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參數(shù)資料
| 型號(hào)： | 74F219A |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | 64-bit TTL bipolar RAM, non-inverting(3-State)(64位TTL雙極性RAM，同向（三態(tài)）) |
| 中文描述： | 64位TTL雙極內(nèi)存，非反相（3態(tài)）（64位的TTL雙極性內(nèi)存，同向（三態(tài)）） |
| 文件頁(yè)數(shù)： | 7/12頁(yè) |
| 文件大?。?/td> | 91K |
| 代理商： | 74F219A |
Philips Semiconductors
Product specification
74F219A
64-bit TTL bipolar RAM, non-inverting (3-State)
1996 Jan 05
7
AC WAVEFORMS FOR WRITE CYCLE
V
M
V
M
An
t
su
(H or L)
t
PZH
V
M
Qn
t
PHZ
t
PLZ
V
M
V
M
Dn
V
M
CE
V
M
V
M
V
M
WE
t
h
(H or L)
V
M
t
h
(H or L)
t
su
( L)
t
su
(H or L)
t
h
( L)
t
w
( L)
V
M
Hi–Z
t
PZL
NOTE:
For all waveforms, V
M
= 1.5V.
SP000313
Waveform 4.
Write cycle
TEST CIRCUIT AND WAVEFORM
t
w
90%
V
M
10%
90%
V
M
10%
90%
V
M
10%
90%
V
M
10%
NEGATIVE
PULSE
POSITIVE
PULSE
t
w
AMP (V)
0V
0V
t
THL (
t
f
)
INPUT PULSE REQUIREMENTS
rep. rate
t
w
t
TLH
2.5ns
t
THL
2.5ns
1MHz
500ns
Input Pulse Definition
V
CC
family
74F
D.U.T.
PULSE
GENERATOR
R
L
C
L
R
T
V
IN
V
OUT
Test Circuit for Totem-Pole Outputs
DEFINITIONS:
R
L
=
Load resistor;
see AC ELECTRICAL CHARACTERISTICS for value.
Load capacitance includes jig and probe capacitance;
see AC ELECTRICAL CHARACTERISTICS for value.
Termination resistance should be equal to Z
OUT
of
pulse generators.
C
L
=
R
T
=
t
THL (
t
f
)
t
TLH (
t
r
)
t
TLH (
t
r
)
AMP (V)
amplitude
3.0V
1.5V
V
M
SF00006
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