N74F219AD 查看數據表（PDF） - Philips Electronics
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N74F219AD Datasheet PDF : 12 Pages
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Philips Semiconductors
64-bit TTL bipolar RAM, non-inverting (3-State)
Product specification
74F219A
LOGIC SYMBOL
4 6 10 12
D0 D1 D2 D3
1
A0
15
A1
14
A2
13
A3
2
CE
3
WE
Q0 Q1 Q2 Q3
VCC = pin 16
GND = pin 8
LOGIC DIAGRAM
5 7 9 11
SF00308
1
A0
15
A1
14
A2
13
A3
Decoder
Drivers
Address
Decoder
IEC/IEEE SYMBOL
RAM 16X4
1
15
0
14
A
0
15
13
1
2
G1
3
1 EN [READ]
1 C2 [WRITE]
4
A,2D A
5
6
7
10
9
12
11
D0 D1 D2 D3
4 6 10 12
Data buffers
16–word x 4–bit
memory cell
array
3
2 WE
CE
VCC = Pin 16
GND = Pin 8
FUNCTION TABLE
INPUTS
OUTPUT
CE WE Dn
LHX
Qn
Stored data
LLL
High impedance
L LH
High impedance
HXX
NOTES:
H = High voltage level
L = Low voltage level
X = Don’t care
High impedance
Output buffers
5 7 9 11
Q0 Q1 Q2 Q3
OPERATING
MODE
Read
Write “0”
Write “1”
Disable input
SF00309
SF00301
1996 Jan 05
3
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