74F189 64-Bit Random Access Memory with 3-STATE Outputs
April 1988
Revised June 2002
74F189
64-Bit Random Access Memory with 3-STATE Outputs
General Description
The F189 is a high-speed 64-bit RAM organized as a 16-
word by 4-bit array. Address inputs are buffered to mini-
mize loading and are fully decoded on-chip. The outputs
are 3-STATE and are in the high impedance state when-
ever the Chip Select (CS) input is HIGH. The outputs are
active only in the Read mode and the output data is the
complement of the stored data.
Features
s
3-STATE outputs for data bus applications
s
Buffered inputs minimize loading
s
Address decoding on-chip
s
Diode clamped inputs minimize ringing
Ordering Code:
Order Number
74F189SC
74F189SJ
74F189PC
(Note 1)
Package Number
M16B
M16D
N16E
Package Description
16-Lead Small Outline Intergrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide
16-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300" Wide
Devices also available in Tape and Reel. Specify by appending suffix “X” to the ordering code.
Note 1:
This device not available in Tape and Reel.
Logic Symbols
Connection Diagram
IEEE/IEC
© 2002 Fairchild Semiconductor Corporation
DS009493
www.fairchildsemi.com
74F189
Unit Loading/Fan Out
U.L.
Pin Names
A
0
–A
3
CS
WE
D
0
–D
3
O
0
–O
3
Description
HIGH/LOW
Address Inputs
Chip Select Input (Active LOW)
Write Enable Input (Active LOW)
Data Inputs
Inverted Data Outputs
1.0/1.0
1.0/1.0
1.0/1.0
1.0/1.0
Input I
IH
/I
IL
Output I
OH
/I
OL
20
µ
A/
−
0.6 mA
20
µ
A/
−
1.2 mA
20
µ
A/
−
0.6 mA
20
µ
A/
−
0.6 mA
150/40 (33.3)
−
3.0 mA/24 mA (20 mA)
Function Table
Inputs
Operation
CS
L
L
H
H
=
HIGH Voltage Level
L
=
LOW Voltage Level
X
=
Immaterial
Condition of Outputs
High Impedance
Complement of Stored Data
High Impedance
WE
L
H
X
Write
Read
Inhibit
Block Diagram
www.fairchildsemi.com
2
74F189
Absolute Maximum Ratings
(Note 2)
Storage Temperature
Ambient Temperature under Bias
Junction Temperature under Bias
V
CC
Pin Potential to
Ground Pin
Input Voltage (Note 2)
Input Current (Note 2)
Voltage Applied to Output
in HIGH State (with V
CC
=
0V)
Standard Output
3-STATE Output
Current Applied to Output
in LOW State (Max)
−
65
°
C to
+
150
°
C
−
55
°
C to
+
125
°
C
−
55
°
C to
+
175
°
C
−
0.5V to
+
7.0V
−
0.5V to
+
7.0V
−
30 mA to
+
5.0 mA
Recommended Operating
Conditions
Free Air Ambient Temperature
Supply Voltage
0
°
C to
+
70
°
C
+
4.5V to
+
5.5V
−
0.5V to V
CC
−
0.5V to
+
5.5V
Note 2:
Absolute maximum ratings are values beyond which the device
may be damaged or have its useful life impaired. Functional operation
under these conditions is not implied.
Note 3:
Either voltage limit or current limit is sufficient to protect inputs.
DC Electrical Characteristics
Symbol
V
IH
V
IL
V
CD
V
OH
Parameter
Input HIGH Voltage
Input LOW Voltage
Input Clamp Diode Voltage
Output HIGH
Voltage
10% V
CC
10% V
CC
5% V
CC
5% V
CC
V
OL
I
IH
Output LOW Voltage
Input HIGH
5.0
Current
I
BVI
Input HIGH Current
7.0
Breakdown Test
I
CEX
Output HIGH
50
Leakage Current
V
ID
Input Leakage
4.75
Test
I
OD
Output Leakage
3.75
Circuit Current
I
IL
Input LOW Current
−0.6
−1.2
I
OZH
I
OZL
I
OS
I
ZZ
I
CCZ
Output Leakage Current
Output Leakage Current
Output Short-Circuit Current
Bus Drainage Test
Power Supply Current
37
−60
50
−50
−150
500
55
µA
0.0
V
0.0
10% V
CC
2.5
2.4
V
2.7
2.7
0.5
V
µA
Min
Max
Min
Min
2.0
0.8
−1.2
Typ
Max
Units
V
V
V
Min
V
CC
Conditions
Recognized as a HIGH Signal
Recognized as a LOW Signal
I
IN
= −18
mA
I
OH
= −1
mA
I
OH
= −3
mA
I
OH
= −1
mA
I
OH
= −3
mA
I
OL
=
24 mA
V
IN
= 2.7V
µA
Max
V
IN
=
7.0V
µA
Max
V
OUT
=
V
CC
I
ID
=
1.9
µA
All Other Pins Grounded
V
IOD
=
150 mV
All Other Pins Grounded
mA
µA
µA
mA
µA
mA
Max
Max
Max
Max
0.0V
Max
V
IN
=
0.5V (except CS)
V
IN
=
0.5V (CS)
V
OUT
=
2.7V
V
OUT
=
0.5V
V
OUT
=
0V
V
OUT
=
5.25V
V
O
=
HIGH Z
3
www.fairchildsemi.com
74F189
AC Electrical Characteristics
T
A
= +25°C
Symbol
Parameter
Min
t
PLH
t
PHL
t
PZH
t
PZL
t
PHZ
t
PLZ
t
PZH
t
PZL
t
PHZ
t
PLZ
Access Time, HIGH or LOW
A
n
to O
n
Access Time, HIGH or LOW
CS to O
n
Disable Time, HIGH or LOW
CS to O
n
Write Recovery Time,
HIGH or LOW WE to O
n
Disable Time, HIGH or LOW
WE to O
n
10.0
8.0
3.5
5.0
2.0
3.0
6.5
6.5
4.0
5.0
V
CC
= +5.0V
C
L
=
50 pF
Typ
18.5
13.5
6.0
9.0
4.0
5.5
15.0
11.0
7.0
9.0
Max
26.0
19.0
8.5
13.0
6.0
8.0
28.0
15.5
10.0
13.0
T
A
= −55°C
to
+125°C
V
CC
= +5.0V
C
L
=
50 pF
Min
9.0
8.0
3.5
5.0
2.0
2.5
6.5
6.5
3.5
5.0
Max
32.0
23.0
10.5
15.0
8.0
10.0
37.5
17.5
12.0
15.0
T
A
=
0°C to
+70°C
V
CC
= +5.0V
C
L
=
50 pF
Min
10.0
8.0
3.5
5.0
2.0
3.0
6.5
6.5
4.0
5.0
Max
27.0
ns
20.0
9.5
ns
14.0
7.0
ns
9.0
29.0
ns
16.5
11.0
ns
14.0
Units
AC Operating Requirements
T
A
= +25°C
Symbol
Parameter
V
CC
= +5.0V
Min
t
S
(H)
t
S
(L)
t
H
(H)
t
H
(L)
t
S
(H)
t
S
(L)
t
H
(H)
t
H
(L)
t
S
(L)
Setup Time, HIGH or LOW
A
n
to WE
Hold Time, HIGH or LOW
A
n
to WE
Setup Time, HIGH or LOW
D
n
to WE
Hold Time, HIGH or LOW
D
n
to WE
Setup Time, LOW
CS to WE
ns
t
H
(L)
Hold Time, LOW
CS to WE
t
W
(L)
WE Pulse Width, LOW
6.0
15.0
6.0
ns
6.0
7.5
6.0
0
0
2.0
2.0
10.0
10.0
0
0
0
Max
T
A
= −55°C
to
+125°C
V
CC
= +5.0V
Min
0
0
2.0
2.0
11.0
11.0
2.0
2.0
0
Max
T
A
=
0°C to
+70°C
V
CC
= +5.0V
Min
0
0
ns
2.0
2.0
10.0
10.0
ns
0
0
0
Max
Units
www.fairchildsemi.com
4
74F189
Physical Dimensions
inches (millimeters) unless otherwise noted
16-Lead Small Outline Intergrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide
Package Number M16B
5
www.fairchildsemi.com
嵌入式系统
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
