mc68194 ON Semiconductor, mc68194 Datasheet - Page 23

• Manufacturer Part Number: mc68194
• Description: Carrier Band Modem Cbm
• Manufacturer: ON Semiconductor

RXSYM0−RXSYM2,
XTAL1, XTAL2
SMREQ*
RXCLK
TXCLK
Figure 9−2. TTL, TXOUT, TXOUT*, Up* & Down* AC Test Load
RXSYM0−RXSYM2,
CBM
(A) TXSYMX, SMREQ* Setup and Hold Timing to TXCLK
TXCLK
2.5 V
SMIND*
(B) RXSYMX, SMIND* Delay Timing to RXCLK
1.5 V
(C) TXCLK Delay Timing to XTAL1, XTAL2
1.5 V
t
1.5 V
setup
t
TXCLK delay
INCLUDES JIG AND PROBE
CAPACITANCE
Figure 9−1. AC Test Waveforms
http://onsemi.com
2.5 V
1.5 V
t
1.5 V
hold
t
RX period
23
15 pF
t
TX period
1.5 V
t
RXSYM delay
t
TTL−
500 Ω
0.5 V
1.5 V
1.5 V
TEST POINT
2.5 V
t
TTL+