21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI74FCT623T
Fast CMOS Octal Bus Transceiver (3-State)
Product Features
• PI74FCT623T is pin compatible with bipolar FAST™ Series at
a higher speed and lower power consumption
• TTL input and output levels
• Extremely low static power
• Hysteresis on all inputs
• Industrial operating temperature range: –40°C to +85°C
• Packages available:
– 20-pin 173 mil wide plastic TSSOP (L)
– 20-pin 300 mil wide plastic DIP (P)
– 20-pin 150 mil wide plastic QSOP (Q)
– 20-pin 150 mil wide plastic TQSOP (R)
– 20-pin 300 mil wide plastic SOIC (S)
Product Description
Pericom Semiconductor’s PI74FCT series of logic circuits are
produced in the Company’s advanced 0.6/0.8 micron CMOS
technology, achieving industry leading speed grades.
The PI74FCT623T is an 8-bit wide non-inverting octal transceiver
designed with 3-state bus-driving outputs in both the send and
receive directions. Designed for asynchronous two-way operation
between data buses, the control function allows for maximum
flexibility in timing.
Logic Block Diagram
G
BA
G
AB
Product Pin Configuration
GAB
A
0
A
1
A
2
A
3
A
4
A
5
A
6
A
7
GND
1
20
2
19
3
20-Pin
18
4
L, P,
17
5
Q, R,
16
6
15
S
7
14
8
13
9
12
10
11
Vcc
GBA
B
0
B
1
B
2
B
3
B
4
B
5
B
6
B
7
A
0
B
0
A
1
B
1
A
2
B
2
Product Pin Description
Pin Name
GBA, GAB
A
0
-A
7
B
0
-B
7
GND
V
CC
Description
Enable Outputs
A Bus Inputs or 3-State Outputs
B Bus Inputs or 3-State Outputs
Ground
Power
A
3
B
3
A
4
B
4
Truth Table
(1)
Inputs
GBA
L
H
H
L
1.
A
5
B
5
GAB
L
H
L
H
Outputs
B Data to A Bus
A Data to B Bus
Z
B Data to A Bus
A Data to B Bus
A
6
B
6
A
7
B
7
H = High Voltage Level
L = Low Voltage Level
Z = High Impedance (OFF) State
PS2021B
06/20/01
1
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI74FCT623T
Octal Bus Transceiver (3-State)
Maximum Ratings
(Above which the useful life may be impaired. For user guidelines, not tested.)
Storage Temperature ................................................................... –65°C to +150°C
Ambient Temperature with Power Applied .....................................-40°C to +85°C
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 ..........................................................................................0.5W
Note:
Stresses greater than those listed under
MAXIMUM 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 conditions above those
indicated in the operational sections of this
specification is not implied. Exposure to
absolute maximum rating conditions for
extended periods may affect reliability.
DC Electrical Characteristics
(Over the Operating Range, T
A
= –40°C to +85°C, V
CC
= 5V ± 5%)
Parameters Description
V
OH
V
OL
V
IH
V
IL
I
IH
I
IL
I
OZH
I
OZL
V
IK
I
OS
I
OFF
V
H
Output HIGH Voltage
Output LOW Current
Input HIGH Voltage
Input LOW Voltage
Input HIGH Current
Input LOW Current
High Impedance
Output Current
Clamp Diode Voltage
Short Circuit Current
Power Down Disable
Input Hysteresis
V
CC
= Min., I
IN
= –18 mA
V
CC
= Max.
(3)
, V
OUT
= GND
V
CC
= GND, V
OUT
= 4.5V
–60
—
Test Conditions
(1)
V
CC
= Min., V
IN
= V
IH
or V
IL
V
CC
= Min., V
IN
= V
IH
or V
IL
Guaranteed Logic HIGH Level
Guaranteed Logic LOW Level
V
CC
= Max.
V
CC
= Max.
V
CC
= Max.
V
IN
= V
CC
V
IN
= GND
V
OUT
= 2.7V
V
OUT
= 0.5V
–0.7
–120
—
200
100
I
OH
= –15.0 mA
I
OL
= 64 mA
2.0
0.8
1
–1
1
–1
–1.2
Min.
2.4
Typ
(2)
3.0
0.3
0.55
Max.
Units
V
V
V
V
µA
µA
µA
µA
V
mA
µA
m
V
Capacitance
(T
A
= 25°C, f = 1 MHz)
Parameters
(4)
C
IN
C
OUT
Description
Input Capacitance
Output Capacitance
Test Conditions
V
IN
= 0V
V
OUT
= 0V
Typ
6
8
Max.
10
12
Units
pF
pF
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 = 5.0V, +25°C 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 determined by device characterization but is not production tested.
2
PS2021B
06/20/01
Switching Characteristics over Operating Range
623T
Com.
623AT
Com.
Max
Min
Max
Min
623CT
Com.
Max
Units
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21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI74FCT623T
Octal Bus Transceiver (3-State)
Power Supply Characteristics
Parameters Description
I
CC
∆I
CC
I
CCD
Quiescent Power
Supply Current
Supply Current per
Input @ TTL HIGH
Supply Current per
Input per MHz
(4)
Total Power Supply
Current
(6)
V
CC
= Max.
V
CC
= Max.,
V
CC
= Max., Outputs Open
GBA = GAB = GND,
One Input Toggling, 50% Duty Cycle
V
CC
= Max., Outputs Open
f
CP
= 10 MH
Z
, 50% Duty Cycle
GBA = GAB = GND, 50% Duty Cycle
One Bit toggling at f
I
= 5 MH
Z
V
CC
= Max., Outputs Open
f
CP
= 10 MH
Z
, 50% Duty Cycle
GBA = GAB = GND, 50% Duty Cycle
Eight Bits toggling at f
I
= 2.5 MH
Z
50% Duty Cycle
Test Conditions
(1)
V
IN
= GND
or Vcc
V
IN
= 3.4V
(3)
V
IN
= V
CC
V
IN
= GND
V
IN
= V
CC
V
IN
= GND
V
IN
= 3.4V
V
IN
= GND
V
IN
= V
CC
V
IN
= GND
V
IN
= 3.4V
V
IN
= GND
Min.
Typ
(2)
0.1
0.5
0.15
Max.
500
2.0
0.25
Units
µA
mA
mA/
MHz
mA
I
C
1.5
1.8
3.0
3.5
(5)
4.5
(5)
6.0
(5)
5.0
14.0
(5)
Notes:
1. For conditions shown as Max. or Min., use appropriate value specified under Electrical Characteristics for the applicable device.
2. Typical values are at Vcc = 5.0V, +25°C ambient.
3. Per TTL driven input (V
IN
= 3.4V); 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
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
CP
= Clock Frequency for Register Devices (Zero for Non-Register Devices)
f
I
= Input Frequency
N
I
= Number of Inputs at f
I
All currents are in milliamps and all frequencies are in megahertz.
Parameters
t
PLH
t
PHL
t
PLH
t
PHL
t
PZH
t
PZL
t
PZH
t
PZL
t
PZH
t
PZL
t
PZH
Description
Propagation Delay
A
N
to B
N
Propagation Delay
B
N
to A
N
Output Enable Time
GBA to A
N
Output Disable Time
(3)
GBA to A
N
Output Enable Time
GAB to B
N
Output Disable Time
(3)
Conditions
(1)
C
L
= 50 pF
R
L
= 500Ω
Min
1.5
1.5
1.5
1.5
1.5
1.5
7.5
7.5
9.0
8.0
9.0
8.0
1.5
1.5
1.5
1.5
1.5
1.5
5.5
5.5
7.0
6.5
7.0
6.5
1.5
1.5
1.5
1.5
1.5
1.5
4.8
4.8
6.1
5.6
6.1
5.6
ns
ns
ns
ns
ns
ns
t
PZL
GAB to B
N
Notes:
1. See test circuit and wave forms.
2 Minimum limits are guaranteed but not tested on Propagation Delays.
3. This parameter is guaranteed but not production tested.
3
PS2021B
06/20/01
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