UPD7759C NEC [NEC], UPD7759C Datasheet - Page 8

• Manufacturer Part Number: UPD7759C
• Description: ADPCM SPEECH SYNTHESIZER LSIs
• Manufacturer: NEC [NEC]

8
AC CHARACTERISTICS (Ta = –10 to +70 C, V
TIMING REQUIREMENTS (common to all modes)
2.1 STAND ALONE MODE
(1)
BUSY rise time
BUSY fall time
BUSY output stop time
RESET pulse width
CS set up time
CS hold time
ST set up time
ST pulse width
Message select code set up time
Message select code hold time
Speech data set up time
Speech data hold time
TIMING REQUIREMENTS
Parameters
Parameters
Symbol
Symbol
t
t
t
t
t
t
t
t
t
t
t
t
RDH
t
t
RST
DW
WD
RB
CS
SC
RS
CC
DR
r1
r2
f1
f2
C
C
C
C
from RESET
for ST
from ST
In operation mode, from RESET
In standby mode, from RESET
2.7 V
4.5 V
2.7 V
4.5 V
from ST
for DRQ
from DRQ
L
L
L
L
= 150 pF, V
= 150 pF, V
= 150 pF, V
= 150 pF, V
<
=
< =
<
=
< =
DD
V
V
V
V
DD
DD
DD
DD
= 2.7 to 5.5 V, f
Conditions
Conditions
<
=
< =
<
=
< =
DD
DD
DD
DD
5.5 V
5.5 V
5.5 V, from ST
5.5 V, from ST
= 5 V
= 2.7 to 5.5 V
= 5 V
= 2.7 to 5.5 V
10 %
10 %
OSC
= 640 kHz)
MIN.
MIN.
18.5
200
350
350
1.6
0
0
2
5
0
2
TYP.
TYP.
MAX.
MAX.
1.25
800
800
9.5
7.5
2
2
Unit
Unit
ms
PD7759
ns
ns
ns
ns
ns
ns
ns
s
s
s
s
s
s
s
s
s