DS26503L+ Maxim Integrated Products, DS26503L+ Datasheet - Page 20
DS26503L+
Manufacturer Part Number
DS26503L+
Description
IC T1/E1/J1 BITS ELEMENT 64-LQFP
Manufacturer
Maxim Integrated Products
Type
BITS Elementr
Datasheet
1.DS26503L.pdf
(122 pages)
Specifications of DS26503L+
Voltage - Supply
3.135 V ~ 3.465 V
Operating Temperature
0°C ~ 70°C
Mounting Type
Surface Mount
Package / Case
64-LQFP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Frequency-max
-
Output
-
Input
-
- Current page: 20 of 122
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WR (R/W)/
ALE (AS)/
BTS/HBE
RMODE2
TMODE3
A7/MPS1
RD(DS)/
CS/RLB
NAME
TYPE
I
I
I
I
I
Bus Type Select/Transmit and Receive B8ZS/HDB3 Enable
BTS: Strap high to select Motorola bus timing; strap low to select Intel bus
timing. This pin controls the function of the RD (DS), ALE (AS), and WR
(R/W) pins. If BTS = 1, then these pins assume the function listed in
parentheses ().
HBE: In Hardware Mode (BIS[1:0] = 11), this pin enables transmit and receive
B8ZS/HDB3 when in T1/E1 operating modes.
Read Input-Data Strobe/Receive Mode Select Bit 2
RD
= 01. See the bus timing diagrams.
RMODE2: In Hardware Mode (BIS[1:0] = 11), this pin selects the receive side
operating mode.
Chip Select/Remote Loopback Enable
CS
signal is used for both the parallel port and the serial port modes.
RLB: In Hardware Mode (BIS[1:0] = 11), when high, remote loopback is
enabled. This function is only valid when the transmit side and receive side are
in the same operating mode.
Address Latch Enable (Address Strobe)/Address Bus Bit 7/MCLK
Prescale Select 1
ALE (AS): In multiplexed bus operation (BIS[1:0] = 00), it serves to
demultiplex the bus on a positive-going edge.
A7: In nonmultiplexed bus operation (BIS[1:0] = 01), this pin serves as A[7].
MPS1: In Hardware Mode (BIS[1:0] = 11), MCLK prescale select, used to set
the prescale value for the PLL.
Write Input (Read/Write)/Transmit Mode Select 3
WR
TMODE3: In Hardware Mode, this pin selects the transmit-side operating
mode.
: This active-low signal must be low to read or write to the device. This
: In Processor Mode, this pin is the active-low write signal.
(
DS
): These pins are active-low signals. DS is active high when BIS[1:0]
20 of 122
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