ds21ft40 Maxim Integrated Products, Inc., ds21ft40 Datasheet - Page 79

• Manufacturer Part Number: ds21ft40
• Description: Ds21ft40 Four X Three 12 Channel E1 Framer
• Manufacturer: Maxim Integrated Products, Inc.

AC CHARACTERISTICS – TRANSMIT SIDE
PARAMETER
TCLK Period
TCLK Pulse Width
TCLKI Pulse Width
TSYSCLK Period
TSYSCLK Pulse Width
TSYNC or TSSYNC Set
Up to TCLK or TSYSCLK
falling
TSYNC or TSSYNC Pulse
Width
TSER Set Up to TCLK,
TSYSCLK Falling
TSER Hold from TCLK,
TSYSCLK Falling
TCLK or TSYSCLK Rise
and Fall Times
Delay TCLK to TPOS,
TNEG Valid
Delay TCLK to TSYNC
See Figures 17–11 to 17–13 for details.
NOTES:
1. TSYSCLK = 1.544 MHz.
2. TSYSCLK = 2.048 MHz.
SYMBOL
t
–40ºC to +85ºC; ; V
t
R
t
t
t
t
t
t
t
t
t
t
t
t
t
t
PW
CH
LH
HD
DD
CP
CL
LL
SH
SU
SU
D2
SP
SP
SL
, t
F
(0ºC to 70ºC; V
MIN
122
122
75
75
75
75
50
50
20
50
20
20
79 of 87
TYP
DD
488
648
448
DD
= 2.97 to 3.63V for DS21FT40N)
= 2.97 to 3.63V for DS21FT40;
t CH –5
t SH –5
MAX
25
50
50
or
UNITS
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
NOTES
DS21FT40
1
2