DS8007A-EAG+ Maxim Integrated Products, DS8007A-EAG+ Datasheet - Page 9

• Manufacturer Part Number: DS8007A-EAG+
• Description: IC INTERFACE SMART CARD 48-LQFP
• Manufacturer: Maxim Integrated Products

Specifications of DS8007A-EAG+

• Applications: Smart Card
• Interface: Parallel
• Voltage - Supply: 2.7 V ~ 6 V
• Package / Case: 48-LQFP
• Mounting Type: Surface Mount
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

AC ELECTRICAL SPECIFICATIONS—TIMING PARAMETERS FOR CONSECUTIVE
READ/WRITE TO URR/UTR/TOC
(V
Note 4: Depends on the leading edge of WR or CS (whichever is deasserted first). Reference this specification to the rising edge
Note 5: PSC is the programmed prescaler value (31 or 32).
Figure 3. Timing Between Two Read Operations in Register URR
SEE FIGURE 3
RD Pulse Width
RD Low to Bit CRED = 1
Set Time Bit FE
Set Time Bit RBF
SEE FIGURE 4
WR/CS Pulse Width
WR/CS Low to I/Ox Low
SEE FIGURE 5
WR/CS Pulse Width
WR/CS High to Bit CRED = 1
CRED BIT
DD
RBF BIT
FE BIT
I/Ox
= 3.3V, V
INT
RD
of CS/WR instead of the falling edge.
PARAMETER
DDA
= 3.3V, T
_______________________________________________________________________________________
Multiprotocol Dual Smart Card Interface
t
SB(FE)
A
= +25°C, unless otherwise noted.)
SYMBOL
t
t
t
t
RD(URR)
WR(UTR)
WR(TOC)
t
SB(RBF)
t
t
t
SB(FE)
W(WR)
W(WR)
W(RD)
(Note 4)
(Notes 4 and 5)
t
SB(RBF)
CONDITIONS
t
W(RD)
t
RD(URR)
2t
2t
t
t
1 / PSC
W(WR)
W(RD)
CY(CLK)
CY(CLK)
10.5
10.5
MIN
10
10
10
+
+
TYP
3t
3t
t
t
W(WR)
W(RD)
2 / PSC
CY(CLK)
CY(CLK)
MAX
+
+
UNITS
ETU
ETU
ETU
ns
ns
ns
ns
ns
9