CMOS PARALLEL FIFO
64 x 4
FEATURES:
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IDT72401
IDT72403
OBSOLETE PARTS
has an Output Enable (OE) pin. The FlFOs accept 4-bit data at the data input
(D0-D3). The stored data stack up on a first-in/first-out basis.
A Shift Out (SO) signal causes the data at the next to last word to be shifted
to the output while all other data shifts down one location in the stack. The Input
Ready (IR) signal acts like a flag to indicate when the input is ready for new
data (IR = HIGH) or to signal when the FIFO is full (IR = LOW). The IR signal
can also be used to cascade multiple devices together. The Output Ready (OR)
signal is a flag to indicate that the output remains valid data (OR = HIGH) or
to indicate that the FIFO is empty (OR = LOW). The OR can also be used to
cascade multiple devices together.
Width expansion is accomplished by logically ANDing the IR and OR signals
to form composite signals.
Depth expansion is accomplished by tying the data inputs of one device to
the data outputs of the previous device. The IR pin of the receiving device is
connected to the SO pin of the sending device and the OR pin of the sending
device is connected to the Shift In (SI) pin of the receiving device.
Reading and writing operations are completely asynchronous allowing the
FIFO to be used as a buffer between two digital machines of widely varying
operating frequencies. The 45MHz speed makes these FlFOs ideal for highspeed communication and controller applications.
Military grade product is manufactured in compliance with the of MIL-STD883, Class B.
First-ln/First-Out Dual-Port memory
64 x 4 organization (IDT72401/72403)
RAM-based FIFO with low falI-through time
Low-power consumption
— Active: 175mW (typ.)
Maximum shift rate — 45MHz
High data output drive capability
Asynchronous and simultaneous read and write
Fully expandable by bit width
Fully expandable by word depth
IDT72403 have Output Enable pin to enable output data
High-speed data communications applications
High-performance CMOS technology
Available in CERDIP, plastic DIP and SOIC
Military product compliant to MlL-STD-883, Class B
Standard Military Drawing #5962-86846 and
5962-89523 is listed on this function.
Green parts available, see ordering information
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R EW
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DESCRIPTION:
The IDT72401 and IDT72403 are asynchronous high-performance
First-ln/First-Out memories organized 64 words by 4 bits. The IDT72403 also
FUNCTIONAL BLOCK DIAGRAM
SI
IR
INPUT
CONTROL
LOGIC
D0-3
DATA IN
MR
MASTER
RESET
WRITE POINTER
WRITE MULTIPLEXER
OUTPUT
ENABLE
OE
(IDT72403 only)
MEMORY
ARRAY
DATA IN
Q0-3
READ MULTIPLEXER
READ POINTER
MASTER
RESET
SO
OR
2747 drw01
IDT and the IDT logo are registered trademarks of Integrated Device Technology, Inc.
FAST is a trademark of National Semiconductor, Inc.
MILITARY AND COMMERCIAL TEMPERATURE RANGES
JUNE 2012
1
DSC-2747/13
IDT72401/72403
CMOS PARALLEL FIFO 64 x 4, 64 x 5
MILITARY AND COMMERCIAL
TEMPERATURE RANGES
PIN CONFIGURATIONS
IDT72401/IDT72403
NC/OE(1)
IR
SI
D0
D1
D2
D3
GND
1
16
2
15
3
14
4
13
5
12
6
11
7
10
9
8
Vcc
SO
OR
Q0
Q1
Q2
Q3
MR
2747 drw 02
PLASTIC DIP (P16-1, ORDER CODE: P)
CERDIP (D16-1, ORDER CODE: D)
SOIC (SO16-1, ORDER CODE: SO)
TOP VIEW
NOTE:
1. Pin 1: NC - No Connection IDT72401, OE - IDT72403
RECOMMENDED OPERATING
CONDITIONS
ABSOLUTE MAXIMUM RATINGS(1)
Symbol
Parameter
Min.
Typ.
Max.
Unit
4.5
5.0
5.5
V
Symbol
Rating
Commercial
Military
Unit
VCC
VTERM
Terminal Voltage with
Respect to GND
Storage Temp.
DC Output Current
–0.5 to +7.0
–0.5 to +7.0
V
GND
Supply Voltage
0
0
0
V
VIH
Input High Voltage
2.0
—
—
V
VIL(1)
Input High Voltage
—
—
0.8
V
TA
TA
Operating Temperature Commercial
Operating Temperature Military
0
–55
—
—
70
125
°C
°C
TSTG
IOUT
–55 to +125
–50 to +50
–65 to +150
–50 to +50
°C
mA
NOTE:
1. Stresses greater than those listed under ABSOLUTE 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.
Supply Voltage Commercial/Military
NOTE:
1. 1.5V undershoots are allowed for 10ns once per cycle.
DC ELECTRICAL CHARACTERISTICS
(Commercial: VCC = 5.0V ± 10%, TA = 0°C to +70°C; Military: VCC = 5.0V ± 10%, TA = –55°C to +125°C)
IDT72401
IDT72403
Commercial
fIN = 45, 35, 25, 15, 10 MHz
Symbol
IIL
IIH
VOL
VOH
IOS(1)
IHZ(2)
ILZ(2)
ICC(3,4)
Parameter
Low-Level Input Current
High-Level Input Current
Low-Level Output Voltage
High-Level Output Voltage
Output Short-Circuit Current
HIGH Impedance Output Current
LOW Impedance Output Current
Active Supply Current
Test Conditions
VCC = Max., GND ≤ VI ≤ VCC
VCC= Max., GND ≤ VI ≤ VCC
VCC= Min., IOL = 8mA
VCC= Min., IOH = –4mA
VCC= Max., VO = GND
VCC= Max., VO = 2.4V
VCC= Max., VO = 0.4V
VCC= Max., f = 10MHz
Min.
–10
—
—
2.4
–20
—
–20
—
Max.
—
10
0.4
—
–110
20
—
35
IDT72401
IDT72403(5)
Military
fIN = 35, 25, 15, 10 MHz
Min.
–10
—
—
2.4
–20
—
–20
—
NOTES:
1. Not more than one output should be shorted at a time and duration of the short-circuit should not exceed one second. Guaranteed but not tested.
2. IDT72403 only.
3. Tested with outputs open (IOUT = 0). OE is HIGH for IDT72403.
4. For frequencies greater than 10MHz, ICC = 35mA + (1.5mA x [f –10MHz]) commercial, and ICC = 45mA + (1.5mA x [f –10MHz]) military.
5. Military availability for IDT72403 is 10MHz, 35MHz. IDT72401 is available for all MHz.
2
Max.
—
10
0.4
—
–110
20
—
45
Unit
µA
µA
V
V
mA
µA
µA
mA
IDT72401/72403
CMOS PARALLEL FIFO 64 x 4, 64 x 5
MILITARY AND COMMERCIAL
TEMPERATURE RANGES
OPERATING CONDITIONS
(Commercial: VCC = 5.0V ± 10%, TA = 0°C to +70°C; Military: VCC = 5.0V ± 10%, TA = –55°C to +125°C)
Symbol
t SIH (1)
tSIL
tIDS
tIDH
t SOH (1)
t SOL
tMRW
tMRS
tSIR
tHIR
t SOR (4)
Parameter
Shift in HIGH Time
Shift in LOW TIme
Input Data Set-up
Input Data Hold Time
Shift Out HIGH Time
Shift Out LOW Time
Master Reset Pulse
Master Reset Pulse to SI
Data Set-up to IR
Data Hold from IR
Data Set-up to OR HIGH
Figure
2
2
2
2
5
5
8
8
4
4
7
Commercial
IDT72401L45
IDT72403L45
Min.
Max.
9
—
11
—
0
—
13
—
9
—
11
—
20
—
10
—
3
—
13
—
0
—
IDT72401L35
IDT72403L35
Min.
Max.
9
—
17
—
0
—
15
—
9
—
17
—
25
—
10
—
3
—
15
—
0
—
Commercial and Military(5)
IDT72401L25
IDT72401L15
IDT72403L25
IDT72403L15
Min.
Max.
Min.
Max.
11
—
11
—
24
—
25
—
0
—
0
—
20
—
30
—
11
—
11
—
24
—
25
—
25
—
25
—
10
—
25
—
5
—
5
—
20
—
30
—
0
—
0
—
IDT72401L10
IDT72403L10
Min.
Max.
11
—
30
—
0
—
40
—
11
—
25
—
30
—
35
—
5
—
30
—
0
—
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
IDT72401L10
IDT72403L10
Min.
Max.
Unit
AC ELECTRICAL CHARACTERISTICS
(Commercial: VCC = 5.0V ± 10%, TA = 0°C to +70°C; Military: VCC = 5.0V ± 10%, TA = –55°C to +125°C)
Symbol
fIN
t IRL
(1)
t IRH
(1)
f OUT
t ORL
Parameter
Figure
Commercial
IDT72401L45
IDT72403L45
Min.
Max.
IDT72401L35
IDT72403L35
Min.
Max.
Commercial and Military(5)
IDT72401L25
IDT72401L15
IDT72403L25
IDT72403L15
Min.
Max.
Min.
Max.
Shift In Rate
2
—
45
—
35
—
25
—
15
—
10
MHz
Shift In to Input Ready LOW
2
—
18
—
18
—
21
—
35
—
40
ns
Shift In to Input Ready HIGH
2
—
18
—
20
—
28
—
40
—
45
ns
Shift Out Rate
5
—
45
—
35
—
25
—
15
—
10
MHz
Shift Out to Output Ready LOW
5
—
18
—
18
—
19
—
35
—
40
ns
t ORH (1)
Shift Out to Output Ready HIGH
5
—
19
—
20
—
34
—
40
—
55
ns
tODH
Output Data Hold (Previous Word)
5
5
—
5
—
5
—
5
—
5
—
ns
tODS
Output Data Shift (Next Word)
5
—
19
—
20
—
34
—
40
—
55
ns
t PT
Data Throughput or "Fall-Through"
4, 7
—
30
—
34
—
40
—
65
—
65
ns
tMRORL
Master Reset to OR LOW
8
—
25
—
28
—
35
—
35
—
40
ns
tMRIRH
Master Reset to IR HIGH
8
—
25
—
28
—
35
—
35
—
40
ns
tMRQ
Master Reset to Data Output LOW
8
—
20
—
20
—
25
—
35
—
40
ns
Output Valid from OE LOW
9
—
12
—
15
—
20
—
30
—
35
ns
Output High-Z from OE HIGH
9
—
12
—
12
—
15
—
25
—
30
ns
t IPH (2,4)
Input Ready Pulse HIGH
4
9
—
9
—
11
—
11
—
11
—
ns
t OPH (2,4)
Output Ready Pulse HIGH
7
9
—
9
—
11
—
11
—
11
—
ns
(1)
t OOE
(3)
t HZOE
(3,4)
NOTES:
1. Since the FIFO is a very high-speed device, care must be excercised in the design of the hardware and timing utilized within the design. Device grounding and decoupling
are crucial to correct operation as the FIFO will respond to very small glitches due to long reflective lines, high capacitances and/or poor supply decoupling and grounding.
A monolithic ceramic capacitor of 0.1µF directly between VCC and GND with very short lead length is recommended.
2. This parameter applies to FIFOs communicating with each other in a cascaded mode. IDT FIFOs are guaranteed to cascade with other IDT FIFOs of like speed grades.
3. IDT72403 only.
4. Guaranteed by design but not currently tested.
5. Military availability for IDT72403 is 10MHz, 35MHz. IDT72401 is available for all MHz.
3
IDT72401/72403
CMOS PARALLEL FIFO 64 x 4, 64 x 5
MILITARY AND COMMERCIAL
TEMPERATURE RANGES
ALL INPUT PULSES:
AC TEST CONDITIONS
Input Pulse Levels
GND to 3.0V
Input Rise/Fall Times
3ns
Input Timing Reference Levels
1.5V
Output Reference Levels
1.5V
Output Load
3.0V
90%
90%
10%
GND
10%
72401only
Commercial and Military
L
Low Power
72401
72403
64 x 4 FIFO
64 x 4 FIFO
Shift Frequency (fs)
Speed in MHz
2747 drw 16
NOTES:
1. Industrial temperature range is available by special order.
2. Green parts are available, for specific speeds and packages contact your sales office.
3. For “P”, Plastic Dip, when ordering green package, the suffix is “PDG”.
DATASHEET DOCUMENT HISTORY
07/10/2003
10/27/2005
04/25/2008
02/11/2009
06/29/2012
09/05/2014
08/22/2019
pgs. 2, 3, and 9.
pgs. 1- 9.
pgs. 1- 9.
pg. 9.
pgs. 1 and 9.
PDN# CQ-14-06R1 issued. See IDT.com for PDN specifics.
Datasheet changed to Obsolete Status.
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9
for Tech Support:
408-360-1753
email: FIFOhelp@idt.com
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