx
xCLK
xOE
xOx
High-Z
X
L
H
Z
X
H
H
Z
Load
L
L
L
Register
H
L
H
L
H
Z
H
H
Z
1
OE
1
1
O
0
2
1
O
1
3
GND
4
1
O
2
5
1
O
3
6
V
CC
7
1
O
4
8
1
O
5
9
GND
10
1
O
6
11
1
O
7
12
2
O
0
13
2
O
1
14
GND
15
2
O
2
16
2
O
3
17
V
CC
18
2
O
4
19
2
O
5
20
GND
21
2
O
6
22
2
O
7
23
2
OE
24
1
CLK
48
1
D
0
47
1
D
1
46
GND
45
1
D
2
44
1
D
3
43
V
CC
42
1
D
4
41
1
D
5
40
GND
39
1
D
6
38
1
D
7
37
2
D
0
36
2
D
1
35
GND
34
2
D
2
33
2
D
3
32
V
CC
31
2
D
4
30
2
D
5
29
GND
28
2
D
6
27
2
D
7
26
2
CLK
25
Product Pin Description
Pin Name
Description
xOE
3-State Output Enable Inputs (Active LOW)
xCLK
Clock Inputs
xDx
Data Inputs
xOx
3-State Outputs
GND
Ground
V
CC
Power
Truth Table
48-PIN
V48
A48
Product Pin Configuration
Note:
1. H = High Voltage Level, X = Don't Care,
L = Low Voltage Level, Z = High Impedance
Note:
1. This parameter is determined by device characterization but is not production tested.
Capacitance
(T
A
= 25C, f = 1 MHz)
Parameters
(1)
Description
Test Conditions
Typ.
Max.
Units
C
IN
Input Capacitance
V
IN
= 0V
4.5
6
pF
C
OUT
Output Capacitance
V
OUT
= 0V
5.5
8
pF
PI74LPT16374
3.3V 16-BIT REGISTER (3-STATE)
3
PS2070A 01/16/97
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DC Electrical Characteristics
(Over the Operating Range, T
A
= 40C to +85C, V
CC
= 2.7V to 3.6V)
Parameters
Description
Test Conditions
(1)
Min.
Typ
(2)
Max.
Units
V
IH
Input HIGH Voltage (Input pins)
Guaranteed Logic HIGH Level
2.2
--
5.5
V
Input HIGH Voltage (I/O pins)
2.0
--
5.5
V
V
IL
Input LOW Voltage
Guaranteed Logic LOW Level
0.5
--
0.8
V
(Input and I/O pins)
I
IH
Input HIGH Current (Input pins)
V
CC
= Max.
V
IN
= 5.5V
--
--
1
A
Input HIGH Current (I/O pins)
V
CC
= Max.
V
IN
= V
CC
--
--
1
A
I
IL
Input LOW Current (Input pins)
V
CC
= Max.
V
IN
= GND
--
--
1
A
Input LOW Current (I/O pins)
V
CC
= Max.
V
IN
= GND
--
--
1
A
I
OZH
High Impedance Output Current
V
CC
= Max.
V
OUT
= 5.5V
--
--
1
A
I
OZL
(3-State Output pins)
V
CC
= Max.
V
OUT
= GND
--
--
1
A
V
IK
Clamp Diode Voltage
V
CC
= Min., I
IN
= 18 mA
--
0.7
1.2
V
I
ODH
Output HIGH Current
V
CC
= 3.3V, V
IN
= V
IH
or V
IL
, V
O
= 1.5V
(3)
36
60
110
mA
I
ODL
Output LOW Current
V
CC
= 3.3V, V
IN
= V
IH
or V
IL
, V
O
= 1.5V
(3)
50
90
200
mA
V
OH
Output HIGH Voltage
V
CC
= Min.
I
OH
= 0.1 mA Vcc-0.2
--
--
V
V
IN
= V
IH
or V
IL
I
OH
= 3 mA
2.4
3.0
--
V
V
CC
= 3.0V,
I
OH
= 8 mA
2.4
(5)
3.0
--
V
V
IN
= V
IH
or V
IL
I
OH
= 24 mA
2.0
--
--
V
OL
Output LOW Voltage
V
CC
= Min.
I
OL
= 0.1 mA
--
--
0.2
V
V
IN
= V
IH
or V
IL
I
OL
= 16 mA
--
0.2
0.4
V
I
OL
= 24 mA
--
0.3
0.5
V
I
OS
Short Circuit Current
(4)
V
CC
= Max.
(3)
, V
OUT
= GND
60
85
240
mA
I
OFF
Power Down Disable
V
CC
= 0V, V
IN
or V
OUT
4.5V
--
--
100
A
V
H
Input Hysteresis
--
150
--
mV
Maximum Ratings
(Above which the useful life may be impaired. For user guidelines, not tested.)
Note:
Stresses greater than those listed under MAXI-
MUM RATINGS may cause permanent damage to
the device. This is a stress rating only and functional
operation of the device at these or any other condi-
tions above those indicated in the operational
sections of this specification is not implied. Expo-
sure to absolute maximum rating conditions for
extended periods may affect reliability.
Notes:
1. For Max. or Min. conditions, use appropriate value specified under Electrical Characteristics for the applicable device type.
2. Typical values are at Vcc = 3.3V, +25C ambient and maximum loading.
3. Not more than one output should be shorted at one time. Duration of the test should not exceed one second.
4. This parameter is guaranteed but not tested.
5. V
OH
= V
CC
0.6V at rated current.
Storage Temperature .............................................................. 55C to +125C
Ambient Temperature with Power Applied ............................. 40C to +85C
Supply Voltage to Ground Potential (Inputs & Vcc Only) ....... 0.5V to +7.0V
Supply Voltage to Ground Potential (Outputs & D/O Only) ... 0.5V to +7.0V
DC Input Voltage ..................................................................... 0.5V to +7.0V
DC Output Current ............................................................................... 120 mA
Power Dissipation ..................................................................................... 1.0W
PI74LPT16374
3.3V 16-BIT REGISTER (3-STATE)
4
PS2070A 01/16/97
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Power Supply Characteristics
Parameters Description
Test Conditions
(1)
Min.
Typ
(2)
Max.
Units
I
CC
Quiescent Power Supply Current
V
CC
= Max.
V
IN
= GND or V
CC
0.1
10
A
I
CC
Quiescent Power Supply Current
V
CC
= Max.
V
IN
= V
CC
0.6V
(3)
2.0
30
A
TTL Inputs HIGH
I
CCD
Dynamic Power Supply
(4)
V
CC
= Max.,
V
IN
= V
CC
50
75
A/
Outputs Open
V
IN
= GND
MHz
X
OE = GND
One Bit Toggling
50% Duty Cycle
I
C
Total Power Supply
V
CC
= Max.,
V
IN
= V
CC
0.6V
0.6
2.3
mA
Current
(6)
Outputs Open
V
IN
= GND
f
I
= 10 MH
Z
50% Duty Cycle
X
OE = GND
One Bit Toggling
V
CC
= Max.,
V
IN
= V
CC
0.6V
2.1
4.7
(5)
Outputs Open
V
IN
= GND
f
I
= 2.5 MH
Z
50% Duty Cycle
X
OE = GND
16 Bits Toggling
Notes:
1. For Max. or Min. conditions, use appropriate value specified under Electrical Characteristics for the applicable device.
2. Typical values are at Vcc = 3.3V, +25C ambient.
3. Per TTL driven input; all other inputs at Vcc or GND.
4. This parameter is not directly testable, but is derived for use in Total Power Supply Calculations.
5. Values for these conditions are examples of the Icc formula. These limits are guaranteed but not tested.
6. I
C
=I
QUIESCENT
+ I
INPUTS
+ I
DYNAMIC
I
C
= I
CC
+
I
CC
D
H
N
T
+ I
CCD
(f
CP
/2 + f
I
N
I
)
I
CC
= Quiescent Current (I
CCL
, I
CCH
and I
CCZ
)
I
CC
= Power Supply Current for a TTL High Input
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
CP
= Clock Frequency for Register Devices (Zero for Non-Register Devices)
N
CP
= Number of Clock Inputs at f
CP
f
I
= Input Frequency
N
I
= Number of Inputs at f
I
All currents are in milliamps and all frequencies are in megahertz.
PI74LPT16374
3.3V 16-BIT REGISTER (3-STATE)
5
PS2070A 01/16/97
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Switching Characteristics over Operating Range
(1)
LPT16374
LPT16374A
LPT16374C
Com.
Com.
Com.
Parameters
Description
Conditions
(2)
Min.
(3)
Max.
Min.
(3)
Max.
Min.
(3)
Max.
Units
t
PL
H
Propagation Delay
C
L
= 50 pF
2.0
7.0
2.0
6.5
2.0
5.2
ns
t
PHL
xCLK to xOx
R
L
= 500
t
PZH
Output Enable Time
1.5
7.2
1.5
6.5
1.5
5.5
ns
t
PZL
xOE to xOx
t
PHZ
Output Disable Time
(4)
1.5
7.2
1.5
5.5
1.5
5.0
ns
t
PLZ
xOE to xOx
t
SU
Setup Time HIGH
2.0
2.0
2.0
ns
or LOW, xDx to xCLK
t
H
Hold Time HIGH
1.5
1.5
1.5
ns
or LOW, xDx to xCLK
t
W
xCLK Pulse Width
(4)
7.0
5.0
5.0
ns
HIGH
t
SK
(o)
Output Skew
(5)
0.5
0.5
0.5
ns
Notes:
1. Propagation Delays and Enable/Disable times are with Vcc = 3.3V 0.3V, normal range. For Vcc = 2.7V, extended range, all
Propagation Delays and Enable/Disable times should be degraded by 20%.
2. See test circuit and waveforms.
3. Minimum limits are guaranteed but not tested on Propagation Delays.
4. This parameter is guaranteed but not production tested.
5. Skew between any two outputs, of the same package, switching in the same direction. This parameter is guaranteed by design.
Pericom Semiconductor Corporation
2380 Bering Drive San Jose, CA 95131 1-800-435-2336 Fax (408) 435-1100 http://www.pericom.com
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