ZEN2044F Zenic, ZEN2044F Datasheet - Page 21

• Manufacturer Part Number: ZEN2044F
• Description: 33MHz Up/down Counter
• Manufacturer: Zenic

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7-4. AC chracteristics
C/D,AD/CE setup time(to D7-D0)
C/D,AD/CE hold time(to D7-D0)
Data setup time(to WR)
Data hold time(to WR)
WR pulse width
WR recovery time[1]
C/D,AD/CE setup time(to RD)
C/D,AD/CE hold time(to RD)
RD pulse width
Data access time(from RD)
Data float time(from RD)
RD recovery time[1]
Clock high/low pulse width
Clock cycle time
Reset pulse width
Reset recovery time
LD pulse width
LT pulse width
EXTB
EXTB
EXTA , EXTB
A/UP , B/DN cycle time[4]
A/UP , B/DN high/low level time[4]
A/UP , B/DN phase difference time[4]
Z/CLR high level width[5]
Z/CLR pulse width[6]
A/UP setup time(to B/DN )[7]
A/UP high/low level time[7]
A/UP cycle time[7]
A/UP , B/DN cycle time[8]
A/UP , B/DN high/low level time[8]
n
n
Note )
n
n
n
n
n
n
n
n
[1] Required interval clock cycles to access the
[2] At executing Mode 1 select command
[3] At executing Mode 0 select command
[4] Two phase-shfted pulse mode
[5] Synchronous clear mode
[6] Asynchronous clear mode
[7] Single pulse mode
[8] Up/down pulse mode
n
n
n
n
n
set time(from CLK)[2]
float time(from CLK)[3]
n
n
n
n
n
n
n
n
n
n
fix time(from CLK)
Parameter
n
- 21 -
ZEN2044F
Symbol
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
PWAB
CYAB
UDCY
RSRC
WRC
LDW
RRC
LTW
AHL
WW
RST
SEB
FEB
EXF
SAB
ACY
AW
WA
DW
WD
AR
RA
RR
RD
DF
CY
CP
SZ
ZZ
SS
U
T *4+32
T *2+16
T *2+16
T *2+16
CY
CY
CY
T *5
T *5
T *2
T *5
T +8
T +8
T +8
T +8
T +8
T +8
CY
Min
CY
CY
CY
CY
CY
CY
30
25
CY
25
CY
15
30
CY
CY
25
25
0
0
3
0
5
4
(
Z2044G00 ZENIC INC.
Max
20
15
15
15
ZEN2044F
)
Unit
nS
nS
nS
nS
nS
nS
nS
nS
nS
nS
nS
nS
nS
nS
nS
nS
nS
nS
nS
nS
nS
nS
nS
nS
nS
nS
nS
nS
nS
nS
nS